ARTICLES

J. David Hobbs, Randall T. Cygan, Kathryn L. Nagy, Peter A. Schultz, and Mark P. Sears
All-atom ab initio energy minimization of the kaolinite crystal structure    657
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Renata M. Wentzcovitch and Lars Stixrude
Crystal chemistry of forsterite: A first-principles study    663
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O.V. Krasovska, B. Winkler, E.E. Krasovskii, A.N. Yaresko, V.N. Antonov, and N. Langer
Ab initio calculation of the pleochroism of fayalite    672
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Jutta Chrosch, Ulrich Bismayer, and Ekhard K.H. Salje
Anti-phase boundaries and phase transitions in titanite: An X-ray diffraction study    677
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Nancy L. Ross
The equation of state and high-pressure behavior of magnesite    682
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Demelza Hugh-Jones
Thermal expansion of MgSiO₃ and FeSiO₃ ortho- and clinopyroxenes    689
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Ronald Miletich, David R. Allan, and Ross J. Angel
The synthetic Cr²⁺ silicates BaCrSi₄O₁₀ and SrCrSi₄O₁₀: The missing links in the gillespite-type ABSi₄O₁₀ series    697
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Frank C. Hawthorne, Giancarlo Della Ventura, Jean-Louis Robert, Mark D. Welch, Mati Raudsepp, and David M. Jenkins
A Rietveld and infrared study of synthetic amphiboles along the potassium-richterite-tremolite join    708
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Amy A. Gribb and Jillian F. Banfield
Particle size effects on transformation kinetics and phase stability in nanocrystalline TiO₂    717
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Giuseppe Cruciani, Gilberto Artioli, Alessandro Gualtieri, Kenny Ståhl, and Jonathan C. Hanson
Dehydration dynamics of stilbite using synchrotron X-ray powder diffraction    729
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Charles A. Geiger and Thomas Armbruster
Mn₃Al₂Si₃O₁₂ spessartine and Ca₃Al₂Si₃O₁₂ grossular garnet: Structural dynamic and thermodynamic properties    740
Abstract
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Dimitrios Xirouchakis, Martin Kunz, John B. Parise, and Donald H. Lindsley
Synthesis methods and unit-cell volume of end-member titanite (CaTiOSiO₄)    748
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Dimitrios Xirouchakis, Sophie Fritsch, Robert L. Putnam, Alexandra Navrotsky, and Donald H. Lindsley
Thermochemistry and the enthalpy of formation of synthetic end-member (CaTiSiO₅) titanite    754
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Bernd Wunder, Alain Baronnet, and Werner Schreyer
Ab-initio synthesis and TEM confirmation of antigorite in the system MgO-SiO₂-H₂O    760
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Renaud Podor and Michel Cuney
Experimental study of Th-bearing LaPO₄ (780 °C, 200 MPa): Implications for monazite and actinide orthophosphate stability    765
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René Gratz and Wilhelm Heinrich
Monazite-xenotime thermobarometry: Experimental calibration of the miscibility gap in the binary system CePO₄-YPO₄    772
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Carlos Jové and Bradley R. Hacker
Experimental investigation of laumontite → wairakite + H₂O: A model diagenetic reaction    781
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E.D. Young, D. Virgo, and R.K. Popp
Eliminating closure in mineral formulae with specific application to amphiboles    790
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Paolo Orlandi, Marco Pasero, Giuseppe Duchi, and Filippo Olmi
Dessauite, (Sr,Pb)(Y,U)(Ti,Fe³⁺)₂₀O₃₈, a new mineral of the crichtonite group from Buca della Vena mine, Tuscany, Italy    807
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Ignasi Queralt, Ramon Juliá, Feliciano Plana, and James L. Bischoff
A hydrous Ca-bearing magnesium carbonate from playa lake sediments, Salines Lake, Spain    812
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NEW MINERAL NAMES    820

John L. Jambor, Edward S. Grew, and Andrew C. Roberts
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PRESENTATION OF AWARDS FOR 1996

B. Ronald Frost
Presentation of the Roebling Medal of the Mineralogical Society of America for 1996 to Donald H. Lindsley    824
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Donald H. Lindsley
Acceptance of the Roebling Medal of the Mineralogical Society of America for 1996    826
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David Virgo
Presentation of the Mineralogical Society of America Award for 1996 to Donald B. Dingwell    829
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Donald Bruce Dingwell
Acceptance of the Mineralogical Society of America Award for 1996     831
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L.J. Patrick Muffler
Presentation of the Distinguished Public Service Medal for 1996 to Robert I. Tilling     833
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Robert I. Tilling
Acceptance of the Distinguished Public Service Medal for 1996    834
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LETTER

R.J. Angel
Transformation of fivefold-coordinated silicon to octahedral silicon in calcium silicate, CaSi₂O₅     836
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BOOK REVIEW    840

Stephen Guggenheim
CRYSTALLOGRAPHY, second edition. By W. Borchardt-Ott Springer, Berlin, Germany, 1995. 307 pages
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