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The reaction between phlogopite and calcium chloride at elevated temperatures
Author(s) -
Aitta Eero,
Leskelä Markku,
Moilanen Jarmo,
Jyrkäs Kauko
Publication year - 1987
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280370202
Subject(s) - phlogopite , mica , potassium , melting point , chemistry , analytical chemistry (journal) , infrared spectroscopy , chemical reaction , scanning electron microscope , chloride , inorganic chemistry , materials science , nuclear chemistry , mineralogy , metallurgy , organic chemistry , paleontology , mantle (geology) , composite material , biology
The reaction of phlogopite mica and CaCl 2 ·2H 2 O has been studied within the temperature range 600–1000°C. The reaction products have been studied by chemical analysis, electron microscopy combined with a micro‐analyser, X‐ray diffraction (XRD), thermoanalytical methods and IR spectrometry. The reaction products were milled and the elemental distribution in different particle size fractions was investigated. Potassium can be converted into a water‐soluble form almost completely above the melting point of CaCl 2 in this reaction. Iron, Mg and Al do not change into a soluble form. On grinding, Fe and K concentrate in smaller particles while Al prefers larger ones. The formation of several new phases in the reaction can be confirmed by XRD. The mica dehydroxylates above 700°C, which can be detected in the IR spectra, and this may affect the reaction.