Lumpkin, G. R., and Ewing, R. C. (1995) Geochemical alteration of pyrochlore group minerals. American Mineralogist 80, 732-743 Table 3. Electron microprobe analyses of unaltered and altered pyrochlores ____________________________________________________________________ 084 084s 084 084s 084 084s 084 084s ____________________________________________________________________ Nb2O5 59.3 58.6 55.4 55.0 55.5 60.5 60.0 58.1 Ta2O5 2.79 3.14 3.71 2.91 3.63 2.77 2.59 2.66 TiO2 6.17 6.33 6.82 5.90 6.93 6.11 6.13 6.05 ZrO2 1.06 1.01 1.16 0.91 1.10 0.94 1.05 0.89 ThO2 2.02 2.51 2.79 1.89 3.04 1.96 1.77 1.93 UO2 0.62 1.42 2.34 1.19 2.14 0.87 0.61 1.02 Al2O3 0.00 0.00 0.00 0.01 0.00 0.02 0.00 0.02 Y2O3 0.21 0.25 0.24 0.34 0.28 0.27 0.24 0.74 Ln2O3 2.8 3.6 3.3 4.2 3.3 4.4 2.6 5.1 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CaO 16.5 10.3 15.5 8.80 15.4 10.2 16.2 7.97 MnO 0.00 0.09 0.00 0.11 0.00 0.08 0.01 0.34 FeO 0.26 0.49 0.43 1.57 0.40 0.52 0.36 0.53 SrO 0.00 0.18 0.00 0.37 0.00 0.15 0.00 0.35 BaO 0.00 0.01 0.01 0.01 0.04 0.00 0.00 0.06 PbO 0.10 0.08 0.02 0.11 0.07 0.18 0.08 0.14 Na2O 5.71 0.21 5.35 0.11 5.24 0.37 5.68 0.12 K2O 0.00 0.02 0.00 0.04 0.01 0.04 0.00 0.05 F 3.9 0.53 3.2 0.48 3.3 0.64 3.8 0.19 Sum 101.44 88.77 100.27 83.95 100.38 90.02 101.12 86.24 OºF -1.64 -0.22 -1.34 -0.20 -1.39 -0.27 -1.60 -0.08 Total 99.80 88.55 98.93 83.75 98.99 89.75 99.52 86.16 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 084 084s 084 084s 084 084s 084 084s ____________________________________________________________________ Nb 1.638 1.625 1.577 1.627 1.576 1.648 1.646 1.641 Ta 0.046 0.053 0.064 0.052 0.062 0.045 0.043 0.045 Ti 0.284 0.292 0.323 0.291 0.328 0.277 0.280 0.285 Zr 0.032 0.030 0.036 0.029 0.034 0.028 0.031 0.027 Al 0.000 0.000 0.000 0.001 0.000 0.002 0.000 0.002 Th 0.028 0.035 0.040 0.028 0.044 0.027 0.024 0.027 U 0.008 0.019 0.033 0.017 0.030 0.012 0.008 0.014 Y 0.007 0.008 0.008 0.012 0.009 0.009 0.008 0.025 Ln 0.062 0.080 0.076 0.100 0.076 0.097 0.057 0.116 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 1.081 0.677 1.046 0.618 1.037 0.659 1.054 0.534 Mn 0.000 0.005 0.000 0.006 0.000 0.004 0.001 0.018 Fe 0.013 0.025 0.023 0.086 0.021 0.026 0.018 0.028 Sr 0.000 0.006 0.000 0.014 0.000 0.005 0.000 0.013 Ba 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.001 Pb 0.002 0.001 0.000 0.002 0.001 0.003 0.001 0.002 Na 0.677 0.025 0.654 0.014 0.639 0.043 0.669 0.015 K 0.000 0.002 0.000 0.003 0.001 0.003 0.000 0.004 ·A 1.878 0.885 1.880 0.901 1.858 0.888 1.840 0.798 O 6.076 5.757 6.169 5.784 6.145 5.743 6.051 5.726 F 0.754 0.103 0.638 0.099 0.656 0.122 0.730 0.038 ·(X+Y) 6.830 5.860 6.807 5.883 6.801 5.865 6.781 5.764 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 086s 086s 086s 086s 294s 294s 294s 294s ____________________________________________________________________ Nb2O5 79.0 76.1 79.1 76.4 74.4 74.7 71.5 74.2 Ta2O5 0.00 0.00 0.00 0.00 0.26 0.06 0.20 0.12 TiO2 3.53 3.91 3.77 2.72 5.01 4.06 5.44 3.58 ZrO2 0.00 0.00 0.00 0.00 0.80 0.00 0.73 0.00 ThO2 0.00 0.05 0.00 0.00 0.09 0.09 0.00 0.00 UO2 0.07 0.22 0.16 0.22 0.61 0.16 0.31 0.22 Al2O3 0.00 0.03 0.00 0.02 0.22 0.05 0.55 0.30 Y2O3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Ln2O3 0.25 0.19 0.31 0.23 0.26 0.00 0.06 0.00 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CaO 0.20 0.57 0.19 0.64 0.39 0.17 0.28 0.23 MnO 0.00 0.01 0.03 0.00 0.09 0.02 0.01 0.00 FeO 0.02 1.82 0.06 0.45 0.51 0.04 0.14 0.05 SrO 3.08 2.45 3.34 2.60 3.76 3.91 4.54 4.41 BaO 0.47 0.35 0.43 0.45 0.34 0.39 0.32 0.29 PbO 0.25 0.22 0.23 0.08 0.22 0.20 0.05 0.26 Na2O 0.28 0.13 0.16 0.12 0.06 0.21 0.18 0.26 K2O 1.97 2.42 1.72 1.91 1.20 2.42 1.40 1.99 F 0.00 0.04 0.01 0.02 0.18 0.03 0.00 0.08 Sum 89.12 88.48 89.51 85.86 88.40 86.51 85.71 85.99 OºF -0.00 -0.02 -0.00 -0.01 -0.08 -0.01 -0.00 -0.03 Total 89.12 88.46 89.51 85.85 88.32 86.50 85.71 85.96 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 086s 086s 086s 086s 294s 294s 294s 294s ____________________________________________________________________ Nb 1.862 1.839 1.853 1.886 1.764 1.830 1.725 1.832 Ta 0.000 0.000 0.000 0.000 0.004 0.001 0.002 0.002 Ti 0.138 0.158 0.147 0.112 0.198 0.166 0.218 0.147 Zr 0.000 0.000 0.000 0.000 0.021 0.000 0.019 0.000 Al 0.000 0.003 0.000 0.002 0.014 0.003 0.035 0.019 Th 0.000 0.001 0.000 0.000 0.001 0.001 0.000 0.000 U 0.001 0.003 0.002 0.003 0.007 0.002 0.004 0.003 Y 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ln 0.005 0.004 0.006 0.005 0.005 0.000 0.001 0.000 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.011 0.032 0.011 0.037 0.022 0.010 0.016 0.013 Mn 0.000 0.000 0.001 0.000 0.004 0.001 0.000 0.000 Fe 0.001 