Amazonite from the alkali granite of the Avdar Massif, Mongolia

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Dec 1981 English Publisher:Springer Science and Business Media LLCJournal:TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, volume 28, pages 277-283 (issn: 0041-3763, eissn: 1438-1168,

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Authors: E. Pivec; J. Ševčik; J. Ulrych;

doi: 10.1007/bf01081855

Amazonite from the alkali granite of the Avdar Massif, Mongolia

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Abstract

The green feldspar in alkali granite from the Avdar deposit of decoration stone (150 km W of Ulan-Bator) has been identified by means of physical and chemical methods as amazonite. Its structural state corresponds to that of microcline with a high degree of triclinicity and displaying the following anomalous dimensions of the unit cell (nm):a=0.8568,b=1.2967,c=0.7217 nm, α=90.732, β=115.851, γ=87.702°;V=0.72115 nm3.

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Czechoslovak Academy of Sciences
Czech Republic

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