Open AccessA new compound of the (K,Na)3Ca8Si6[Si4O12]3 charoite substrate
Author(s) -
A. A. Kashaev,
Л. А. Иванова,
V. Ja. Medvedev,
Z. F. Uschapovskaya
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524844464-467
Subject(s) - radical , octahedron , crystallography , substrate (aquarium) , chemistry , stereochemistry , silicon , materials science , crystal structure , geology , organic chemistry , oceanography
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.