Eosphorite
Mn2+Al(PO4)(OH)2·H2OIMA symbol: Eosgrandfathered
Eosphorite is a phosphate, arsenate, or vanadate mineral with the formula Mn2+Al(PO4)(OH)2·H2O. It has a Mohs hardness of 2-3, typically black or brown in color, a specific gravity of 2.8. Its streak is white.
Photos
Crystallography
| Space group | C m c e |
|---|---|
| Cell (Å, °) | a = 6.928, b = 10.445, c = 13.501; α = 90, β = 90, γ = 90 |
| Cell volume | 976.972 ų, Z = 8 |
| Axial ratios | 0.6633:1:1.2926calculated from COD 9009483 |
| Source structure | COD 9009483 (Mineralogical Magazine, 1993) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.823 | 1.529 | 5.223 | 6.75 | 4.388 | 2.399 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 52.5 | 38.5 | 36.3 | 35.4 | 35.2 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009483; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.115 g/cm³calculated from COD 9009483 |
|---|---|
| Hardness (Mohs) | 5single sourceWikidata (CC0) 2-3single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Specific gravity | 2.8 g/cm3single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Color | black, brownsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Streak | whitesingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 8.DD.20Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.DD.20Wikidata (CC0) |