Bulletin de la Société française de Minéralogie et de Cristallographie · 1969 · 19 citations · 0 references
Natural SciencesChemistryGeologyInorganic ChemistryMineralogyPhysical ChemistryMineral ChemistryMineral ClassificationMineral GeochemistryPhase RelationsPhysical Properties Of MineralsSilicate MineralsHigh-temperature Phase RelationsMineral Phase AnalysisMineral Phase EquilibriaMineralogical CompositionSilicate Mineral AssemblagesSilicate Phase EquilibriaTemperature-pressure Phase EquilibriaX-ray Diffraction Analysis
An investigation of compositions between muscovite, KAl₃Si₃O₁₀ (OH)₂ and pyrophyllite Al₂Si₄O₁₀ (OH)₂ was undertaken under hydrothermal conditions of 1, 2 and 3,5 kilobars water pressure and temperatures between 250° C and 440° C. The resulting five silicate phases were identified by X-ray diffraction, electron microscope and cation exchange capacity methods. The study permits the determination of the stability of expandable and mixed-layered phases under various physical and chemical conditions. A brief discussion of possible applications to natural mineral assemblages is made.