منابع مشابه
Psd-xrd Modal Mineralogy of Cm Chondrites Spanning the Complete Petrographic Range
Introduction: CM carbonaceous chondrites are samples of incompletely serpentinized fragments of primitive asteroids. These meteorites preserve a record of nebular and parent body processes. CMs are composed predominantly of high temperature anhydrous phases and low temperature serpentine family phyllosilicates. Modal data allows for a greater understanding of CM petrogenesis and for characteriz...
متن کاملOptical Mineralogy
II. Polarizing light microscope and geological samples III. Refractive index and its measurement IV. Optical classes-indicatrix theory V. Relationship of optical properties to crystal chemistry VI. Advanced methods in optical mineralogy GLOSSARY anisotropic mineral: A mineral with more than one principal refractive index. birefringence: The mathematical difference between the largest and smalle...
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Over the past fifty years the mineralogy and crystal chemistry of the materials called asbestos have been refined leading to better identification through new and more sensitive techniques. The health aspects of the exposure to fibrous inorganic species are also equally well determined from the anatomical to the biochemical levels. Integrating the efforts of many researchers from a diversity of...
متن کاملMineralogy of Asteroids
The past decade has seen a significant expansion both in the interpretive methodologies used to extract mineralogical information from asteroid spectra and other remote-sensing data and in the number of asteroids for which mineralogical characterizations exist. Robust mineralogical characterizations now exist for more than 40 asteroids, an order a magnitude increase since Asteroids II was publi...
متن کاملProgress in mineralogy
SUMMAaY. The Mineralogical Society celebrated its 5oth Anniversary in I926; this address attempts to summarize the substantial developments in the subject over the past 5o years and looks ahead to the future. Up to 1926, only the techniques of goniometry, optical investigation of non-opaques, and classical chemical analysis had been fully exploited. X-ray crystallography, though already I4 year...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1956
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed033p196.1