Hureaulite
Mn2+5(PO3OH)2(PO4)2·4H2OIMA symbol: Hurrenamed
Hureaulite is a phosphate, arsenate, or vanadate mineral with the formula Mn2+5(PO3OH)2(PO4)2·4H2O. It has a Mohs hardness of 5, typically colorless, brown, gray or orange in color, with a greasy or vitreous luster, a specific gravity of 3.185. Its streak is white.
Photos
Crystallography
| Space group | C 1 2/c 1 |
|---|---|
| Cell (Å, °) | a = 17.594, b = 9.086, c = 9.404; α = 90, β = 96.67, γ = 90 |
| Cell volume | 1493.14 ų, Z = 4 |
| Axial ratios | 1.9364:1:1.0350calculated from COD 9000305 |
| Source structure | COD 9000305 (American Mineralogist, 1973) |
Physical properties
| Density (calculated) | 3.197 g/cm³calculated from COD 9000305 |
|---|---|
| Hardness (Mohs) | 5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.185 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | brown, colorless, gray, orange, red, rose, violetsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | greasy, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Classification
| Nickel-Strunz (10th) | 8.CB.10Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.CB.10Wikidata (CC0) |