Mascagnite
(NH4)2(SO4)IMA symbol: Mscgrandfathered
Mascagnite is a sulfate mineral with the formula (NH4)2(SO4), crystallizing in the orthorhombic system. It has a Mohs hardness of 2-2.5, typically gray or yellow in color, with a vitreous luster, a specific gravity of 1.76-1.77. Cleavage is distinct.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n a m |
| Cell (Å, °) | a = 7.782, b = 10.636, c = 5.993; α = 90, β = 90, γ = 90 |
| Cell volume | 496.037 ų, Z = 4 |
| Axial ratios | 0.7317:1:0.5635calculated from COD 9009882 |
| Source structure | COD 9009882 (Journal of Chemical Physics, 1966) — 1 of 2 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 4.336 | 3.051 | 4.391 | 3.891 | 2.997 | 3.14 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 51.2 | 50.1 | 34.4 | 30 | 24.9 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009882; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 1.769 g/cm³calculated from COD 9009882 |
|---|---|
| Hardness (Mohs) | 2-2.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 1.76-1.77 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | gray, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Cleavage | distinctDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 132.14 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | N 21.2%, H 6.1%, S 24.27%, O 48.43% |
Classification
| Nickel-Strunz (10th) | 7.AD.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 7.AD.05Wikidata (CC0) |
| Dana (8th) | 28.2.1.1Wikidata (CC0) |