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 | |
|---|---|
 Pyrochlore from Russia | |
| 基本資料 | |
| 類別 | Oxide mineral |
| 化學式 | (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. |
| 斷口 | Subconchoidal to uneven, splintery |
| 韌性/脆性 | 脆 |
| 摩氏硬度 | 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 |
- Mineralienatlas
- (PDF). rruff.info. [2015-02-03].
- . mindat.org. [2015-02-03].
- Barthelmy, Dave. . webmineral.com. [2015-02-03].
- 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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