烧绿石
烧绿石(英语:Pyrochlore)是一类含铌矿物,化学式可表示为Na,Ca)2Nb2O6(OH,F)。
Pyrochlore | |
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Pyrochlore from Russia | |
基本資料 | |
類別 | Oxide mineral |
化学式 | (Na,Ca)2Nb2O6(OH,F) |
施特龙茨分类 | 4.DH.15 |
戴納礦物分類 | 08.02.01.01 烧绿石group |
晶体分类 | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
晶体空间群 | Fd3m |
晶胞 | a = 10.41(6) Å, Z = 8 |
性質 | |
顏色 | Black to brown, chocolate-brown, reddish brown, amber-orange, red-orange |
晶体惯态 | Typically octahedra, disseminated granular, massive |
晶系 | Isometric |
雙晶 | 111 rare |
解理 | 111 indistinct, may be a parting. |
断口 | Subconchoidal to uneven, splintery |
韌性/脆性 | 脆 |
莫氏硬度 | 5.0–5.5 |
光澤 | Vitreous to resinous |
條痕 | 白 |
透明性 | Subtranslucent to opaque |
比重 | 4.45 to 4.90 |
光學性質 | Isotropic, weak anomalous anisotropism |
折射率 | n = 1.9–2.2 |
其他特徵 | Variably radioactive, often metamict |
參考文獻 | [1][2][3][4] |
烧绿石也是通式为A2B2O7(其中A和B均为金属)的晶体的结构。
发现
烧绿石最初于1826年于Stavern (Fredriksvärn), Larvik, Vestfold, Norway发现,其名称源于古希腊语的“火”和“绿色”——它在经典吹管分析中燃烧会变绿。[3]
参考文献
维基共享资源中相关的多媒体资源:烧绿石 |
- Atencio, D.; Andrade, M. B.; Christy, A. G.; Gieré, R.; Kartashov, P. M. . The Canadian Mineralogist. 2010, 48 (3): 673–698. doi:10.3749/canmin.48.3.673.
[2]. BP Mandal, AK Tyagi - Barc Newslett, 2010 - barc.gov.in
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