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矽線石

矽线石
基本資料
類別島矽酸鹽礦物
化学式Al2SiO5
IMA記號Sil[1]
施特龙茨分类9.AF.05
戴納礦物分類52.02.02a.01
晶体分类雙錐體 (mmm)
H-M記號: (2/m 2/m 2/m)
晶体空间群Pbnm
性質
分子量162.04 g·mol−1
顏色白色、棕色、綠色
晶系正交晶系
解理{010} 完全
断口梯狀斷口
韌性/脆性韌性
莫氏硬度7
光澤玻璃光澤至次金剛光澤、絹絲光澤
條痕白色
透明性透明至半透明
比重3.24
光學性質雙軸 (+)
折射率nα = 1.653 - 1.661 nβ = 1.654 - 1.670 nγ = 1.669 - 1.684
双折射δ = 0.020 - 0.022
2V夹角21 - 30°
參考文獻[2][3]
Al2SiO5矽酸鋁)的相圖[4]
矽线石切

矽线石(英語:Sillimanite)是一種鋁矽酸鹽,化學式是Al2SiO5。矽線石的命名是為了紀念美國化學家班傑明·西利曼(Benjamin Silliman, 1779-1864)[2]

矽线石见于火成岩与富铝岩石的接触带或结晶片中。是很好的耐火材料。

產狀

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矽線石是三種鋁矽酸鹽異構物之一,另外二種是紅柱石藍晶石。矽線石有一種常見變種細矽線石。矽線石和細矽線石通常出現在經過變質作用的沉積岩。同時,矽線石是高度變質作用的指標礦物

参见

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參考資料

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  1. ^ Warr, L.N. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 2021, 85 (3): 291–320. Bibcode:2021MinM...85..291W. S2CID 235729616. doi:10.1180/mgm.2021.43可免费查阅. 
  2. ^ 2.0 2.1 http://www.mindat.org/min-3662.html页面存档备份,存于互联网档案馆) Mindat.org
  3. ^ WebMineral entry. [2009-12-19]. (原始内容存档于2006-11-12). 
  4. ^ Whitney, D.L. Coexisting andalusite, kyanite, and sillimanite: Sequential formation of three Al2SiO5 polymorphs during progressive metamorphism near the triple point, Sivrihisar, Turkey. American Mineralogist. 2002, 87 (4): 405–416. doi:10.2138/am-2002-0404. 
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矽線石
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