MINERALOGY IN JAPAN

Progress 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...

Optical 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...

Mineralogy in the Martian Hydrosphere

Introduction: Mineral equilibria provide predic-tors of properties important in aqueous geochemistry (solubility, freezing, precipitation, dissolution, etc.). Prediction works well where groundwater is well above freezing, but less so where only thin films of cold water and ice are present. Calculations are also limited where water/rock ratios are small, the general case on Mars. On Mars many m...

Modern Xrd Methods in Mineralogy

Mineralogy of Asbestos Minerals

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...