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THE CONDITIONS OF PHLOGOPITE-MARGARITE-BERYL MINERALIZATION
International Geology Review, 1985I. I. Kupriyanova, S. V. Sokolov
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The thermodynamic properties of natural margarite
Russian Journal of Physical Chemistry A, 2009Thermal, IR spectroscopic, and thermochemical studies of natural brittle mica, margarite Ca1.00Na0.10Mg0.02Al3.89Fe0.013+Si2.03Ti0.01O10(OH)1.74F0.26, were performed. The enthalpy of formation of natural margarite from the elements (−6269 ± 12 kJ/mol) was determined by melt solution calorimetry on a high-temperature heat-conducting Calvet ...
L. P. Ogorodova +2 more
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Dalradian margarite: a preliminary note
Geological Magazine, 1974SummaryMargarite occurs in quartz-bearing Dalradian graphitic schists both as a primary phase and as an alteration product of kyanite. The disposition of alteration products in these rocks demonstrates clearly the role of an externally imposed gas phase in determining margarite development.
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The stability and natural occurrence of margarite
Mineralogical Magazine, 1971SummaryThe upper stability of margarite has been determined to be 450 °C at 1 kb and 530 °C at 2 kb total pressure (PH2O = Ptotal). Other experiments delimit in a general way the lower stability of this mineral and its paragenesis in more SiO2 rich compositions.
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