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词汇 uvite
分类 英语词汇 英语翻译词典
释义

uvite

英汉-汉英词典
钙镁电气石
词组 | 习惯用语
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  • invite vt. 邀请,招待;招致 n. 邀请
  • unite vt. 使…混合;使…联合;使…团结 vi. 联合;混合;团结
  • ovate adj. 卵形的;卵圆形的
  • aviate vi. 飞行;驾驶飞机 vt. 用飞机飞行
  • vitiate vt. 损害,弄坏;使无效;污染
uvite n. 钙镁电气石

网络短语:
uvite e 钙镁电气石
英语百科

Fluor-uvite

Fluor-uvite is a tourmaline mineral with the chemical formula CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F. It is a rare mineral that is found in calcium rich contact metamorphic rocks with increased amounts of boron. Uvite is trigonal hexagonal, which means that it has three equal length axes at 120 degrees, all perpendicular to its fourth axis which has a different length. Uvite is part of the space group 3m. Uvite's hardness has been measured to be 7.5 on the Mohs hardness scale. The color of uvite widely varies, depending on the sample, but is mostly deep green or brown. In regards to uvite's optical properties, it is uniaxial (-) and anisotropic, meaning that the velocity of light in the mineral depends on the path that it takes. In plane polarized light, uvite is colorless to pale yellow and shows weak pleochroism.

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