Carminite
PbFe3+2(AsO4)2(OH)2IMA symbol: Cmtgrandfathered
Carminite is a phosphate, arsenate, or vanadate mineral with the formula PbFe3+2(AsO4)2(OH)2. It has a Mohs hardness of 2-5, typically red or yellow in color, with a pearly or vitreous luster, a specific gravity of 4.105. Its streak is brown.
Photos
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Crystallography
| Space group | C c c m |
|---|---|
| Cell (Å, °) | a = 16.591, b = 7.58, c = 12.285; α = 90, β = 90, γ = 90 |
| Cell volume | 1544.96 ų, Z = 8 |
| Axial ratios | 2.1888:1:1.6207calculated from COD 9009500 |
| Source structure | COD 9009500 (Mineralogical Magazine, 1996) — 1 of 5 structures |
Physical properties
| Density (calculated) | 5.406 g/cm³calculated from COD 9009500 |
|---|---|
| Hardness (Mohs) | 2-5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.105 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | brownsingle sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Luster | pearly, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Classification
| Nickel-Strunz (10th) | 8.BH.30Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 8.BH.30Wikidata (CC0) |