Wagnerite
Mg2(PO4)FIMA symbol: Wagredefined
Wagnerite is a phosphate, arsenate, or vanadate mineral with the formula Mg2(PO4)F, crystallizing in the monoclinic system. It has a Mohs hardness of 5-5.5, typically gray, green, red or yellow in color, with a vitreous luster, a specific gravity of 3.068. Its streak is white.
Photos
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | C 1 2/c 1 |
| Cell (Å, °) | a = 12.7633, b = 6.3282, c = 9.635; α = 90, β = 117.599, γ = 90 |
| Cell volume | 689.66 ų, Z = 8 |
| Axial ratios | 2.0169:1:1.5225calculated from COD 2310761 |
| Source structure | COD 2310761 (Acta Crystallographica, Section B: Structural Science, Crystal Engineering and Materials, 2014) — 1 of 10 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.967 | 2.834 | 3.113 | 3.286 | 2.748 | 2.694 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 78.7 | 65.4 | 51.1 | 26.1 | 16.8 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 2310761; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.132 g/cm³calculated from COD 2310761 |
|---|---|
| Hardness (Mohs) | 5-5.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.068 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, green, red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 162.58 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Mg 29.9%, P 19.05%, O 39.36%, F 11.69% |
Classification
| Nickel-Strunz (10th) | 8.BB.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.BB.15Wikidata (CC0) |
| Dana (8th) | 41.6.2.1Wikidata (CC0) |