Phosphophyllite
Zn2Fe2+(PO4)2·4H2OIMA symbol: Ppgrandfathered
Phosphophyllite is a phosphate, arsenate, or vanadate mineral with the formula Zn2Fe2+(PO4)2·4H2O, crystallizing in the monoclinic system. It has a Mohs hardness of 3, a calculated density of 3.127 g/cm3. Its streak is white.
Photos
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 1 21/c 1 |
| Cell (Å, °) | a = 10.378, b = 5.084, c = 10.553; α = 90, β = 121.14, γ = 90 |
| Cell volume | 476.564 ų, Z = 2 |
| Axial ratios | 2.0413:1:2.0757calculated from COD 9000577 |
| Source structure | COD 9000577 (American Mineralogist, 1977) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 8.883 | 2.835 | 2.815 | 4.441 | 3.393 | 3.381 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 73.8 | 73.2 | 51.9 | 44.5 | 42.3 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9000577; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.127 g/cm³calculated from COD 9000577 |
|---|---|
| Hardness (Mohs) | 3single sourceWikidata (CC0) |
| Streak | whitesingle sourceWikidata (CC0) |
Classification
| Nickel-Strunz (10th) | 8.CA.40Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.CA.40Wikidata (CC0) |