透石膏

透石膏(英语:selenite),又称透明石膏,是一种矿物,主要成分为二水合硫酸钙(CaSO4·2H2O)。其英文名源于希腊语selēnitēs (lithos),意思为“来自月亮的石头”。[2]

透石膏
基本資料
類別硫酸盐矿物
化學式CaSO4·2H2O
性質
分子量172.17 u
顏色棕绿、棕黄、绿色、灰绿或灰白
晶体惯态Earthy – Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
晶系单斜 (2/m) 空间群: A2/a
解理[010] 完美, [100] 中等, [011] 中等
斷口Fibrous – Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos).
摩氏硬度2
光澤Pearly
條痕白色
比重2.9
光學性質双轴 (-) 2V=58
折射率nα=1.519-1.521, nβ=1.522-1.523, nγ=1.529-1.53
雙折射δ =0.0090-0.0100
其他特徵non-radioactive, non-magnetic, Fluorescent.
參考文獻[1]

参考文献

  1. . Weinrich Minerals, Inc. [20 October 2013]. (原始内容存档于2020-09-08).
  2. Selenite. Merriam-Webster Dictionary. [2017-11-17]

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