蓝晶石
成分Al2〔SiO4〕O。与红柱石、矽线石均为Al2SiO5的同质多象变体。常含铁。三斜晶系。晶体常呈扁平柱状。蓝或蓝灰色。玻璃光泽，解理面呈珍珠光泽。在｛100｝晶面上平行晶体延长方向的硬度为4.5，而垂直晶体延长方向的硬度则为6.5～7，差异显著，故有二硬石之称。解理平行｛100｝完全，｛010｝中等。密度3.56～3.68克/厘米3。产于区域变质的结晶片岩中，为粘土质岩石经区域变质作用形成。蓝晶石在1300℃高温下分解成为富铝红柱石，后者是高级耐火材料。色泽艳美的蓝晶石可作宝石。
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Contributor
contributed at 2011-09-28
Classification(s)
●
Earth System(in Chinese) Mineralogy
Detailed Description
| English |
|---|
| Name | cyanite,kyanite |
| Chinese |
|---|
| Name | 蓝晶石 |
| Description | 成分Al2〔SiO4〕O。与红柱石、矽线石均为Al2SiO5的同质多象变体。常含铁。三斜晶系。晶体常呈扁平柱状。蓝或蓝灰色。玻璃光泽，解理面呈珍珠光泽。在｛100｝晶面上平行晶体延长方向的硬度为4.5，而垂直晶体延长方向的硬度则为6.5～7，差异显著，故有二硬石之称。解理平行｛100｝完全，｛010｝中等。密度3.56～3.68克/厘米3。产于区域变质的结晶片岩中，为粘土质岩石经区域变质作用形成。蓝晶石在1300℃高温下分解成为富铝红柱石，后者是高级耐火材料。色泽艳美的蓝晶石可作宝石。 |
How to Cite
NNU_Group (2011). 蓝晶石, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/90226051-5a66-4465-aba5-2c57a59b0aea
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