225

Synthesis and crystal structure of Li_0.52Mg_0.96Sc_0.52Si₂O₆ orthopyroxene
Hexiong Yang and Robert T. Downs

229

Thermochemistry and high-pressure equilibria of the post-perovskite phase transition in CaIrO₃
Hiroshi Kojitani, Asuka Furukawa, and Masaki Akaogi

1

Mid-infrared emission spectroscopy of sulfate and sulfate-bearing minerals
Melissa D. Lane

19

An experimental study of the replacement of leucite by analcime
Christine V. Putnis, Thorsten Geisler, Peter Schmid-Beurmann, Thomas Stephan, and Ciriaco Giampaolo

27

Structural refinement and crystal chemistry of Mn-doped spinel: A case for tetrahedrally coordinated Mn³⁺ in an oxygen-based structure
Ferdinando Bosi, Ulf Hålenius, Giovanni B. Andreozzi, Henrik Skogby, and Sergio Lucchesi

34

²⁷Al and ²³Na NMR spectroscopy and structural modeling of aluminofluoride minerals
Bing Zhou, Barbara L. Sherriff, J. Stephen Hartman, and Gang Wu

44

Speciation of Fe in silicate glasses and melts by in-situ XANES spectroscopy
Max Wilke, François Farges, Georg M. Partzsch, Christian Schmidt, and Harald Behrens

57

First in situ X-ray identification of coesite and retrograde quartz on a glass thin section of an ultrahigh-pressure metamorphic rock and their crystal structure details
Daijo Ikuta, Naoyuki Kawame, Shohei Banno, Takao Hirajima, Kazuhiko Ito, John F. Rakovan, Robert T. Downs, and Osamu Tamada

64

High-resolution transmission electron microscopy (HRTEM) investigation of antigorite polysomes (m = 15 to 18)
Gian Carlo Capitani and Marcello Mellini

72

Manganese valence imaging in Mn minerals at the nanoscale using STEM-EELS
Diana B. Loomer, Tom A. Al, Louise Weaver, and Steven Cogswell

80

The crystal chemistry of welshite, a non-centrosymmetric (P1) aenigmatite-sapphirinesurinamite group mineral
Edward S. Grew, Jacques Barbier, Jim Britten, Ulf Hålenius, and Charles K. Shearer

91

Synchrotron powder X-ray diffraction study of the structure and dehydration behavior of sepiolite
Jeffrey E. Post, David L. Bish, and Peter J. Heaney

98

Ab-initio thermal physics and Cr-isotopic fractionation of MgCr₂O₄
Giulio Ottonello, Bartolomeo Civalleri, Marino Vetuschi Zuccolini, and Claudio Marcelo Zicovich-Wilson

109

Single-crystal elastic properties of Ca_0.07Mg_1.93Si₂O₆ orthopyroxene
Jean-Philippe Perrillat, Fabrizio Nestola, Stanislav V. Sinogeikin, and Jay D. Bass

114

The density and compressibility of KAlSi₃O₈ liquid to 6.5 GPa
Rebecca A. Lange

124

An evaluation of synthetic fluid inclusions for the purpose of trapping equilibrated, coexisting, immiscible fluid phases at magmatic conditions
Adam C. Simon, Mark R. Frank, Thomas Pettke, Philip A. Candela, Philip M. Piccoli, Christoph A. Heinrich, and Michael Glascock

139

Reversed phase equilibrium constraints on the stability of Mg-Fe-Al biotite
R.G. Berman, L. Ya. Aranovich, D.G. Rancourt, and P.h.J. Mercier

151

Crystal-chemistry of synthetic K-feldspar-buddingtonite and muscovite-tobelite solid solutions
Birgit Pöter, Matthias Gottschalk, and Wilhelm Heinrich

166

Compressibility and pressure-induced amorphization of guest-free melanophlogite: An in-situ synchrotron X-ray diffraction study
Hongwu Xu, Jianzhong Zhang, Yusheng Zhao, George D. Guthrie, Donald D. Hickmott, and Alexandra Navrotsky

174

Effect of cation ordering and pressure on spinel elasticity by ab initio simulation
Li Li, Philippe Carrez, and Donald Weidner

179

Structure of mixed-layer kaolinite-smectite and smectite-to-kaolinite transformation mechanism from synthesis experiments
Teresa Dudek, Javier Cuadros, and Javier Huertas

193

Crystal structure of tooeleite, Fe₆(AsO₃)₄SO₄(OH)₄·4H₂O, a new iron arsenite oxyhydroxysulfate mineral relevant to acid mine drainage
Guillaume Morin, Gwenaelle Rousse, and Erik Elkaim

198

Zincalstibite, a new mineral, and cualstibite: Crystal chemical and structural relationships
Elena Bonaccorsi, Stefano Merlino, and Paolo Orlandi

204

New chemical and physical data on keilite from the Zaklodzie enstatite achondrite
Lukasz Karwowski, Ryszard Kryza, and Tadeusz A. Przylibski

210

Constraining ¹⁷O and ²⁷Al NMR spectra of high-pressure crystals and glasses: New data for jadeite, pyrope, grossular, and mullite
Kimberly E. Kelsey, Jonathan F. Stebbins, Lin-shu Du, and Ben Hankins

217

Generation history of carbonado inferred from photoluminescence spectra, cathodoluminescence imaging, and carbon-isotopic composition
Hiroyuki Kagi, Shuichi Sato, Tasuku Akagi, and Hisao Kanda

232

ERRATUM: Crystallographic alignments in a coccolith (Pleurochrysis carterae) revealed by electron back-scattered diffraction (EBSD) by Kazuko Saruwatari, Noriaki Ozaki, Hiromichi Nagasawa, and Toshihiro Kogure (vol. 91, 1937-1940, 2006; erratum DOI: 10.2138/am.2007.486)