卤砂,英文名Salammoniac[2],也称为 Sal ammoniac 或 Salmiac,是一种罕见的天然矿物,主要成分是氯化铵(NH4Cl),可形成无色、白色或黄棕色等轴六面体点阵,难发生解理,易发生贝壳状破裂。
卤砂 | |
---|---|
基本資料 | |
類別 | Halide mineral |
化学式 | NH4Cl |
IMA記號 | Sam[1] |
施特龙茨分类 | 3.AA.25 |
晶体分类 | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
晶体空间群 | Pm3m |
晶胞 | a = 3.859 Å; Z = 1 |
性質 | |
分子量 | 53.49 g/mol |
顏色 | Colorless, white, pale gray; may be pale yellow to brown, if impure. |
晶体惯态 | Crystals skeletal or dendritic; massive, encrustations |
晶系 | Isometric |
雙晶 | On {111} |
解理 | Imperfect on {111} |
断口 | Conchoidal |
韌性/脆性 | Sectile |
莫氏硬度 | 1–2 |
光澤 | Vitreous |
條痕 | White |
透明性 | Transparent |
比重 | 1.535 |
光學性質 | Isotropic |
折射率 | n = 1.639 |
双折射 | Weak after deformation |
發光性 | No |
吸收光譜 | No |
溶解度 | In water |
参考文献
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