Chromium: Its Physicochemical Behavior and Petrologic Significance - 1st Edition - ISBN: 9780080199542, 9781483187761

Chromium: Its Physicochemical Behavior and Petrologic Significance

1st Edition

Papers from a Carnegie Institution of Washington Conference, Geophysical Laboratory

Editors: T. N. Irvine
eBook ISBN: 9781483187761
Imprint: Pergamon
Published Date: 1st January 1976
Page Count: 299
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Description

Chromium: Its Physicochemical Behavior and Petrologic Significance is a collection of papers presented at an interdisciplinary conference on the physicochemical behavior and petrologic significance of chromium, held at the Geophysical Laboratory of the Carnegie Institution of Washington on January 7-8, 1974. Contributors explore the physicochemical behavior and petrologic significance of chromium and cover a wide range of topics, including the mineralogy of chromium and thermochemistry of chromium compounds.

Comprised of 23 chapters, this book begins with a discussion on phase relations in chromium oxide-containing systems at elevated temperatures, followed by an analysis of the chromium-oxygen system at high oxygen pressures. Subsequent chapters focus on crystal field effects in chromium and its partitioning in the mantle; trivalent and divalent chromium ions in spinels; distribution and significance of chromium in meteorites; and chrome-spinel in progressive metamorphism. The paragenesis of zoned chromite from central Manitoba is also considered, along with postcumulus and subsolidus equilibration of chromite and coexisting silicates in the Eastern Bush veld Complex. The final chapter presents a hypothesis of origin for podiform chromite deposits.

This monograph will be of interest to physicists, chemists, and geologists.

Table of Contents


Foreword

Phase Relations in Chromium Oxide-Containing Systems at Elevated Temperatures

The System Chromium-Oxygen at High Oxygen Pressures

Thermochemistry of Chromium Compounds, Especially Oxides at High Temperature

Solid Oxide Electrolyte Emf Cell Determination of the Standard Free Energy of Cr2O3 and Applications to Chromiumbearing

Mineral Systems

Preparation of Cr2O3 Crucibles and the Defect Structure of Cr2O3

Smelting Chrome Ore

Crystal Field Effects in Chromium and its Partitioning in the Mantle

Crystal-Field Effects in Spinel: Oxidation States of Iron and Chromium

Trivalent and Divalent Chromium Ions in Spinels

Magnetic Properties of Chromium Chalcogenide Spinels

Magnetochemical Characterization of Fe(FexCr2—x)O4 Spinels

Mineralogy of Chromium

Distribution and Significance of Chromium in Meteorites

Chromium and the Genesis of Diamond

Chromite Spinels from Ultramafic Xenoliths

Coexisting Spinel and Silicates in Alpine Peridotites of the Granulite Facies

Chrome-Spinel in Progressive Metamorphism—a Preliminary Analysis

The Paragenesis of Zoned Chromite from Central Manitoba

Crystallization Sequences in the Muskox Intrusion and Other Layered Intrusions—II. Origin of Chromitite Layers and Similar Deposits of Other Magmatic Ores

Postcumulus and Subsolidus Equilibration of Chromite and Coexisting Silicates in the Eastern Bushveld Complex

Reaction Trends Shown by Chrome-Spinels of the Rhum Layered Intrusion

A comparison of Chrome-Spinels in Ophiolites and Mantle Diapirs of Newfoundland

A Hypothesis of Origin for Podiform Chromite Deposits

Details

No. of pages:
299
Language:
English
Copyright:
© Pergamon 1976
Published:
Imprint:
Pergamon
eBook ISBN:
9781483187761

About the Editor

T. N. Irvine

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