方钍石
成分(Th,U)O2，含ThO2 70%～80%，含UO2 12%，常含稀土元素和铅。等轴晶系。晶形呈立方体或立方体和八面体的聚形，晶体通常细小，常出现依尖晶石律形成贯穿双晶。暗灰至黑色。条痕深灰色。树脂光泽或半金属光泽。硬度6.5～7。参差状断口。密度8.9～9.8克/厘米3，视放射性蜕变程度的增加而降低。具强放射性。主要产于伟晶岩及高温热液矿床中。也见于砂矿中。是提取钍和铀的矿石矿物。
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contributed at 2011-09-28
Classification(s)
●
Earth System(in Chinese) Mineralogy
Detailed Description
| English |
|---|
| Name | thorianite |
| Chinese |
|---|
| Name | 方钍石 |
| Description | 成分(Th,U)O2，含ThO2 70%～80%，含UO2 12%，常含稀土元素和铅。等轴晶系。晶形呈立方体或立方体和八面体的聚形，晶体通常细小，常出现依尖晶石律形成贯穿双晶。暗灰至黑色。条痕深灰色。树脂光泽或半金属光泽。硬度6.5～7。参差状断口。密度8.9～9.8克/厘米3，视放射性蜕变程度的增加而降低。具强放射性。主要产于伟晶岩及高温热液矿床中。也见于砂矿中。是提取钍和铀的矿石矿物。 |
How to Cite
NNU_Group (2011). 方钍石, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/e7d9a6c0-87b3-4245-bf02-13092f1d3c6e
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