0.082 0.003 0.021 0.022 0.002 0.006 0.002 Sr 0.093 0.076 0.100 0.082 0.114 0.123 0.140 0.139 Ba 0.010 0.007 0.009 0.010 0.007 0.008 0.007 0.006 Pb 0.004 0.003 0.003 0.001 0.003 0.003 0.001 0.004 Na 0.028 0.014 0.016 0.013 0.006 0.020 0.018 0.028 K 0.131 0.166 0.114 0.134 0.081 0.168 0.096 0.139 ·A 0.283 0.387 0.264 0.305 0.272 0.339 0.289 0.334 O 5.137 5.221 5.130 5.179 5.102 5.159 5.083 5.154 F 0.000 0.007 0.002 0.003 0.030 0.005 0.000 0.014 ·(X+Y) 5.137 5.228 5.132 5.182 5.132 5.164 5.083 5.168 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 090 090t 090 090t 090 090t 090 090t ____________________________________________________________________ Nb2O5 31.8 30.1 32.8 30.2 31.9 28.9 32.7 32.3 Ta2O5 13.3 12.0 13.2 12.0 13.2 12.1 13.5 11.7 TiO2 11.0 9.82 10.8 9.83 10.8 9.93 11.0 9.39 ZrO2 0.00 0.00 0.00 0.02 0.00 0.00 0.03 0.00 ThO2 0.43 0.08 0.22 0.26 0.29 0.37 0.19 0.11 UO2 21.8 19.3 19.9 18.6 21.4 18.9 21.7 16.9 Al2O3 0.00 0.00 0.01 0.02 0.00 0.00 0.00 0.00 Y2O3 0.19 0.10 0.17 0.29 0.15 0.13 0.15 0.00 Ln2O3 0.13 0.17 0.07 0.08 0.14 0.15 0.19 0.13 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CaO 13.7 11.4 13.2 11.6 13.7 12.3 13.3 10.3 MnO 0.40 0.41 0.45 0.33 0.32 0.36 0.37 0.34 FeO 1.48 1.66 1.41 1.88 1.52 2.20 1.22 2.21 SrO 0.00 0.90 0.04 0.94 0.09 1.10 0.05 1.05 BaO 0.00 0.13 0.00 0.24 0.00 0.28 0.02 0.25 PbO 2.37 1.98 2.45 1.84 2.05 1.71 1.77 1.72 Na2O 2.16 0.00 1.57 0.19 2.05 0.26 2.28 0.00 K2O 0.03 0.00 0.03 0.01 0.01 0.00 0.02 0.00 F 0.88 0.32 0.65 0.50 0.89 0.83 0.86 0.31 Sum 99.67 88.37 96.97 88.83 98.51 89.52 99.35 86.71 OºF -0.37 -0.14 -0.27 -0.21 -0.37 -0.35 -0.36 -0.13 Total 99.30 88.23 96.40 88.62 98.14 89.17 98.99 86.58 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 090 090t 090 090t 090 090t 090 090t ____________________________________________________________________ Nb 1.094 1.122 1.116 1.120 1.103 1.097 1.105 1.175 Ta 0.275 0.269 0.271 0.269 0.275 0.276 0.275 0.256 Ti 0.631 0.609 0.612 0.608 0.622 0.627 0.619 0.569 Zr 0.000 0.000 0.000 0.001 0.000 0.000 0.001 0.000 Al 0.000 0.000 0.001 0.002 0.000 0.000 0.000 0.000 Th 0.007 0.002 0.004 0.005 0.007 0.007 0.003 0.002 U 0.370 0.354 0.334 0.341 0.365 0.353 0.362 0.303 Y 0.008 0.004 0.007 0.013 0.006 0.006 0.006 0.012 Ln 0.004 0.005 0.002 0.002 0.004 0.005 0.005 0.004 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 1.118 1.007 1.066 1.023 1.123 1.106 1.066 0.888 Mn 0.026 0.029 0.029 0.023 0.021 0.026 0.023 0.023 Fe 0.094 0.115 0.089 0.129 0.097 0.155 0.076 0.149 Sr 0.000 0.043 0.002 0.045 0.004 0.053 0.002 0.049 Ba 0.000 0.004 0.000 0.008 0.000 0.009 0.001 0.008 Pb 0.049 0.044 0.050 0.041 0.042 0.039 0.036 0.037 Na 0.319 0.000 0.229 0.030 0.304 0.042 0.331 0.000 K 0.003 0.000 0.003 0.001 0.001 0.000 0.002 0.000 ·A 1.997 1.607 1.814 1.660 1.973 1.801 1.913 1.475 O 6.797 6.621 6.656 6.629 6.776 6.722 6.706 6.464 F 0.212 0.083 0.155 0.130 0.215 0.220 0.204 0.079 ·(X+Y) 7.009 6.704 6.811 6.759 6.991 6.942 6.910 6.543 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 177 177t 177s 177 177t 177s 177 177t ____________________________________________________________________ Nb2O5 55.5 48.9 53.7 54.0 49.6 57.8 54.8 50.3 Ta2O5 3.29 4.18 5.09 4.17 3.73 4.10 4.05 4.04 TiO2 6.75 7.18 6.05 6.42 7.18 7.69 6.02 7.22 ZrO2 1.33 1.43 1.90 1.52 1.35 1.74 1.44 1.42 ThO2 1.56 2.24 2.43 1.55 2.36 2.72 1.35 2.35 UO2 2.62 2.71 3.62 3.58 2.39 2.49 3.21 2.61 Al2O3 0.01 0.06 0.62 0.00 0.09 0.23 0.04 0.08 Y2O3 0.13 0.16 0.22 0.24 0.09 0.28 0.26 0.14 Ln2O3 3.2 4.2 5.9 3.5 2.9 4.7 3.1 3.7 MgO 0.00 0.00 0.55 0.00 0.00 0.43 0.00 0.05 CaO 15.7 14.6 4.66 15.6 15.1 4.49 15.5 15.2 MnO 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.02 FeO 0.12 0.91 0.79 0.23 0.89 1.49 0.14 1.02 SrO 0.14 1.06 0.34 0.11 0.83 0.35 0.06 0.97 BaO 0.08 0.06 0.10 0.09 0.10 0.06 0.09 0.09 PbO 0.35 0.14 0.10 0.35 0.10 0.19 0.29 0.13 Na2O 6.49 0.22 0.08 6.30 0.09 0.07 6.55 0.18 K2O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 F 4.1 0.38 0.25 3.9 0.36 0.09 3.9 0.41 Sum 101.37 88.43 86.40 101.56 87.16 88.98 100.75 89.95 OºF -1.72 -0.16 -0.11 -1.64 -0.15 -0.04 -1.64 -0.17 Total 99.65 88.27 86.29 99.92 87.01 88.94 99.11 89.78 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 177 177t 177s 177 177t 177s 177 177t ____________________________________________________________________ Nb 1.582 1.503 1.523 1.569 1.515 1.530 1.590 1.514 Ta 0.056 0.077 0.087 0.073 0.068 0.065 0.071 0.073 Ti 0.320 0.367 0.286 0.310 0.365 0.339 0.291 0.361 Zr 0.041 0.048 0.058 0.048 0.045 0.050 0.045 0.046 Al 0.001 0.005 0.046 0.000 0.007 0.016 0.003 0.006 Th 0.022 0.035 0.035 0.023 0.036 0.036 0.020 0.036 U 0.037 0.041 0.051 0.051 0.036 0.032 