Cumengeite
Pb21Cu20Cl42(OH)40·6H2OIMA symbol: Cgerenamed
Cumengeite is a halide mineral with the formula Pb21Cu20Cl42(OH)40·6H2O. It has a calculated density of 4.642 g/cm3.
Photos
Crystallography
| Space group | I 4/m m m |
|---|---|
| Cell (Å, °) | a = 15.065, b = 15.065, c = 24.436; α = 90, β = 90, γ = 90 |
| Cell volume | 5545.85 ų, Z = 2 |
| Axial ratios | 1.0000:1:1.6220calculated from COD 9009467 |
| Source structure | COD 9009467 (Mineralogical Magazine, 1986) |
Physical properties
| Density (calculated) | 4.642 g/cm³calculated from COD 9009467 |
|---|
Chemistry (calculated)
| Molecular weight | 7899.53 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 55.08%, Cu 16.09%, Cl 18.85%, O 9.32%, H 0.66% |
Classification
| Nickel-Strunz (10th) | 3.DB.20Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 3.DB.20Wikidata (CC0) |