Arcanite
K2(SO4)IMA symbol: Acngrandfathered
Arcanite is a sulfate mineral with the formula K2(SO4), crystallizing in the orthorhombic system. It has a Mohs hardness of 2, a calculated density of 2.668 g/cm3. Its streak is white.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n a m |
| Cell (Å, °) | a = 7.476, b = 10.071, c = 5.763; α = 90, β = 90, γ = 90 |
| Cell volume | 433.901 ų, Z = 4 |
| Axial ratios | 0.7423:1:0.5722calculated from COD 9007569 |
| Source structure | COD 9007569 (Acta Crystallographica, Section B, 1972) |
Powder X-ray diffraction (calculated)
| d (Å) | 2.901 | 2.994 | 2.881 | 3.001 | 2.079 | 2.419 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 71.2 | 63.2 | 32.1 | 31 | 29.5 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007569; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.668 g/cm³calculated from COD 9007569 |
|---|---|
| Hardness (Mohs) | 2single sourceWikidata (CC0) |
| Streak | whitesingle sourceWikidata (CC0) |
Chemistry (calculated)
| Molecular weight | 174.26 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | K 44.87%, S 18.4%, O 36.73% |
Classification
| Nickel-Strunz (10th) | 7.AD.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 7.AD.05Wikidata (CC0) |
| Dana (8th) | 28.2.1.2Wikidata (CC0) |