0.046 0.039 Y 0.007 0.006 0.007 0.008 0.003 0.009 0.009 0.005 Ln 0.073 0.104 0.135 0.082 0.071 0.100 0.073 0.090 Mg 0.000 0.000 0.051 0.000 0.000 0.038 0.000 0.005 Ca 1.064 1.064 0.313 1.074 1.093 0.282 1.066 1.084 Mn 0.000 0.000 0.000 0.000 0.000 0.003 0.000 0.001 Fe 0.006 0.052 0.042 0.012 0.050 0.073 0.008 0.057 Sr 0.005 0.042 0.012 0.004 0.032 0.012 0.002 0.037 Ba 0.002 0.002 0.003 0.002 0.003 0.001 0.002 0.002 Pb 0.006 0.003 0.002 0.006 0.002 0.003 0.005 0.002 Na 0.796 0.029 0.010 0.785 0.012 0.008 0.815 0.023 K 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.002 ·A 2.013 1.376 0.660 2.049 1.339 0.597 2.046 1.383 O 6.125 6.239 5.569 6.199 6.192 5.498 6.177 6.239 F 0.826 0.082 0.050 0.793 0.077 0.017 0.792 0.086 ·(X+Y) 6.951 6.321 5.619 6.992 6.269 5.515 6.969 6.325 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 181 181p 181t 181 181p 181t 187 187p ____________________________________________________________________ Nb2O5 60.2 61.5 58.8 60.8 62.3 58.6 61.4 59.4 Ta2O5 0.00 0.00 0.10 0.00 0.00 0.04 0.03 0.13 TiO2 3.69 3.87 4.62 3.92 3.66 4.57 3.92 4.73 ZrO2 2.88 2.31 2.46 2.98 1.62 2.33 2.52 2.68 ThO2 1.57 1.55 2.83 1.32 1.90 2.99 1.46 2.71 UO2 0.05 0.02 0.03 0.05 0.00 0.00 0.14 0.13 Al2O3 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.01 Y2O3 0.28 0.28 0.28 0.26 0.27 0.24 0.19 0.23 Ln2O3 4.4 5.4 7.7 5.1 5.9 6.4 3.3 3.9 MgO 0.03 0.03 0.04 0.05 0.00 0.03 0.00 0.00 CaO 16.9 12.0 11.9 16.8 11.7 12.8 17.1 13.7 MnO 0.00 0.21 0.14 0.09 0.35 0.22 0.07 0.49 FeO 0.95 2.22 3.20 1.08 2.53 2.91 0.98 2.57 SrO 0.18 0.84 0.58 0.18 0.48 0.82 0.32 0.60 BaO 0.04 0.23 0.35 0.08 0.08 0.65 0.00 0.30 PbO 0.24 0.30 0.20 0.15 0.29 0.21 0.24 0.26 Na2O 5.21 4.10 1.35 4.93 4.10 2.59 5.08 3.27 K2O 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 F 3.4 2.7 1.6 3.4 2.6 2.2 4.3 2.9 Sum 100.03 97.56 96.18 101.19 97.78 97.60 101.07 98.03 OºF -1.43 -1.13 -0.67 -1.43 -1.09 -0.92 -1.81 -1.22 Total 98.60 96.43 95.51 99.76 96.69 96.68 99.26 96.81 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 181 181p 181t 181 181p 181t 187 187p ____________________________________________________________________ Nb 1.732 1.746 1.699 1.724 1.776 1.705 1.736 1.691 Ta 0.000 0.000 0.002 0.000 0.000 0.001 0.001 0.002 Ti 0.177 0.183 0.222 0.185 0.174 0.221 0.185 0.224 Zr 0.090 0.071 0.077 0.091 0.050 0.073 0.077 0.082 Al 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.001 Th 0.023 0.022 0.041 0.019 0.027 0.044 0.021 0.039 U 0.001 0.000 0.000 0.001 0.000 0.000 0.002 0.002 Y 0.009 0.009 0.010 0.009 0.009 0.008 0.006 0.008 Ln 0.102 0.124 0.179 0.117 0.136 0.150 0.075 0.089 Mg 0.003 0.003 0.004 0.005 0.000 0.003 0.000 0.000 Ca 1.153 0.808 0.815 1.129 0.791 0.883 1.147 0.924 Mn 0.000 0.011 0.008 0.005 0.019 0.012 0.004 0.026 Fe 0.051 0.117 0.171 0.057 0.134 0.157 0.051 0.135 Sr 0.007 0.030 0.021 0.007 0.018 0.031 0.012 0.022 Ba 0.001 0.006 0.009 0.002 0.002 0.016 0.000 0.007 Pb 0.004 0.005 0.003 0.003 0.005 0.004 0.004 0.004 Na 0.643 0.499 0.167 0.600 0.502 0.323 0.617 0.399 K 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.002 ·A 1.997 1.635 1.430 1.951 1.641 1.630 1.939 1.658 O 6.278 6.079 6.171 6.258 6.119 6.220 6.137 6.104 F 0.685 0.537 0.324 0.675 0.519 0.448 0.852 0.578 ·(X+Y) 6.963 6.616 6.494 6.933 6.638 6.668 6.989 6.682 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 187 187p 187t 187 187p 187t 187 187p ____________________________________________________________________ Nb2O5 61.6 60.0 57.6 61.6 60.4 55.5 61.5 58.6 Ta2O5 0.05 0.04 0.08 0.01 0.00 0.22 0.04 0.15 TiO2 3.43 3.98 4.54 3.95 4.03 4.72 3.86 4.37 ZrO2 2.52 2.50 1.33 2.43 2.33 1.54 2.34 2.59 ThO2 1.31 1.81 1.93 1.36 1.79 3.17 1.53 2.67 UO2 0.14 0.16 0.10 0.10 0.09 0.18 0.00 0.09 Al2O3 0.01 0.01 0.00 0.01 0.02 0.01 0.01 0.00 Y2O3 0.19 0.19 0.24 0.21 0.24 0.22 0.21 0.20 Ln2O3 3.4 3.7 8.4 3.6 3.7 8.6 3.7 3.5 MgO 0.01 0.01 0.14 0.01 0.00 0.02 0.02 0.01 CaO 17.1 12.3 10.7 17.0 12.4 11.3 17.2 13.7 MnO 0.11 0.43 0.19 0.05 0.36 0.18 0.07 0.40 FeO 0.98 2.70 3.73 1.02 2.61 4.39 0.85 2.50 SrO 0.29 1.02 0.79 0.28 0.69 0.78 0.32 0.71 BaO 0.00 0.14 0.30 0.00 0.00 0.09 0.00 0.18 PbO 0.21 0.25 0.15 0.29 0.18 0.26 0.20 0.20 Na2O 4.99 4.03 0.39 4.98 4.14 0.74 4.91 3.74 K2O 0.02 0.04 0.04 0.01 0.04 0.03 0.01 0.01 F 4.7 3.3 0.67 4.1 3.1 1.0 4.2 3.2 Sum 101.06 96.61 91.32 101.01 96.12 92.95 100.97 96.82 OºF -1.97 -1.39 -0.28 -1.72 -1.30 -0.42 -1.76 -1.34 Total 99.09 95.22 91.04 99.29 94.82 92.53 99.21 95.48 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 187 187p 187t 187 187p 187t 187 187p ____________________________________________________________________ Nb 1.757 1.730 1.729 1.739 1.734 1.703 1.744 1.704 Ta 0.001 