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黝簾石

黝簾石
紅寶黝簾石 (左) & 坦尚黝簾石
基本資料
類別雙矽酸鹽礦物
綠廉石族
化学式Ca2Al3(SiO4)(Si2O7)O(OH)
IMA記號Zo[1]
施特龙茨分类9.BG.10
戴納礦物分類58.2.1b.1
性質
顏色灰、黃、藍、綠色
晶体惯态長柱狀
晶系斜方晶系
解理{010}完美,{100}不完美
断口參差狀至貝殼狀
韌性/脆性易脆
莫氏硬度6.5
光澤玻璃光澤,解理表面為珍珠光澤
條痕白或無色
透明性透明至半透明
比重3.10 - 3.38
光學性質雙軸(+)
折射率nα = 1.696 - 1.700 nβ = 1.696 - 1.702 nγ = 1.702 - 1.718
双折射0.006 - 0.018
多色性有,二色性或三色性依顏色而定
主要品種
藍黝簾石又稱坦尚石,清澈藍紫色的寶石級黝簾石,產於坦尚尼亞的會被特稱為坦桑石
錳黝簾石英语Thulite粉紅色,別名玫瑰黝簾石
紅寶黝簾石英语Anyolite通常與紅寶石共生
鉻黝簾石綠,不常見

黝簾石(英語:Zoisite)是鈣鋁羥基孤立雙四面體礦物,也是矽酸鹽礦物,屬於綠簾石組群。

其英文名稱是由斯洛維尼亞科學家西格蒙德·佐伊斯男爵命名的。1805年,礦物經銷商西蒙·普雷森在斯洛維尼亞柯羅斯卡地方的沙烏阿皮山發現了該種礦物,西蒙把這礦物帶來給男爵。確定類型之後,男爵起初命名為saualpite。黝簾石蘊藏於變質岩以及結晶花崗岩岩脈中,以多彩的正交晶系晶體或是以大團塊的形狀呈現,黝簾石有多種顏色,有:藍色紫羅蘭色綠色褐色粉紅色黃色灰色無色

斜黝簾石英语Clinozoisite是黝簾石單斜晶系的同質異形體,不同的產地出產不同的黝簾石,挪威主要出產錳黝簾石英语Thulite坦桑尼亞主要出產坦桑石紅寶黝簾石英语Anyolite肯亞主要出產紅寶黝簾石英语Anyolite,其他國家,例如瑞士奧地利印度巴基斯坦美國都有出產黝簾石。

紅寶黝簾石英语Anyolite(Ruby in Zoïsite)中有紅寶石共生,是相當好的雕刻素材,與印度出產另一種礦物紅寶鉻雲母(Ruby in Fuchsite)的外表相似,人們容易把兩者混淆,兩者硬度差別大。

参见

參考

  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. 
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黝簾石
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