American Mineralogist
REGULAR ARTICLE
1 Darken’s quadratic formalism and the thermodynamics of minerals
12 Compositions of anhydrous and hydrous melts coexisting with plagioclase, augite, and olivine or low-Ca pyroxene from 1 atm to 8 kbar: Application to the Aleutian volcanic center of Atka
29 Hydration of corundum-bearing xenoliths in the Qôrqut Granite Complex, Godthaabsfjord, West Greenland
39 Metamorphic hydrology at 13-km depth and 400-550°C
59 Mineral chemistry and petrogenesis of carbonatite intrusions, Perry and Conway Counties, Arkansas
67 Quartz-fayalite-iron and quartz-fayalite-magnetite equilibria and the free energy of formation of fayalite (Fe2SiO4) and magnetite (Fe3O4)
76 Calibration of the graphite-methane buffer using the ƒH2 sensors at 2-kbar pressure
82 Determination of ionic radii from cation-anion distances in crystal structures
83 Importance of the size of the unit in models of ordering behavior for albite
89 Synchrotron radiation XANES spectroscopy of Ti in minerals: Effects of Ti bonding distances, Ti valence, and site geometry on absorption edge structure
102 A review of Mössbauer data on trioctahedral micas: Evidence for tetrahedral Fe3+ and cation ordering
113 “””Eastonite”” from Easton, Pennsylvania: A mixture of phlogopite and a new form of serpentine”
126 Observations on terrestrial ureyite and ureyitic pyroxene
137 An unusual pyroxene, melilite, and iron oxide mineral assemblage in a coal-fire buchite from Buffalo, Wyoming
148 Chemistry and structure of esseneite (CaFe2+AlSiO6), a new pyroxene produced by pyrometamorphism
157 Petedunnite (CaZnSi2O6), a new zinc clinopyroxene from Franklin, New Jersey, and phase equilibria for zincian pyroxenes
167 Three tridymite structural modifications and cristobalite intergrown in one crystal
170 Fibers of dumortierite in quartz
173 Refinement of the crystal structure of ramsayite (lorenzenite)
178 Solid solution in, and classification of, gossan-derived members of the alunite-jarosite family, northwest Queensland, Australia
188 TEM observations and X-ray crystal-structure refinement of a twinned dolomite with a modulated microstructure
194 Magnetic ordering in Al-rich goethites: Influence of crystallinity
201 Barian tomichite, Ba0.5(As2)0.5Ti2(V,Fe)5O13(OH), its crystal structure and relationship to derbylite and tomichite
209 Crystal structure of the apatite-like compound K3Ca2(SO4)3F
213 Ribbeite, a polymorph of alleghanyite and member of the leucophoenicite group from the Kombat mine, Namibia
217 Wendwilsonite, the Mg analogue of roselite, from Morocco, New Jersey, and Mexico, and new data on roselite
NEW MINERAL NAMES
222 NEW MINERAL NAMES
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American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.