0.001 0.001 0.000 0.000 0.004 0.001 0.003 Ti 0.163 0.191 0.227 0.186 0.193 0.241 0.182 0.212 Zr 0.078 0.077 0.043 0.074 0.072 0.051 0.072 0.081 Al 0.001 0.001 0.000 0.001 0.001 0.001 0.001 0.000 Th 0.019 0.026 0.029 0.019 0.026 0.049 0.022 0.039 U 0.002 0.002 0.001 0.001 0.001 0.003 0.000 0.001 Y 0.006 0.006 0.008 0.007 0.008 0.008 0.007 0.007 Ln 0.078 0.086 0.203 0.081 0.086 0.213 0.085 0.082 Mg 0.001 0.001 0.001 0.001 0.000 0.002 0.002 0.001 Ca 1.157 0.841 0.761 1.138 0.844 0.822 1.157 0.945 Mn 0.006 0.023 0.011 0.003 0.019 0.010 0.004 0.022 Fe 0.052 0.144 0.207 0.053 0.139 0.250 0.045 0.135 Sr 0.011 0.038 0.030 0.010 0.025 0.031 0.012 0.026 Ba 0.000 0.004 0.008 0.000 0.000 0.002 0.000 0.005 Pb 0.004 0.004 0.003 0.005 0.003 0.005 0.003 0.003 Na 0.611 0.498 0.050 0.603 0.510 0.097 0.598 0.467 K 0.002 0.003 0.003 0.001 0.003 0.003 0.001 0.001 ·A 1.947 1.677 1.330 1.923 1.664 1.494 1.934 1.733 O 6.114 6.033 6.234 6.150 6.036 6.352 6.158 6.112 F 0.939 0.666 0.141 0.810 0.623 0.215 0.834 0.651 ·(X+Y) 7.053 6.699 6.375 6.960 6.659 6.567 6.992 6.763 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 197s 197s 197s 197s 290 290 290 290 ____________________________________________________________________ Nb2O5 66.0 63.4 68.9 71.6 63.0 63.6 64.9 63.4 Ta2O5 0.29 0.48 0.36 0.37 0.78 0.72 0.69 0.57 TiO2 3.76 3.52 3.19 4.03 3.26 4.34 4.14 3.78 ZrO2 0.11 0.15 0.08 0.47 0.67 0.37 0.35 0.26 ThO2 1.57 1.90 1.81 1.70 2.50 2.30 2.60 1.80 UO2 0.05 0.05 0.11 0.10 0.02 0.00 0.01 0.03 Al2O3 0.05 0.03 0.06 0.13 0.02 0.01 0.00 0.01 Y2O3 0.20 0.22 0.24 0.36 0.15 0.15 0.15 0.13 Ln2O3 0.61 0.91 0.82 0.79 1.0 1.6 1.8 1.3 MgO 0.00 0.00 0.00 0.05 0.00 0.01 0.00 0.01 CaO 3.63 2.90 5.49 13.4 15.4 15.6 15.6 15.6 MnO 0.00 0.03 0.05 0.15 0.02 0.04 0.03 0.00 FeO 0.39 0.45 1.12 2.20 0.33 0.09 0.11 0.05 SrO 15.4 14.6 11.9 0.20 0.38 0.39 0.39 0.40 BaO 0.10 0.11 0.36 0.09 0.01 0.00 0.00 0.00 PbO 0.68 0.98 0.44 0.36 0.14 0.14 0.08 0.05 Na2O 1.09 0.81 0.94 0.21 6.91 6.76 6.94 6.90 K2O 0.00 0.01 0.01 0.00 0.04 0.03 0.01 0.02 F 0.00 0.11 0.57 0.00 3.3 3.6 3.7 3.5 Sum 93.93 90.66 96.45 96.21 97.93 99.75 101.50 97.81 OºF -0.00 -0.05 -0.24 -0.00 -1.39 -1.51 -1.55 -1.47 Total 93.93 90.61 96.21 96.21 96.54 98.24 99.95 96.34 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 197s 197s 197s 197s 290 290 290 290 ____________________________________________________________________ Nb 1.816 1.817 1.845 1.803 1.808 1.774 1.789 1.802 Ta 0.005 0.008 0.006 0.006 0.013 0.012 0.011 0.010 Ti 0.172 0.167 0.142 0.169 0.156 0.202 0.190 0.179 Zr 0.033 0.046 0.023 0.013 0.021 0.011 0.010 0.008 Al 0.004 0.002 0.004 0.009 0.002 0.001 0.000 0.001 Th 0.022 0.027 0.024 0.022 0.036 0.032 0.036 0.026 U 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 Y 0.006 0.007 0.008 0.011 0.005 0.005 0.005 0.004 Ln 0.014 0.021 0.018 0.016 0.023 0.036 0.040 0.030 Mg 0.000 0.000 0.000 0.004 0.000 0.001 0.000 0.001 Ca 0.237 0.197 0.349 0.800 1.048 1.032 1.019 1.052 Mn 0.000 0.002 0.003 0.007 0.001 0.002 0.002 0.000 Fe 0.020 0.024 0.056 0.103 0.018 0.005 0.006 0.003 Sr 0.542 0.535 0.408 0.006 0.014 0.014 0.014 0.015 Ba 0.002 0.003 0.008 0.002 0.000 0.000 0.000 0.000 Pb 0.011 0.017 0.007 0.005 0.002 0.002 0.001 0.001 Na 0.129 0.100 0.108 0.023 0.851 0.809 0.820 0.842 K 0.000 0.001 0.001 0.000 0.003 0.002 0.001 0.002 ·A 0.983 0.934 0.990 1.000 2.002 1.941 1.944 1.974 O 5.850 5.827 5.844 5.956 6.204 6.129 6.135 6.153 F 0.000 0.022 0.107 0.000 0.663 0.703 0.714 0.697 ·(X+Y) 5.850 5.849 5.951 5.956 6.867 6.832 6.849 6.850 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 191 191s 191s 191s 191s 191s 191s 191s ____________________________________________________________________ Nb2O5 46.1 44.5 43.9 43.1 43.7 45.9 41.5 40.0 Ta2O5 4.96 4.87 5.75 6.09 4.52 4.80 5.58 8.30 TiO2 4.88 4.87 4.61 4.44 4.45 4.51 4.71 4.73 ZrO2 0.48 0.31 0.39 0.30 0.36 0.28 0.44 0.33 ThO2 0.03 0.06 0.01 0.08 0.01 0.03 0.00 0.09 UO2 24.4 21.6 22.8 21.5 21.8 20.8 23.7 22.4 Al2O3 0.05 0.08 0.06 0.08 0.05 0.06 0.06 0.08 Y2O3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Ln2O3 0.74 1.0 0.59 0.85 0.67 0.80 0.97 1.1 MgO 0.00 0.09 0.09 0.08 0.14 0.08 0.09 0.12 CaO 6.70 4.37 5.19 3.91 6.98 4.49 5.03 3.64 MnO 0.04 0.09 0.07 0.09 0.00 0.07 0.05 0.08 FeO 0.59 3.09 2.96 2.96 3.11 3.00 3.17 2.43 SrO 0.27 0.19 0.13 0.27 0.00 0.19 0.00 1.05 BaO 0.00 0.09 0.06 0.19 0.00 0.05 0.03 0.07 PbO 2.37 0.00 0.00 0.00 0.00 0.00 0.00 0.08 Na2O 0.03 0.03 0.01 0.02 0.00 0.04 0.00 0.00 K2O 0.03 0.23 0.15 0.24 0.05 0.22 0.13 0.18 F 0.91 0.22 0.00 0.03 0.02 0.17 0.00 0.02 Sum 92.58 85.69 86.77 84.23 85.86 85.49 85.46 84.69 OºF -0.38 -0.09 -0.00 -0.01 -0.01 -0.07 -0.00 -0.01 Total 92.20 85.60 