Hydrozincite
Zn5(CO3)2(OH)6IMA symbol: Hzncgrandfathered
Hydrozincite is a carbonate or nitrate mineral with the formula Zn5(CO3)2(OH)6, crystallizing in the monoclinic system. It has a Mohs hardness of 2-2.5, typically white, gray or yellow in color, with a dull luster, a specific gravity of 3.58-3.8. Its streak is white.
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Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | C 1 2/m 1 |
| Cell (Å, °) | a = 13.62, b = 6.3, c = 5.42; α = 90, β = 95.833, γ = 90 |
| Cell volume | 462.661 ų, Z = 2 |
| Axial ratios | 2.1619:1:0.8603calculated from COD 9007481 |
| Source structure | COD 9007481 (Acta Crystallographica, 1964) |
Physical properties
| Density (calculated) | 3.898 g/cm³calculated from COD 9007481 |
|---|---|
| Hardness (Mohs) | 2-2.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 3.58-3.8 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) |
| Luster | dullsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 549.11 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Zn 59.56%, C 4.37%, O 34.96%, H 1.1% |
Classification
| Nickel-Strunz (10th) | 5.BA.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 5.BA.15Wikidata (CC0) |