Herbertsmithite
Cu3Zn(OH)6Cl2IMA symbol: Herapproved
Herbertsmithite is a halide mineral with the formula Cu3Zn(OH)6Cl2, crystallizing in the trigonal system. It has a calculated density of 3.754 g/cm3.
Crystallography
| Crystal system | trigonal crystal systemWikidata (CC0) |
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| Space group | R -3 m :H |
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| Cell (Å, °) | a = 6.834, b = 6.834, c = 14.075; α = 90, β = 90, γ = 120 |
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| Cell volume | 569.284 ų, Z = 3 |
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| Axial ratios | 1.0000:1:2.0596calculated from COD 9013943 |
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| Source structure | COD 9013943 (Mineralogical Magazine, 2004) — 1 of 2 structures |
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Powder X-ray diffraction (calculated)
| d (Å) | 5.456 | 2.762 | 2.265 | 1.709 | 1.819 | 2.896 |
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| I/I₀ | 100 | 82.3 | 68.1 | 31 | 26.1 | 23 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9013943; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.754 g/cm³calculated from COD 9013943 |
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Chemistry (calculated)
| Molecular weight | 429.0 g/molcalculated from the IMA formula |
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| Composition (wt%) | Cu 44.44%, Zn 15.25%, O 22.38%, H 1.41%, Cl 16.53% |
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Classification
| Nickel-Strunz (10th) | 3.DA.10cWikidata (CC0) |
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| Nickel-Strunz (9th) | 3.DA.10cWikidata (CC0) |
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