منابع مشابه
Computer Simulation Studies of Minerals
Applications of state-of-the-art computer simulations to important Earthand rock-forming minerals (Al2SiO5 polymorphs, albite (NaAlSi3O8), and MgSiO3 perovskite) are described. Detailed introductions to equations of state and elasticity, phase transitions, computer simulations, and geophysical background are given. A new general classification of phase transitions is proposed, providing a natur...
متن کاملIn vitro studies on biological effects of fibrous minerals.
Asbestos substitutes have been used recently in industrial various applications. Since certain asbestos substitutes have similar characteristics of asbestos, they require urgent in vitro and in vivo evaluation of these asbestos substitutes prior to occupational applications. Though in vitro studies do not offer precise assessment of toxicity of the fibers, it is possible to provide useful infor...
متن کاملFIRST REPORT ON PLATINUM-GROUP MINERALS IN CHROMITITES J%OM NORTHWESTERN NEYRIZ OPHIOLITE, IRAN
Electron-probe microanalyses and scanning electron microscopy of chrornitites from some ultramafic members of Neyriz ophiolite indicate that sulifides of platinum- group minerals (PGMs) occur as solid inclusions in chromite grains. Laurite with the general formula of (Ru ,Os ,lr ) S , and erlichmanite are the main identified sulfide phases. The PGMs occur as 4 to 20 microns euhedral to rect...
متن کاملRecommended nomenclature for labuntsovite-group minerals
The present report contains recommendations on the nomenclature of the labuntsovite-group (LG) minerals based on a crystal-structural classification. The labuntsovite group includes hydrous titanium and niobium silicates, both orthorhombic and monoclinic, with a structure characterized by a framework consisting of chains of (Ti,Nb)O-octahedra, linked by four-member rings of Si,O-tetrahedra. Thi...
متن کاملNear-infrared Reflectance Spectra of Mixtures of Kaolin-group Minerals: Use in Clay Mineral Studies
-Near-infrared (NIR) reflectance spectra for mixtures of ordered kaolinite and ordered dickite have been found to simulate the spectral response of disordered kaolinite. The amount of octahedral vacancy disorder in nine disordered kaolinite samples was estimated by comparing the sample spectra to the spectra of reference mixtures. The resulting estimates are consistent with previously published...
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ژورنال
عنوان ژورنال: Journal of the Mineralogical Society of Japan
سال: 1974
ISSN: 1883-7018,0454-1146
DOI: 10.2465/gkk1952.11.special2_63