Published by De Gruyter

Volume 84 Issue 5-6

Issue of American Mineralogist

Contents
Journal Overview

Publicly Available November 13, 2015

Preface to the Gene Foord issue

High-temperature heat capacity of grossular (Ca₃Al₂Si₃O₁₂), enstatite (MgSiO₃), and titanite (CaTiSiO₅)

Crystals of BaSi 4 O 9 synthesized at 4 GPa and 1000 ℃ were determined to be isostructural with barium tetragermanate [trigonal, space group P3, a =11.2469(11) and c = 4.4851(6) Å, V= 491.3(1) Å 3 ]. The structure (R = 2.4%) features a corner-linked framework of three-member silicate tetrahedral rings, which are cross-linked by isolated silicate octahedra. Ba cations occupy tenfold-coordinated sites in channels defined by the silicate framework. This structure is 4.2% denser than the topologically similar benitoite form of high-pressure BaSi 4 O 9 , which was produced by grinding the barium tetragermanate-type crystals described in this report.

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Objective
American Mineralogist: Journal of Earth and Planetary Materials (Am Min), is the flagship journal of the Mineralogical Society of America (MSA), continuously published since 1916. Am Min is home to some of the most important advances in the Earth Sciences. Our mission is a continuance of this heritage: to provide readers with reports on original scientific research, both fundamental and applied, with far reaching implications and far ranging appeal. Topics of interest cover all aspects of planetary evolution, and biological and atmospheric processes mediated by solid-state phenomena. These include, but are not limited to, mineralogy and crystallography, high- and low-temperature geochemistry, petrology, geofluids, bio-geochemistry, bio-mineralogy, synthetic materials of relevance to the Earth and planetary sciences, and breakthroughs in analytical methods of any of the aforementioned.

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Topics

Planetary evolution
Biological and atmospheric processes mediated by solid-state phenomena
Mineralogy
Crystal chemistry
High- and low-temperature geochemistry
Biomineralization
Geofluids
Bio-geochemistry
Bio-mineralogy
Synthetic materials
Mineral Physics
Crystallography
Crystal structure
Martian rock and soil
Raman spectroscopy
Petrology
Planetary materials
Infrared spectroscopy

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Volume 84 Issue 5-6

Issue of American Mineralogist

Preface to the Gene Foord issue

The chemistry, mineralogy, and petrology of the George Ashley Block pegmatite body

Abstract

Cooling rates and crystallization dynamics of shallow level pegmatite-aplite dikes, San Diego County, California

Abstract

Crystal growth mechanisms in miarolitic cavities in the Lake George ring complex and vicinity, Colorado

Abstract

Ising models of undercooled binary system crystallization: Comparison with experimental and pegmatite textures

Abstract

Solubility and stability of beryl in granitic melts

Abstract

Reconnaissance fluid inclusion study of the Morefield pegmatite, Amelia County, Virginia

Abstract

Niobian rutile from the McGuire granitic pegmatite, Park County, Colorado: Solid solution, exsolution, and oxidation

Abstract

The crystal chemistry of sogdianite, a milarite-group mineral

Abstract

Simmonsite, Na2LiAlF6, a new mineral from the Zapot amazonite-topazzinnwaldite pegmatite, Hawthorne, Nevada, U.S.A.

Abstract

Ferrotitanowodginite, Fe2+TiTa2O8, a new mineral of the wodginite group from the San Elías pegmatite, San Luis, Argentina

Abstract

Crystal-structure refinement of a rubidian cesian phlogopite

Abstract

Chemical and paragenetic data on gadolinite-group minerals from Baveno and Cuasso al Monte, southern Alps, Italy

Abstract

Memorial of Eugene Edward Foord, 1946–1998

Tourmaline-rich pseudomorphs in sillimanite zone metapelites: Demarcation of an infiltration front

Abstract

KREEP cumulates in the western lunar highlands: Ion and electron microprobe study of alkali-suite anorthosites and norites from Apollo 12 and 14

Abstract

Geochemistry, petrology, and cooling history of 14161,7373: A plutonic lunar sample with textural evidence of granitic-fraction separation by silicate-liquid immiscibility

Abstract

Crystal-chemical controls on trace element partitioning between garnet and anhydrous silicate melt

Abstract

High-temperature heat capacity of grossular (Ca3Al2Si3O12), enstatite (MgSiO3), and titanite (CaTiSiO5)

High-pressure equation of state of magnesite: New data and a reappraisal

Abstract

Comparative compressibilities of calcite-structure carbonates: Deviations from empirical relations

Abstract

Formation of rutile nuclei at anatase {112} twin interfaces and the phase transformation mechanism in nanocrystalline titania

Abstract

Theoretical studies on the formation of mercury complexes in solution and the dissolution and reactions of cinnabar

Abstract

Aspects of goethite surface microtopography, structure, chemistry, and reactivity

Abstract

In situ study of the goethite-hematite phase transformation by real time synchrotron powder diffraction

Abstract

In situ powder neutron diffraction of cation partitioning vs. pressure in Mg0.94Al2.04O4 synthetic spinel

Abstract

Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals

Abstract

Linking structure and chemistry in the Schorl-Dravite series

Abstract

On the crystal structure of pseudowollastonite (CaSiO3)

Abstract

Al-Fe disorder in synthetic epidotes: A single-crystal X-ray diffraction study

Abstract

The degree of aluminum avoidance in aluminosilicate glasses

Abstract

Bonding in silicates: Investigation of the Si L2,3 edge by parallel electron energy-loss spectroscopy

Abstract

Location of interstitial Cr in mullite by incoherent channeling patterns from characteristic X-ray emission

Abstract

Raman spectra and vibrational analysis of the trioctahedral mica phlogopite

Abstract

The occurrence of preiswerkite in a tourmaline-biotite-scapolite rock from Blengsvatn, Norway

Abstract

Letters. Al-O-Al oxygen sites in crystalline aluminates and aluminosilicate glasses: High-resolution oxygen-17 NMR results

Abstract

Crystal chemistry of high-pressure BaSi4O9 in the trigonal (P3) barium tetragermanate structure

Abstract

Simmonsite, Na₂LiAlF₆, a new mineral from the Zapot amazonite-topazzinnwaldite pegmatite, Hawthorne, Nevada, U.S.A.

Ferrotitanowodginite, Fe²⁺TiTa₂O₈, a new mineral of the wodginite group from the San Elías pegmatite, San Luis, Argentina

High-temperature heat capacity of grossular (Ca₃Al₂Si₃O₁₂), enstatite (MgSiO₃), and titanite (CaTiSiO₅)

In situ powder neutron diffraction of cation partitioning vs. pressure in Mg_0.94Al_2.04O₄ synthetic spinel

On the crystal structure of pseudowollastonite (CaSiO₃)

Bonding in silicates: Investigation of the Si L_2,3 edge by parallel electron energy-loss spectroscopy

Crystal chemistry of high-pressure BaSi₄O₉ in the trigonal (P3) barium tetragermanate structure