On the conditions of the formation of cancrisilite Na7(Al5Si7O24)(CO3) · 3H2O and «hydroxycancrinite» Na6(Al6Si6O24) · 4H2O (on the basis of data on synthesis)

Q4 Earth and Planetary Sciences

Zapiski Rossiiskogo Mineralogicheskogo Obshchestva Pub Date : 2019-11-01 DOI:10.30695/zrmo/2019.1485.08

N. Chukanov, Чуканов Никита Владимирович, A. R. Kotel’nikov, Котельников Алексей Рэдович, I. Pekov, Пеков Игорь Викторович, K. Van, Ван Константин Владимирович

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引用次数: 2

Abstract

Aluminosilicates with a cancrinite-type structure compositionally related to cancrisilite and a Ca-free and CO 3 — deficient cancrinite analogue were synthesized and characterized by electron microprobe and HCN-analyses, IR spectroscopy, and powder X-ray diffraction. The empirical formulae of the compounds obtained are H 0.05 Na 6.13 [Al 4.36 Si 7.64 O 24 ](CO 3 ) 0.91 · 2.85H 2 O and H 0.07 Na 6.19 [Al 5.53 Si 6.47 O 24 ]· ·(CO 3 ) 0.365 · 3.915H 2 O, respectively. The latter compound is characterized by disordered chains (···Na···H 2 O) ∞ in the narrow channel and a high content of H 2 O in the wide channel. The conditions for the formation of cancrisilite and carbonate-deficient cancrinite varieties in nature are discussed. It was concluded that supercritical conditions and ultra-agpitic environment contribute to crystallization of cancrisilite.

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癌辉石Na7(Al5Si7O24)(CO3)·3H2O和“羟基癌辉石”Na6(Al6Si6O24)·4H2O的形成条件(基于合成数据)

合成了一种与癌辉石和一种无ca和缺乏CO 3的癌辉石类似物结构相似的铝硅酸盐，并用电子探针、hcn分析、红外光谱和粉末x射线衍射对其进行了表征。所得化合物的实验式分别为:h0.05 Na 6.13 [Al 4.36 Si 7.64 O 24](CO 3) 0.91·2.85 h2o和h0.07 Na 6.19 [Al 5.53 Si 6.47 O 24]··(CO 3) 0.365·3.915 h2o。后一种化合物的特点是在窄通道中具有无序链(··Na···h2o)∞，在宽通道中具有高h2o含量。讨论了自然界中癌辉岩和缺碳酸盐癌辉岩的形成条件。结论认为，超临界条件和超湿化环境有助于癌辉石的结晶。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Zapiski Rossiiskogo Mineralogicheskogo Obshchestva Earth and Planetary Sciences-Economic Geology

CiteScore

1.30

自引率

0.00%

发文量