Arsenolite
As2O3IMA symbol: Asograndfathered
Arsenolite is an oxide or hydroxide mineral with the formula As2O3, crystallizing in the cubic system. It has a Mohs hardness of 1.5, typically white, red or yellow in color, with a silky or vitreous luster, a specific gravity of 5.3. Its streak is white or yellow.
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Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | F d -3 m :2 |
| Cell (Å, °) | a = 11.07343, b = 11.07343, c = 11.07343; α = 90, β = 90, γ = 90 |
| Cell volume | 1357.83 ų, Z = 16 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 8100662 |
| Source structure | COD 8100662 (Zeitschrift für Kristallographie - New Crystal Structures, 2002) — 1 of 4 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.197 | 6.393 | 2.54 | 2.768 | 1.958 | 1.551 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 71.3 | 34.7 | 28.8 | 25.8 | 22.2 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 8100662; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.871 g/cm³calculated from COD 8100662 |
|---|---|
| Hardness (Mohs) | 1.5single sourceWikidata (CC0) 1.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 5.3 g/cm3single sourceFord, Dana's Textbook of Mineralogy, 3rd ed. (1922) |
| Color | red, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | silky, vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 197.84 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | As 75.74%, O 24.26% |
Classification
| Nickel-Strunz (10th) | 4.CB.50Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.CB.50Wikidata (CC0) |
| Dana (8th) | 4.3.9.1Wikidata (CC0) |