Baryte
Ba(SO4)IMA symbol: Brtapproved
Baryte is a sulfate mineral with the formula Ba(SO4), crystallizing in the orthorhombic system. It has a Mohs hardness of 2.5-3.5, typically colorless in color, with a pearly or resinous luster, a specific gravity of 4.3-4.6. Its streak is white.
Photos
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n m a |
| Cell (Å, °) | a = 8.884, b = 5.458, c = 7.153; α = 90, β = 90, γ = 90 |
| Cell volume | 346.841 ų, Z = 4 |
| Axial ratios | 1.6277:1:1.3106calculated from COD 9014007 |
| Source structure | COD 9014007 (American Mineralogist, 1967) — 1 of 3 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.104 | 3.445 | 3.318 | 2.108 | 2.835 | 3.899 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 97.9 | 65.3 | 54.3 | 52.4 | 50.4 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014007; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 4.47 g/cm³calculated from COD 9014007 |
|---|---|
| Hardness (Mohs) | 2.5-3.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 4.3-4.6 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | colorlesssingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | pearly, resinous, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 233.39 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ba 58.84%, S 13.74%, O 27.42% |
Classification
| Nickel-Strunz (10th) | 7.AD.37Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 7.AD.35Wikidata (CC0) |
| Dana (8th) | 28.3.1.1Wikidata (CC0) |