Vanadinite
Pb5(VO4)3ClIMA symbol: Vnagrandfathered
Vanadinite is a phosphate, arsenate, or vanadate mineral with the formula Pb5(VO4)3Cl, crystallizing in the hexagonal system. It has a Mohs hardness of 2.75-3, typically brown, red or yellow in color, with a resinous luster, a specific gravity of 6.635. Its streak is white or yellow.
Photos
Crystallography
| Crystal system | hexagonal crystal systemWikidata (CC0) |
|---|---|
| Space group | P 63/m |
| Cell (Å, °) | a = 10.3231, b = 10.3231, c = 7.3399; α = 90, β = 90, γ = 120 |
| Cell volume | 677.394 ų, Z = 2 |
| Axial ratios | 1.0000:1:0.7110calculated from COD 9016949 |
| Source structure | COD 9016949 (American Mineralogist, 2013) — 1 of 6 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.069 | 2.991 | 2.98 | 2.111 | 3.379 | 1.909 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 93.2 | 53.2 | 37.5 | 34.2 | 30.5 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9016949; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 6.427 g/cm³calculated from COD 9016949 |
|---|---|
| Hardness (Mohs) | 3single sourceWikidata (CC0) 2.75-3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 6.635 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | brown, red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | strawsingle sourceWikidata (CC0) white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | resinoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 1416.27 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 73.15%, V 10.79%, O 13.56%, Cl 2.5% |
Classification
| Nickel-Strunz (10th) | 8.BN.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.BN.05Wikidata (CC0) |
| Dana (8th) | 41.8.4.3Wikidata (CC0) |