Bunsenite
NiOIMA symbol: Bsegrandfathered
Bunsenite is an oxide or hydroxide mineral with the formula NiO, crystallizing in the cubic system. It has a Mohs hardness of 5.5, typically green in color, with a vitreous luster, a specific gravity of 6.398. Its streak is black or brown.
Photos
Crystallography
| Crystal system | cubic crystal systemWikidata (CC0) |
|---|---|
| Space group | F m -3 m |
| Cell (Å, °) | a = 8.32, b = 8.32, c = 8.32; α = 90, β = 90, γ = 90 |
| Cell volume | 575.93 ų, Z = 4 |
| Axial ratios | 1.0000:1:1.0000calculated from COD 9013975 |
| Source structure | COD 9013975 (Solid State Communications, 1998) — 1 of 7 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 2.08 | 2.402 | 1.471 | 1.254 | 4.804 | 1.201 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 65.4 | 56.3 | 26.2 | 19.4 | 17.3 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9013975; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 6.171 g/cm³calculated from COD 9013975 |
|---|---|
| Hardness (Mohs) | 5.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 6.398 g/cm3corroboratedDana, System of Mineralogy, 6th ed. (1892) |
| Color | greensingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | black, brownsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 74.69 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Ni 78.58%, O 21.42% |
Classification
| Nickel-Strunz (10th) | 4.AB.25Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.AB.25Wikidata (CC0) |