86.77 84.22 85.85 85.42 85.46 84.68 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 191 191s 191s 191s 191s 191s 191s 191s ____________________________________________________________________ Nb 1.593 1.587 1.579 1.577 1.608 1.618 1.556 1.497 Ta 0.103 0.105 0.124 0.134 0.100 0.102 0.126 0.187 Ti 0.281 0.289 0.276 0.270 0.272 0.265 0.244 0.295 Zr 0.018 0.012 0.015 0.012 0.014 0.011 0.018 0.013 Al 0.005 0.007 0.006 0.007 0.005 0.005 0.006 0.008 Th 0.001 0.001 0.000 0.002 0.000 0.001 0.000 0.002 U 0.412 0.379 0.403 0.388 0.394 0.361 0.438 0.413 Y 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ln 0.021 0.029 0.017 0.025 0.020 0.022 0.029 0.033 Mg 0.000 0.011 0.011 0.009 0.017 0.009 0.011 0.015 Ca 0.549 0.369 0.442 0.340 0.609 0.375 0.448 0.323 Mn 0.003 0.006 0.004 0.006 0.000 0.005 0.003 0.006 Fe 0.038 0.204 0.197 0.200 0.212 0.196 0.220 0.168 Sr 0.012 0.009 0.006 0.012 0.000 0.008 0.000 0.050 Ba 0.000 0.003 0.002 0.006 0.000 0.001 0.001 0.002 Pb 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.002 Na 0.004 0.005 0.002 0.003 0.000 0.006 0.000 0.000 K 0.003 0.023 0.015 0.025 0.005 0.021 0.014 0.019 ·A 1.091 1.039 1.099 1.016 1.257 1.004 1.164 1.033 O 6.246 6.234 6.354 6.253 6.508 6.200 6.447 6.290 F 0.220 0.055 0.000 0.008 0.006 0.043 0.000 0.005 ·(X+Y) 6.466 6.289 6.354 6.261 6.514 6.243 6.447 6.296 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 214 214t 214s 214 214t 214s 214 214t ____________________________________________________________________ Nb2O5 34.8 33.0 36.3 34.8 33.8 33.1 34.9 34.0 Ta2O5 9.13 8.18 8.59 9.23 8.11 9.38 9.28 8.10 TiO2 12.4 11.3 11.8 12.3 11.2 11.3 12.6 11.2 ZrO2 0.00 0.00 0.00 0.01 0.00 0.02 0.00 0.00 ThO2 1.01 0.61 0.92 0.88 0.81 1.13 1.01 0.96 UO2 19.3 18.2 17.0 19.3 17.6 17.1 18.9 18.0 Al2O3 0.08 0.10 0.10 0.09 0.07 0.12 0.09 0.09 Y2O3 0.27 0.11 1.31 0.33 0.12 0.56 0.29 0.27 Ln2O3 0.64 0.43 0.85 0.60 0.07 1.1 0.81 0.33 MgO 0.02 0.00 0.02 0.01 0.00 0.03 0.05 0.00 CaO 13.4 11.0 6.82 11.6 10.7 6.52 13.0 10.9 MnO 0.29 0.30 0.19 0.34 0.32 0.20 0.25 0.31 FeO 3.12 3.11 2.42 2.58 2.98 2.52 3.27 2.70 SrO 0.09 0.76 0.48 0.00 0.84 0.44 0.03 0.60 BaO 0.05 0.06 0.26 0.04 0.06 0.19 0.08 0.11 PbO 1.30 1.77 1.10 2.14 1.88 0.97 0.91 1.35 Na2O 1.40 0.00 0.01 2.42 0.00 0.00 0.69 0.39 K2O 0.04 0.01 0.06 0.06 0.02 0.07 0.03 0.03 F 1.4 1.4 0.23 1.4 1.3 0.41 1.1 1.0 Sum 98.74 90.34 88.46 98.13 89.88 85.16 97.29 90.34 OºF -0.59 -0.59 -0.10 -0.59 -0.55 -0.17 -0.46 -0.42 Total 98.15 89.75 88.36 97.54 89.33 84.99 96.83 89.92 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 214 214t 214s 214 214t 214s 214 214t ____________________________________________________________________ Nb 1.138 1.158 1.183 1.140 1.176 1.144 1.130 1.177 Ta 0.180 0.173 0.168 0.182 0.170 0.195 0.181 0.169 Ti 0.675 0.660 0.640 0.670 0.648 0.650 0.680 0.646 Zr 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 Al 0.007 0.009 0.009 0.008 0.006 0.011 0.008 0.008 Th 0.017 0.011 0.015 0.015 0.014 0.020 0.016 0.017 U 0.311 0.315 0.273 0.311 0.302 0.291 0.302 0.307 Y 0.010 0.005 0.050 0.012 0.005 0.023 0.011 0.011 Ln 0.017 0.012 0.022 0.016 0.002 0.031 0.021 0.009 Mg 0.002 0.000 0.002 0.001 0.000 0.003 0.005 0.000 Ca 1.039 0.915 0.527 0.901 0.882 0.534 0.999 0.895 Mn 0.018 0.020 0.012 0.021 0.021 0.013 0.015 0.020 Fe 0.189 0.202 0.146 0.156 0.192 0.161 0.196 0.173 Sr 0.004 0.034 0.020 0.000 0.037 0.019 0.001 0.027 Ba 0.001 0.002 0.007 0.001 0.002 0.006 0.002 0.003 Pb 0.025 0.037 0.021 0.042 0.039 0.020 0.018 0.028 Na 0.196 0.000 0.001 0.340 0.000 0.000 0.096 0.058 K 0.004 0.001 0.006 0.006 0.002 0.007 0.003 0.003 ·A 1.834 1.553 1.103 1.822 1.498 1.128 1.686 1.551 O 6.570 6.375 6.069 6.486 6.327 6.077 6.498 6.402 F 0.321 0.344 0.052 0.321 0.316 0.099 0.250 0.242 ·(X+Y) 6.891 6.719 6.121 6.807 6.643 6.176 6.748 6.644 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 216 216p 216s 216 216p 216s 216 216p ____________________________________________________________________ Nb2O5 44.3 39.6 40.3 45.1 40.9 42.9 43.2 38.9 Ta2O5 2.17 1.61 2.02 1.81 1.66 1.94 2.16 1.62 TiO2 11.4 10.2 10.9 11.5 9.88 11.3 11.2 9.72 ZrO2 0.02 0.00 0.00 0.00 0.00 0.00 0.01 0.01 ThO2 0.13 0.20 0.19 0.18 0.19 0.16 0.20 0.16 UO2 21.6 18.9 19.5 21.5 19.0 20.7 22.2 18.7 Al2O3 0.21 0.22 0.19 0.21 0.24 0.16 0.21 0.23 Y2O3 0.14 0.09 0.06 0.12 0.13 0.10 0.13 0.03 Ln2O3 0.13 0.02 0.16 0.19 0.05 0.00 0.12 0.00 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CaO 12.7 14.5 11.7 12.6 15.0 9.49 13.5 15.7 MnO 0.16 0.12 0.14 0.16 0.09 0.18 0.18 0.21 FeO 4.14 3.76 3.67 4.07 3.39 2.78 3.92 3.91 SrO 0.16 0.62 0.31 0.14 0.70 0.38 0.19 1.00 BaO 0.12 0.03 0.04 0.14 0.03 0.09 0.14 0.00 PbO 0.55 0.70 0.64 0.71 0.67 