American Mineralogist
LETTER
241 LETTER Structural phase transitions of tridymite: A 29Si MAS NMR investigation
REGULAR ARTICLE
1 ARTICLES Mössbauer absorber thicknesses for accurate site populations in Fe-bearing minerals
8 Local electronic states of Fe2+ ions in orthopyroxene
16 Theoretical studies of the speciation of Al in F-bearing aluminosilicate glasses
23 Tremolite-richterite amphiboles: Synthesis, compositional and structural characterization, and thermochemistry
36 Textural and chemical changes undergone by zircon during the Pb-evaporation technique
42 A Raman spectral study of forsterite-monticellite solid solutions
49 EPR-determined site distributions of low concentrations of transition-metal ions in minerals: Review and predictions
56 Staurolite end-member molar volumes determined from unit-cell measurements of natural specimens
68 Oriented chlorite lamellae in chromite from the Pedra Branca Mafic-Ultramafic Complex, Ceara, Brazil
75 High-resolution transmission electron microscopy of polysomatism and stacking defects in antigorite
85 The distribution of Ag and Sb in galena: Inclusions versus solid solution
96 Submicroscopic exsolution in Mn-bearing alkali amphiboles from Tirodi, Maharashtra, India
107 The applicability of least squares in the extraction of thermodynamic data from experimentally bracketed mineral equilibria
113 Octahedral excess mixing properties in biotite: A working model with applications to geobarometry and geothermometry
132 Melting experiments on a SiO2-poor, CaO-rich aphanitic kimberlite from 5-10 GPa and their bearing on sources of kimberlite magmas
143 Plagioclase zoning in mid-Pleistocene lavas from the Seguam volcanic center, central Aleutian arc, Alaska
158 Disequilibrium decomposition and breakdown of muscovite in high P-T gneisses, Betic alpine belt (southern Spain)
178 Activity-composition relationships in the system Fe-Pt at 1300 and 1400 °C and at 1 atm and 20 kbar
187 Tolbachite, CuCl2, the first example of Cu2+ octahedrally coordinated by Cl-
190 Ribbeite, a second example of edge-sharing silicate tetrahedra in the leucophoenicite group
195 Cation occupancies in serendibite: A crystal structure study Deposit Items
204 Holotype buddingtonite: An ammonium feldspar without zeolitic H2O
210 Mechanisms and kinetics of apatite fission-track annealing—Discussion
213 Mechanisms and kinetics of apatite fission-track annealing—Reply to Kevin D. Crowley
216 CH4-rich inclusions from quartz veins in the Valley-and-Ridge province and the anthracite fields of the Pennsylvania Appalachians—Discussion
220 CH4-rich inclusions from quartz veins in the Valley-and-Ridge province and the anthracite fields of the Pennsylvania Appalachians—Reply
225 Analcime phenocrysts in igneous rocks: Primary or secondary?—Discussion
230 Analcime phenocrysts in igneous rocks: Primary or secondary?—Reply
NEW MINERAL NAMES
233 NEW MINERAL NAMES
MEMORIAL
239 MEMORIAL Memorial of Katharine Mather, 1916-1991
DEPOSIT ITEMS
195 Cation Occupancies in serendibite: A crystal structure study, American Mineralogist 1993
195 Cation Occupancies in serendibite: A crystal structure study, American Mineralogist 1993
195 Cation Occupancies in serendibite: A crystal structure study, American Mineralogist 1993
195 Cation Occupancies in serendibite: A crystal structure study, American Mineralogist 1993
TABLE OF CONTENTS
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SPECIAL COLLECTIONS
Table of Contents
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Special Collections
American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.