Abstract

This paper presents the results of mineralogical and crystallographic studies in the first Russian finding of a mineral belonging to the fluoride class, viz., knasibfite, which was found in fumarolic deposits discharged during the Great Tolbachik Fissure Eruption. We investigated its crystal structure to corroborate the fact that knasibfite is orthorhombic, sp. gr. Imm2; a = 17.181 (2), b = 5.537 (4), c = 9.205 (7) Å, V = 875 (1) ų. The structural features that can be seen in this mineral classify it as belonging to a special group of compounds that has inherited its structure from a high temperature modification or from the medium where it crystallized.

中文翻译：

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在堪察加的托尔巴奇克火山上发现矿物Knasibfite K 3 Na 4（SiF 6）3（BF 4）及其晶体结构细节

摘要

本文介绍了俄罗斯在第一个发现的氟化物类矿物中的矿物学和晶体学研究的结果，即一种矿物，名为knasibfite，该矿物是在大托尔巴奇克裂隙喷发期间排出的富马酸盐矿床中发现的。我们研究了其晶体结构，以证实knasibfite是正交晶体sp。的事实。gr。Imm 2; 一个= 17.181（2），b = 5.537（4），C ^ = 9.205（7），V = 875（1）埃³。在这种矿物中可以看到的结构特征将其归类为属于特殊化合物的一组化合物，这些化合物从高温改性或从其结晶的介质继承了其结构。