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阳起石

阳起石
葡萄牙的陽起石。
基本資料
類別鏈矽酸鹽礦物
角閃石
化学式Ca2(Mg,Fe)5Si8O22(OH)2
IMA記號Act[1]
施特龙茨分类9.DE.10
戴納礦物分類66.01.03a.02
晶体分类棱柱体 (2/m)
(H-M記號相同)
晶体空间群C2/m
性質
顏色浅绿至深绿、黃綠、黑色,當產狀為石綿時白或灰色
晶体惯态葉片狀, 纖維狀, 放射狀
晶系單斜晶系
雙晶簡單雙晶或聚片雙晶
解理{110}完全解理
断口參差斷口
莫氏硬度5–6
光澤玻璃光澤或黯淡光澤
條痕白色
透明性半透明或透明
比重3.00 (+0.10, -0.05)
拋磨光澤玻璃光澤
光學性質雙軸(-)
折射率nα = 1.613–1.628
nβ = 1.627–1.644
nγ = 1.638–1.655
双折射0.0250-0.0270
多色性中等,黃色至深綠色 (in stones that are transparent)
2V夹角78–82° (計算值), 84–73° (測量值)
色散率r < v
發光性惰性
吸收光譜faint line at 503 nm
參考文獻[2][3][4][5]

阳起石(英語:Actinolite)為雙鏈矽酸鹽礦物角閃石族的礦物,當透闪石中的离子被二价离子置换超過2%以上就會成為阳起石,隨著铁含量越高颜色就越偏向深绿色及黑色。石棉状的阳起石可呈白色或灰色。

英文名稱來自希臘文「ἀκτίς(aktis)」,意思為「光線」,因為該礦物常呈現纖維狀的關係[3]

晶体为扁平柱状、粒状或针状聚集。见于片麻岩千枚岩。可与滑石、石棉、蛇纹石等其他矿物共生。常产于含铁的接触变质矿床和接触变质石灰岩、白云岩中,也常交代基性和中性火成岩中的辉石而呈假象出现;此种具辉石假象的次生阳起石称为纤闪石。

用途

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是深色玉石的成份之一。质地细腻的阳起石可以作为观赏石。纤维状的可用作工业石棉

块状、致密的阳起石被中医认为性温咸,有温肾壮阳的功效,用来治疗阳痿遗精早泄等症状。这也是其中文名字的由来。但其物質普遍含有毒性,且玉石類成分複雜恐含有重金屬,故現代中醫甚少使用之方劑。

參考文獻

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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. ^ Actinolite页面存档备份,存于互联网档案馆). Mindat.org
  3. ^ 3.0 3.1 Actinolite页面存档备份,存于互联网档案馆). Webmineral.org
  4. ^ Actinolite页面存档备份,存于互联网档案馆). Handbook of mineralogy
  5. ^ Gem Reference Guide. City: Gemological Institute of America (GIA), 1988. ISBN 0-87311-019-6

外部連結

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阳起石
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