Paratacamite
Cu3(Cu,Zn)Cl2(OH)6IMA symbol: Patagrandfathered
Paratacamite is a halide mineral with the formula Cu3(Cu,Zn)Cl2(OH)6. It has a Mohs hardness of 3, typically green in color, with a vitreous luster, a specific gravity of 2. Its streak is green; cleavage is distinct.
Photos
Crystallography
| Space group | R -3 :H |
|---|---|
| Cell (Å, °) | a = 13.654, b = 13.654, c = 14.041; α = 90, β = 90, γ = 120 |
| Cell volume | 2266.98 ų, Z = 24 |
| Axial ratios | 1.0000:1:1.0283calculated from COD 9007602 |
| Source structure | COD 9007602 (Acta Crystallographica, Section B, 1975) — 1 of 4 structures |
Physical properties
| Density (calculated) | 3.701 g/cm³calculated from COD 9007602 |
|---|---|
| Hardness (Mohs) | 3single sourceWikidata (CC0) |
| Specific gravity | 2 g/cm3single sourceDana's System, 3rd Appendix (1915) |
| Color | greenDana's System, 2nd Appendix (1909) |
| Streak | greenDana's System, 2nd Appendix (1909) |
| Luster | vitreousDana's System, 2nd Appendix (1909) |
| Cleavage | distinctDana's System, 2nd Appendix (1909) |
Classification
| Nickel-Strunz (10th) | 3.DA.10cWikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 3.DA.10cWikidata (CC0) |