Goslarite
Zn(SO4)·7H2OIMA symbol: Gosgrandfathered
Goslarite is a sulfate mineral with the formula Zn(SO4)·7H2O, crystallizing in the orthorhombic system. It has a Mohs hardness of 2-2.5, typically white, red or yellow in color, with a vitreous luster, a specific gravity of 1.9-2.1. Its streak is white.
Photos
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 21 21 21 |
| Cell (Å, °) | a = 11.728, b = 11.973, c = 6.772; α = 90, β = 90, γ = 90 |
| Cell volume | 950.92 ų, Z = 4 |
| Axial ratios | 0.9795:1:0.5656calculated from COD 9017540 |
| Source structure | COD 9017540 (Mineralogical Magazine, 2005) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 4.189 | 4.157 | 5.332 | 5.267 | 4.433 | 3.438 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 82.3 | 69 | 60.7 | 49.6 | 31.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9017540; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.009 g/cm³calculated from COD 9017540 |
|---|---|
| Hardness (Mohs) | 2-2.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.9-2.1 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | red, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 287.58 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Zn 22.74%, S 11.15%, O 61.2%, H 4.91% |
Classification
| Nickel-Strunz (10th) | 7.CB.40Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 7.CB.40Wikidata (CC0) |
| Dana (8th) | 29.6.11.2Wikidata (CC0) |