LOW-TEMPERATURE HEAT CAPACITY AND THERMODYNAMIC PROPERTIES OF NATURAL ANNITE

dc.contributor.author	Paukov I.E.
dc.contributor.author	Kovalevskaya Yu.A.
dc.contributor.author	Kiseleva I.A.
dc.contributor.author	Shuriga T.N.
dc.date.accessioned	2024-10-23T07:15:39Z
dc.date.available	2024-10-23T07:15:39Z
dc.date.issued	2006
dc.identifier	https://www.elibrary.ru/item.asp?id=13508510
dc.identifier.citation	Geochemistry International, 2006, 44, 8, 841-845
dc.identifier.issn	0016-7029
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/46099
dc.description.abstract	Annite is an iron-rich trioctahedral mica close in composition to the hypothetical end-member KFe3[Si3AlO10](OH)2. Annite with an ideal composition is known only as a synthetic compound. Natural annites may approach the theoretical composition. Their Fe2+ content is about 2.0–2.5 per formula unit (28–36 wt % FeO), and Fe3+ is up to 0.5 per formula unit. The synthesis experiments of Eugster showed that the stability of annite is a function of temperature, total pressure, and, especially, oxygen fugacity. The knowledge of the thermodynamic properties of annite and other ferriferous biotites with known Fe2+/Fe3+ and Fe/Al ratios together with phase equilibrium experimental data may help elucidate the conditions for the formation of metamorphic and magmatic rocks containing abundant ferriferous biotites.
dc.subject	Annite
dc.title	LOW-TEMPERATURE HEAT CAPACITY AND THERMODYNAMIC PROPERTIES OF NATURAL ANNITE
dc.type	Статья
dc.identifier.doi	10.1134/S001670290608009X

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