0.67 0.65 0.58 Na2O 0.46 0.21 0.03 0.61 0.34 0.22 0.67 0.12 K2O 0.06 0.00 0.03 0.04 0.02 0.03 0.03 0.03 F 0.43 1.1 0.26 0.34 0.89 0.09 1.1 0.54 Sum 98.88 91.88 90.14 99.42 93.18 91.19 99.81 91.49 OºF -0.18 -0.46 -0.11 -0.14 -0.37 -0.04 -0.46 -0.23 Total 98.70 91.42 90.03 99.28 92.81 91.15 99.35 91.26 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 216 216p 216s 216 216p 216s 216 216p ____________________________________________________________________ Nb 1.360 1.363 1.340 1.369 1.387 1.356 1.357 1.373 Ta 0.040 0.033 0.040 0.033 0.034 0.037 0.041 0.034 Ti 0.582 0.584 0.603 0.581 0.558 0.594 0.585 0.571 Zr 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Al 0.017 0.020 0.017 0.017 0.021 0.013 0.017 0.021 Th 0.002 0.003 0.003 0.003 0.003 0.003 0.003 0.003 U 0.327 0.320 0.319 0.322 0.317 0.322 0.343 0.325 Y 0.005 0.004 0.002 0.004 0.005 0.004 0.005 0.001 Ln 0.003 0.001 0.004 0.005 0.001 0.000 0.003 0.000 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.924 1.183 0.922 0.907 1.206 0.711 1.005 1.314 Mn 0.009 0.008 0.009 0.009 0.006 0.011 0.011 0.014 Fe 0.235 0.240 0.226 0.229 0.213 0.163 0.228 0.256 Sr 0.006 0.027 0.013 0.005 0.030 0.015 0.008 0.045 Ba 0.003 0.001 0.001 0.004 0.001 0.002 0.004 0.000 Pb 0.010 0.014 0.013 0.013 0.014 0.013 0.012 0.012 Na 0.061 0.031 0.004 0.079 0.049 0.030 0.090 0.018 K 0.005 0.000 0.003 0.003 0.002 0.003 0.003 0.003 ·A 1.591 1.832 1.520 1.583 1.848 1.276 1.715 1.991 O 6.536 6.699 6.494 6.527 6.741 6.266 6.588 6.936 F 0.092 0.263 0.061 0.072 0.211 0.020 0.242 0.133 ·(X+Y) 6.628 6.962 6.555 6.599 6.952 6.286 6.830 7.069 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 289 289t 289 289t 289 289t 289 289t ____________________________________________________________________ Nb2O5 43.4 41.4 43.5 39.2 43.9 39.4 44.1 40.2 Ta2O5 2.18 1.75 2.05 2.04 2.20 2.14 2.17 2.08 TiO2 12.4 11.4 12.8 11.5 12.3 11.6 12.4 11.9 ZrO2 0.05 0.05 0.08 0.00 0.12 0.00 0.08 0.04 ThO2 0.06 0.08 0.06 0.13 0.14 0.05 0.13 0.10 UO2 22.0 21.2 22.5 20.5 22.2 20.7 22.1 21.6 Al2O3 0.17 0.17 0.17 0.14 0.19 0.14 0.16 0.17 Y2O3 0.15 0.15 0.15 0.09 0.17 0.01 0.19 0.08 Ln2O3 0.22 0.12 0.16 0.05 0.26 0.14 0.32 0.13 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 CaO 13.8 10.4 13.2 10.1 13.4 10.2 13.4 9.99 MnO 0.22 0.05 0.15 0.15 0.19 0.12 0.13 0.36 FeO 0.84 0.71 0.78 0.82 0.69 0.93 0.73 0.65 SrO 0.36 0.30 0.00 0.40 0.00 0.55 0.13 0.30 BaO 0.02 0.00 0.03 0.06 0.00 0.11 0.00 0.00 PbO 2.03 1.99 2.98 1.78 2.99 1.56 2.51 1.65 Na2O 1.74 0.02 1.55 0.00 1.63 0.01 1.69 0.01 K2O 0.03 0.03 0.03 0.04 0.02 0.06 0.05 0.04 F 1.5 0.20 1.1 0.15 1.1 0.07 0.82 0.00 Sum 101.17 90.02 101.29 87.15 101.50 87.79 101.11 89.31 OºF -0.63 -0.08 -0.46 -0.06 -0.46 -0.03 -0.34 -0.00 Total 100.54 89.94 100.83 87.09 101.04 87.76 100.77 89.31 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 289 289t 289 289t 289 289t 289 289t ____________________________________________________________________ Nb 1.318 1.337 1.307 1.308 1.324 1.305 1.325 1.302 Ta 0.040 0.034 0.037 0.041 0.040 0.043 0.039 0.041 Ti 0.627 0.613 0.640 0.639 0.617 0.640 0.620 0.642 Zr 0.002 0.002 0.003 0.000 0.004 0.000 0.003 0.001 Al 0.013 0.014 0.013 0.012 0.015 0.012 0.013 0.014 Th 0.001 0.001 0.001 0.002 0.002 0.001 0.002 0.002 U 0.329 0.337 0.333 0.337 0.330 0.338 0.327 0.345 Y 0.006 0.006 0.005 0.004 0.006 0.004 0.007 0.003 Ln 0.005 0.003 0.004 0.001 0.006 0.004 0.008 0.003 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 Ca 0.994 0.796 0.940 0.799 0.958 0.801 0.955 0.767 Mn 0.013 0.003 0.008 0.009 0.011 0.007 0.007 0.022 Fe 0.047 0.042 0.043 0.051 0.039 0.057 0.041 0.039 Sr 0.014 0.012 0.000 0.017 0.000 0.023 0.005 0.012 Ba 0.001 0.000 0.001 0.002 0.000 0.003 0.000 0.000 Pb 0.037 0.038 0.053 0.035 0.054 0.031 0.045 0.032 Na 0.227 0.003 0.200 0.000 0.211 0.001 0.218 0.001 K 0.003 0.003 0.003 0.004 0.002 0.006 0.004 0.004 ·A 1.675 1.245 1.592 1.261 1.618 1.273 1.618 1.231 O 6.413 6.241 6.379 6.252 6.408 6.270 6.433 6.242 F 0.310 0.045 0.231 0.035 0.232 0.016 0.172 0.000 ·(X+Y) 6.723 6.286 6.610 6.287 6.640 6.286 6.605 6.242 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 298 298s 298 298s 298 298s 298 298s ____________________________________________________________________ Nb2O5 49.9 49.6 50.9 59.1 48.5 54.0 51.6 57.6 Ta2O5 3.47 3.63 3.54 2.31 3.68 2.08 3.52 2.45 TiO2 9.02 9.63 8.58 8.37 9.63 7.85 9.28 8.36 ZrO2 0.33 0.37 0.30 0.16 0.34 0.18 0.36 0.15 ThO2 2.83 2.56 1.96 2.19 2.68 2.45 2.44 2.11 UO2 2.50 3.08 2.71 1.95 3.52 1.94 2.60 1.57 Al2O3 0.12 0.02 0.00 0.01 0.14 0.16 0.01 0.00 Y2O3 0.44 0.43 0.39 0.45 0.55 0.41 0.52 0.46 Ln2O3 6.0 5.8 4.9 4.3 5.9 5.2 4.8 4.3 MgO 0.00 0.06 0.00 0.00 0.00 0.09 0.00 