新矿物—额尔齐斯石Na₂Si₄O₉

来源期刊：中南大学学报(自然科学版)1986年第1期

论文作者：张如柏 杜崇良 韩凤鸣

文章页码：43 - 47

关键词：伟晶岩矿物； 钠硅酸盐矿物； 等轴晶系

Key words：pegmatite mineral； sodium silicate mineral； cubic system.

摘    要：额尔齐斯石(Ertixiite,Na₂Si₄O₉)是作者近年在新疆阿尔泰可可托海矿山某伟晶岩晶洞中首次发现的一种新的钠硅酸盐矿物。这种矿物的发现,对研究钠硅酸盐矿物在伟晶岩中形成的热力学条件提供了实际资料。

Abstract:

Ertixiite(Na₂Si₄O₉) is a new mineral discovered in the miarolitic cavities of the Altai pegmatite mine, Xinjiang, China, and associated with topaz, apatite, quartz and albite (cleavelandite) and so on. The mineral is white, granular and transparent with a vitreous luster and white streak. HV=570.08—850.69 kg/mm² (Moh’s=5.8-6.5), N=1.502. It is of cubic system with α=5.975A, V=213.311A³, Z=1, and D_X=2.34 g/cm^3. The chemical composition of ertixiite is given as follows (the average of six samples):Na₂O 17.96, CaO 2.82, SiO₂ 77.86, Al₂O₃ 1.45, FeO 0.06, total 100.17. The strongest lines in the X-ray powder pattern are: 3.443(2,111),2.674 (2,210); 1.996(8;221), 1.798(10,311), and 1.493(2,400).