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- Title
A New Compound of the (K,Na)<sub>3</sub>Ca<sub>8</sub>Si<sub>6</sub>[Si<sub>4</sub>O<sub>12</sub>]<sub>3</sub> Charoite Substrate.
- Authors
Kashaev, A. A.; Ivanova, L. A.; Medvedev, V. Ja.; Uschapovskaya, Z. F.
- 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) Ǻ, 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.
- Subjects
CHAROITE; ROCK-forming minerals; LAMPROPHYRES; CRYSTALLIZATION; GRAPHITE crystallography
- Publication
Doklady Earth Sciences, 2019, Vol 484, Issue 2, p160
- ISSN
1028-334X
- Publication type
Article
- DOI
10.1134/S1028334X1902003X