Vauxite
Fe2+Al2(PO4)2(OH)2·6H2OIMA symbol: Vxgrandfathered
Vauxite is a phosphate, arsenate, or vanadate mineral with the formula Fe2+Al2(PO4)2(OH)2·6H2O, crystallizing in the triclinic system. It has a calculated density of 2.337 g/cm3. Its streak is white.
Photos
Crystallography
| Crystal system | triclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P -1 |
| Cell (Å, °) | a = 9.13, b = 11.59, c = 6.14; α = 98.3, β = 92, γ = 108.4 |
| Cell volume | 607.797 ų, Z = 2 |
| Axial ratios | 0.7877:1:0.5298calculated from COD 9000171 |
| Source structure | COD 9000171 (American Mineralogist, 1968) |
Powder X-ray diffraction (calculated)
| d (Å) | 10.849 | 8.631 | 8.167 | 5.459 | 6.053 | 5.888 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 42.9 | 35.2 | 32.6 | 30.9 | 23.4 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9000171; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.337 g/cm³calculated from COD 9000171 |
|---|---|
| Streak | whitesingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 8.DC.35Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.DC.35Wikidata (CC0) |