Mirabilite
Na2(SO4)·10H2OIMA symbol: Mrbgrandfathered
Mirabilite is a sulfate mineral with the formula Na2(SO4)·10H2O, crystallizing in the monoclinic system. It has a Mohs hardness of 1.5-2, typically white in color, with a vitreous luster, a specific gravity of 1.481. Its streak is white.
Photos
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Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | P 1 21/c 1 |
| Cell (Å, °) | a = 11.512, b = 10.37, c = 12.847; α = 90, β = 107.789, γ = 90 |
| Cell volume | 1460.3 ų, Z = 4 |
| Axial ratios | 1.1101:1:1.2389calculated from COD 1008758 |
| Source structure | COD 1008758 (Acta Crystallographica, Section B, 1978) |
Powder X-ray diffraction (calculated)
| d (Å) | 5.481 | 3.205 | 3.259 | 3.104 | 4.774 | 3.833 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 60.4 | 48.7 | 41.9 | 38.8 | 30.2 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 1008758; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 1.465 g/cm³calculated from COD 1008758 |
|---|---|
| Hardness (Mohs) | 1.5-2single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.481 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 322.19 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Na 14.27%, S 9.95%, O 69.52%, H 6.26% |
Classification
| Nickel-Strunz (10th) | 7.CD.10Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 7.CD.10Wikidata (CC0) |