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锂辉石

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锂辉石
產於美國麻薩諸塞州漢普夏郡Walnut Hill偉晶岩礦區的鋰輝石 (尺寸: 14.2 x 9.2 x 3.0 cm)
基本資料
類別鏈矽酸鹽礦物
輝石
化学式LiAl(SiO3)2
IMA記號Spd[1]
施特龙茨分类9.DA.30
戴納礦物分類65.1.4.1
晶体分类棱柱体 (2/m)
(H-M記號相同)
晶体空间群C2/c
晶胞a = 9.46 Å, b = 8.39 Å
c = 5.22 Å
β = 110.17°; Z = 4
性質
分子量186.09 g·mol−1
顏色無色、黃色、淡綠色 、祖母綠色、粉紅至堇紫色、紫色、白色、灰色,有些可能出現兩種顏色
晶体惯态呈棱柱狀通常扁平且細長,有平行於{100}的條紋,塊狀的也很常見
晶系單斜晶系
雙晶常見於{100}
解理(110), (110) 完美
断口參差斷口到次貝殼狀斷口
韌性/脆性脆性
莫氏硬度6.5–7
光澤玻璃光澤,解理的部份呈珍珠光澤
條痕白色
比重3.03–3.23
光學性質雙軸(+)
折射率nα = 1.648–1.661 nβ = 1.655–1.670 nγ = 1.662–1.679
双折射δ = 0.014–0.018
多色性紫鋰輝石: α-粉紅, γ-無色; 翠綠鋰輝石: α-綠色, γ-無色
2V夹角54°- 69°
熔性3.5
其他特徵有些有逆光致變色效應, 貓眼效應
參考文獻[2][3][4][5]

锂辉石是一种含的铝硅酸盐矿物,主要产于伟晶花岗岩中,产地包括美国巴西马达加斯加巴基斯坦中国新疆等地。可能由于所含的微量金属离子不同,而呈现出不同的颜色。 近期莫桑比克也发现大量锂辉石

最早被发现的锂辉石是紫锂辉石,其于1877年在巴西被发现。

參考資料

[编辑]
  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. ^ Spodumene页面存档备份,存于互联网档案馆), Mindat.org
  3. ^ Anthony, John W., Bideaux, Richard A., Bladh, Kenneth W., and Nichols, Monte C. (1990). Handbook of Mineralogy页面存档备份,存于互联网档案馆. Mineral Data Publishing, Tucson, Arizona
  4. ^ Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., ISBN 0-471-80580-7
  5. ^ Deer, Howie and Zussman, Rock Forming Minerals, v. 2 Chain Silicates, Wiley, 1963 pp. 92-98
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锂辉石
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