Xiangjiangite
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CategoryPhosphate minerals
Strunz classification8.EB.05
| Xiangjiangite | |
|---|---|
| General | |
| Category | Phosphate minerals |
| Formula | (Fe3+, Al)(UO2)4(PO4)2(SO4)2(OH)·22(H2O) |
| IMA symbol | Xjg[1] |
| Strunz classification | 8.EB.05 |
| Crystal system | Tetragonal Unknown space group |
| Unit cell | 1,142.31 |
| Identification | |
| Formula mass | 453.91 g/mol |
| Color | Yellow |
| Crystal habit | Microscopic crystals; Platy |
| Mohs scale hardness | 1–2 |
| Luster | Silky |
| Streak | Light yellow |
| Diaphaneity | Semitransparent |
| Specific gravity | 3.47 |
| Optical properties | Biaxial(−) |
| Refractive index | nα = 1.558 nβ = 1.576 nγ = 1.593 |
| Birefringence | 0.035 |
| Pleochroism | Weak |
| 2V angle | 87 |
| Dispersion | Weak |
| Other characteristics |  Radioactive |
| References | [2][3][4] |
Xiangjiangite is a phosphate mineral discovered near and named for the Xiang Jiang River in China. It was approved by the IMA in 1978, and was named after its locality.[5]
