胆矾
膽礬是一種具有水溶性的藍或綠色的硫酸銅晶體。它通常存在於銅礦床的晚期氧化區，由於其易溶解性，在乾旱地區更為常見。
| 胆矾 | |
|---|---|
 | |
| 基本資料 | |
| 類別 | 硫酸盐矿物 |
| 化學式 | CuSO4·5H2O |
| 施特龙茨分类 | 7.CB.20 |
| 晶体分类 | Pinacoidal (1) (same 赫尔曼–莫甘记号) |
| 晶体空间群 | P1 |
| 晶胞 | a = 6.11 Å, b = 10.673 Å, c = 5.95 Å; α = 97.58°, β = 107.17°, γ = 77.55°; Z = 2 |
| 性質 | |
| 顏色 | Berlin blue to sky-blue, greenish blue |
| 晶体惯态 | Typically stalactitic, encrusted, reniform or massive. Natural crystals are rare, but are short prismatic or tabular |
| 晶系 | 三斜晶系 |
| 雙晶 | Rare as cruciform twins |
| 解理 | Perfect on {110}; interrupted on {110} |
| 斷口 | Conchoidal |
| 摩氏硬度 | 2.5 |
| 光澤 | Vitreous |
| 條痕 | 白色 |
| 透明性 | Transparent to translucent |
| 比重 | 2.12 - 2.3 |
| 光學性質 | Biaxial (-) |
| 折射率 | nα = 1.514 nβ = 1.537 nγ = 1.543 |
| 雙折射 | δ = 0.029 |
| 2V angle | Measured: 56° |
| 溶解度 | 可溶于水并变蓝 |
| 其他特徵 |  |
| 參考文獻 | [1][2][3] |
別名
古代中國又稱膽礬為石膽、曾青等。
另見
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