A new compound of the (K,Na)3Ca8Si6[Si4O12]3 charoite substrate

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Abstract


As a result of experimental studies on the interaction between a charoite substrate and host lamprophyres of microcline-arfvedsonitic composition, a new (K,Na)3Ca8Si6[Si4O12]3 compound has been obtained with a new type of radical Si2[Si4O12] found in its crystalline structure а = 15.2613 (3) Å, I2/13, Z = 4. The chain-shaped Ca-octahedra connected through common faces encircle a radical and close in a K-octagon. In contrast to charoite with banded-tube radicals, an isometrically-island silicon radical is identified.


About the authors

A. A. Kashaev

Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences

Author for correspondence.
Email: liva@crust.irk.ru

Russian Federation, 128, Lermontova street, Irkutsk, 664033

L. A. Ivanova

Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences

Email: liva@crust.irk.ru

Russian Federation, 128, Lermontova street, Irkutsk, 664033

V. Ja. Medvedev

Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences

Email: liva@crust.irk.ru

Russian Federation, 128, Lermontova street, Irkutsk, 664033

Z. F. Uschapovskaya

Institute of the Earth`s Crust of the Siberian Branch of the Russian Academy of Sciences

Email: liva@crust.irk.ru

Russian Federation, 128, Lermontova street, Irkutsk, 664033

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