0.00 CaO 14.4 3.99 14.7 4.68 14.2 3.41 14.7 6.09 MnO 0.07 1.42 0.10 1.29 0.14 1.28 0.07 0.97 FeO 0.18 0.85 0.70 1.41 0.21 1.58 0.19 1.23 SrO 0.00 0.27 0.00 0.35 0.00 0.46 0.00 0.00 BaO 0.05 3.00 0.01 0.45 0.03 3.02 0.00 0.10 PbO 0.14 0.34 0.22 0.41 0.34 0.44 0.30 0.33 Na2O 5.41 0.13 5.54 0.54 5.12 0.32 5.69 0.50 K2O 0.00 0.13 0.01 0.21 0.01 0.13 0.01 0.18 F 4.7 0.75 5.2 0.17 4.7 0.12 5.6 0.30 Sum 99.56 86.06 99.76 88.35 99.69 85.12 101.69 86.70 OºF -1.97 -0.32 -2.18 -0.07 -1.97 -0.05 -2.35 -0.13 Total 97.59 85.74 97.58 88.28 97.72 85.07 99.34 86.57 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 298 298s 298 298s 298 298s 298 298s ____________________________________________________________________ Nb 1.475 1.452 1.504 1.584 1.437 1.567 1.483 1.575 Ta 0.062 0.064 0.063 0.037 0.066 0.036 0.061 0.040 Ti 0.443 0.470 0.373 0.373 0.475 0.379 0.444 0.381 Zr 0.011 0.012 0.010 0.005 0.011 0.006 0.011 0.004 Al 0.009 0.002 0.000 0.001 0.011 0.012 0.001 0.000 Th 0.042 0.038 0.029 0.030 0.040 0.036 0.035 0.029 U 0.036 0.044 0.039 0.026 0.051 0.028 0.037 0.021 Y 0.015 0.015 0.014 0.014 0.019 0.014 0.018 0.015 Ln 0.143 0.137 0.117 0.093 0.141 0.122 0.111 0.095 Mg 0.000 0.006 0.000 0.000 0.000 0.009 0.000 0.000 Ca 1.010 0.277 1.031 0.297 0.998 0.235 1.002 0.395 Mn 0.004 0.078 0.006 0.065 0.008 0.070 0.004 0.050 Fe 0.010 0.046 0.038 0.070 0.012 0.085 0.010 0.062 Sr 0.000 0.010 0.000 0.012 0.000 0.017 0.000 0.000 Ba 0.001 0.076 0.000 0.010 0.001 0.076 0.000 0.002 Pb 0.002 0.006 0.004 0.007 0.006 0.008 0.005 0.005 Na 0.686 0.049 0.703 0.062 0.651 0.040 0.702 0.059 K 0.000 0.011 0.001 0.016 0.001 0.011 0.001 0.014 ·A 1.949 0.793 1.981 0.702 1.927 0.748 1.924 0.747 O 6.034 5.603 6.009 5.566 6.031 5.638 5.918 5.594 F 0.974 0.154 1.076 0.032 0.975 0.024 1.127 0.057 ·(X+Y) 7.008 5.757 7.085 5.598 7.006 5.662 7.045 5.651 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 299A 299A 299A 299A 299Bs 299Bs 299Bs 299Bs ____________________________________________________________________ Nb2O5 67.4 65.9 67.8 68.7 74.4 72.8 73.8 76.4 Ta2O5 0.01 0.06 0.03 0.04 0.39 0.07 0.09 0.07 TiO2 3.46 4.19 3.57 3.29 3.92 3.74 3.79 3.82 ZrO2 0.00 0.88 0.00 0.00 0.01 0.00 0.01 0.00 ThO2 0.07 0.12 0.12 0.09 0.06 0.15 0.15 0.07 UO2 0.04 0.02 0.02 0.00 1.07 0.13 0.09 0.16 Al2O3 0.00 0.01 0.01 0.01 0.05 0.05 0.05 0.02 Y2O3 0.13 0.08 0.12 0.12 0.23 0.18 0.19 0.18 Ln2O3 0.71 0.68 0.34 0.67 0.34 0.05 0.11 0.18 MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CaO 15.1 15.2 15.4 15.3 0.64 0.19 0.21 0.19 MnO 0.02 0.01 0.01 0.00 0.00 0.05 0.02 0.03 FeO 0.04 0.03 0.02 0.07 0.52 0.18 0.12 0.14 SrO 0.69 0.76 0.72 0.73 3.68 3.84 3.92 4.02 BaO 0.03 0.00 0.01 0.05 0.99 1.33 1.30 1.60 PbO 0.25 0.19 0.21 0.05 0.24 0.27 0.32 0.21 Na2O 7.60 7.36 7.57 7.78 0.00 0.01 0.01 0.03 K2O 0.00 0.02 0.03 0.02 0.71 1.60 2.22 1.85 F 6.1 5.7 5.4 5.8 0.00 0.00 0.00 0.00 Sum 101.65 101.21 101.38 102.72 87.25 84.64 86.40 88.97 OºF -2.56 -2.39 -2.27 -2.44 -0.00 -0.00 -0.00 -0.00 Total 99.09 98.82 99.11 100.28 87.25 84.64 86.40 88.97 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 299A 299A 299A 299A 299Bs 299Bs 299Bs 299Bs ____________________________________________________________________ Nb 1.843 1.783 1.838 1.850 1.830 1.839 1.839 1.845 Ta 0.000 0.001 0.000 0.001 0.006 0.001 0.001 0.001 Ti 0.157 0.189 0.161 0.148 0.161 0.157 0.157 0.153 Zr 0.000 0.026 0.000 0.000 0.000 0.000 0.000 0.000 Al 0.000 0.001 0.001 0.001 0.003 0.003 0.003 0.001 Th 0.001 0.002 0.002 0.001 0.001 0.002 0.002 0.001 U 0.001 0.000 0.000 0.000 0.013 0.002 0.001 0.002 Y 0.004 0.003 0.004 0.004 0.007 0.005 0.006 0.005 Ln 0.016 0.015 0.007 0.015 0.007 0.001 0.002 0.004 Mg 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.979 0.975 0.990 0.977 0.037 0.011 0.012 0.011 Mn 0.001 0.001 0.001 0.000 0.000 0.002 0.001 0.001 Fe 0.002 0.002 0.001 0.003 0.024 0.008 0.006 0.006 Sr 0.024 0.026 0.025 0.025 0.116 0.124 0.125 0.124 Ba 0.001 0.000 0.000 0.001 0.021 0.029 0.028 0.034 Pb 0.004 0.003 0.003 0.001 0.004 0.004 0.005 0.003 Na 0.891 0.855 0.880 0.899 0.000 0.001 0.001 0.003 K 0.000 0.002 0.002 0.002 0.049 0.114 0.156 0.126 ·A 1.923 1.882 1.915 1.928 0.278 0.305 0.345 0.320 O 5.827 5.817 5.888 5.867 5.190 5.172 5.191 5.184 F 1.167 1.080 1.025 1.094 0.000 0.000 0.000 0.000 ·(X+Y) 6.994 6.897 6.913 6.961 5.190 5.172 5.191 5.184 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 325 325p 325 325p 325 325p 325 325p ____________________________________________________________________ Nb2O5 48.4 45.2 48.5 40.6 48.7 44.0 47.3 43.5 Ta2O5 11.4 11.3 10.7 11.4 11.0 11.1 12.8 10.8 TiO2 0.66 0.69 0.46 0.85 0.60 0.79 0.59 0.56 ZrO2 1.54 1.49 1.26 1.76 1.60 1.66 1.57 1.58 ThO2 2.21 1.71 1.04 0.77 2.30 0.99 1.50 0.87 UO2 19.7 20.3 22.7 22.7 20.2 22.5 22.6 22.4 Al2O3 0.12 0.13 0.12 0.15 0.10 0.14 0.11 0.14 Y2O3 0.00 0.00 0.01 0.00 0.00 0.02 0.00 0.00 Ln2O3 0.15 0.66 0.12 0.24 0.21 0.30 0.26 0.02 MgO 0.37 0.29 0.39 0.33 0.38 0.34 0.25 0.41 CaO 9.25 2.92 6.96 7.50 9.21 7.17 7.02 7.85 MnO 0.00 0.62 0.01 0.27 0.00 0.44 0.00 0.40 FeO 1.61 1.15 0.90 3.38 1.37 2.19 1.08 1.64 SrO 0.00 1.68 0.00 3.06 0.01 3.37 0.00 3.99 BaO 0.00 4.93 0.04 0.47 0.03 0.68 0.01 0.52 PbO 0.26 0.00 0.50 0.22 0.26 0.26 0.27 0.26 Na2O 1.96 0.26 4.04 0.50 1.32 0.32 2.40 0.28 K2O 0.02 0.07 0.04 0.08 0.04 0.05 0.07 0.10 F 1.5 0.09 1.2 0.39 1.7 0.63 1.2 0.65 Sum 99.15 93.49 98.96 94.67 99.03 96.95 99.03 95.97 OºF -0.63 -0.04 -0.50 -0.16 -0.71 -0.26 -0.50 -0.27 Total 98.52 93.45 98.46 94.51 98.32 96.69 98.53 95.70 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 325 325p 325 325p 325 325p 325 325p ____________________________________________________________________ Nb 1.659 1.641 1.691 1.588 1.671 1.624 1.631 1.642 Ta 0.235 0.247 0.224 0.268 0.227 0.247 0.266 0.245 Ti 0.038 0.042 0.027 0.055 0.034 0.049 0.034 0.035 Zr 0.057 0.058 0.047 0.074 0.059 0.066 0.059 0.064 Al 0.011 0.012 0.011 0.015 0.009 0.014 0.010 0.014 Th 0.038 0.031 0.018 0.015 0.040 0.018 0.026 0.017 U 0.333 0.363 0.390 0.437 0.341 0.409 0.384 0.416 Y 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ln 0.004 0.019 0.003 0.008 0.006 0.009 0.007 0.001 Mg 0.042 0.035 0.045 0.043 0.043 0.041 0.028 0.051 Ca 0.752 0.251 0.575 0.695 0.749 0.628 0.574 0.702 Mn 0.000 0.042 0.001 0.020 0.000 0.030 0.000 0.028 Fe 0.102 0.077 0.058 0.245 0.087 0.150 0.069 0.115 Sr 0.000 0.078 0.000 0.153 0.000 0.159 0.000 0.193 Ba 0.000 0.156 0.001 0.016 0.001 0.022 0.000 0.017 Pb 0.005 0.000 0.010 0.005 0.005 0.006 0.006 0.006 Na 0.288 0.040 0.604 0.084 0.194 0.051 0.355 0.045 K 0.002 0.007 0.004 0.009 0.004 0.005 0.007 0.011 ·A 1.566 1.100 1.710 1.729 1.470 1.529 1.457 1.601 O 6.556 6.407 6.621 7.005 6.495 6.781 6.489 6.857 F 0.360 0.023 0.293 0.107 0.408 0.163 0.290 0.172 ·(X+Y) 6.916 6.430 6.914 7.112 6.903 6.944 6.779 7.029 ____________________________________________________________________ Table 3. Continued ____________________________________________________________________ 1C24s 1C24s 1C24s 1C24s ____________________________________________________________________ Nb2O5 66.6 63.8 66.1 67.2 Ta2O5 0.28 0.26 0.23 0.29 TiO2 3.30 3.61 3.10 3.48 ZrO2 0.19 0.26 0.14 0.16 ThO2 1.64 2.65 2.08 2.49 UO2 0.17 0.17 0.18 0.16 Al2O3 0.11 0.12 0.10 0.16 Y2O3 0.14 0.14 0.10 0.10 Ln2O3 4.5 4.6 4.3 2.5 MgO 0.03 0.02 0.02 0.03 CaO 0.19 0.39 0.09 0.33 MnO 0.02 0.02 0.00 0.00 FeO 0.44 0.69 0.27 0.85 SrO 0.05 0.05 0.05 0.09 BaO 17.3 16.9 16.7 18.0 PbO 0.17 0.13 0.10 0.02 Na2O 0.04 0.05 0.05 0.07 K2O 0.01 0.02 0.02 0.03 F 0.15 0.43 0.13 0.20 Sum 95.33 94.31 93.76 96.16 OºF -0.06 -0.18 -0.05 -0.08 Total 95.27 94.13 93.71 96.08 ____________________________________________________________________ Structural formulas based on ·B = 2.00 ____________________________________________________________________ 1C24s 1C24s 1C24s 1C24s ____________________________________________________________________ Nb 1.830 1.809 1.841 1.822 Ta 0.005 0.004 0.004 0.005 Ti 0.151 0.170 0.144 0.157 Zr 0.006 0.008 0.004 0.005 Al 0.008 0.009 0.007 0.011 Th 0.023 0.038 0.029 0.034 U 0.002 0.002 0.002 0.002 Y 0.005 0.005 0.003 0.003 Ln 0.100 0.105 0.097 0.055 Mg 0.003 0.002 0.002 0.003 Ca 0.012 0.026 0.006 0.021 Mn 0.001 0.001 0.000 0.000 Fe 0.022 0.036 0.014 0.043 Sr 0.002 0.002 0.002 0.003 Ba 0.413 0.416 0.404 0.424 Pb 0.003 0.002 0.002 0.000 Na 0.005 0.006 0.006 0.008 K 0.001 0.002 0.002 0.002 ·A 0.591 0.643 0.568 0.599 O 5.565 5.594 5.552 5.548 F 0.029 0.085 0.025 0.038 ·(X+Y) 5.594 5.679 5.577 5.586 ____________________________________________________________________ Notes: A letter at the end of each sample number refers to the type of alteration, p = primary, t = transitional, and s = secondary. Ln = lanthanides (La, Ce, Pr, Nd, Sm, Gd, Dy, Er, and Yb were included in the analyses). Minimum detection limits are approximately 0.02-0.04 wt% for the oxides of Mg, K, Ca, Mn, Fe, Sr, Cs, Ba, and Pb; 0.04-0.06 wt% for the oxides of Na, Si, Nb, and Ta; 0.06-0.08 wt% for the oxides of Al, Ti, Y, Zr, Sn, Sb, and Ln; and 0.08-0.12 wt% for the oxides of W, Bi, Th, U, and elemental F. The elements Si, Sn, Sb, Cs, W, and Bi were consistently near or below detection limits in this group of samples and are not reported. Structural formulas were calculated assuming the B-site to be occupied by Nb, Ta, Ti, Zr, and Al. All Fe was calculated as Fe2+ and allocated to the A-site.