Eskolaite
Cr2O3IMA symbol: Eskgrandfathered
Eskolaite is an oxide or hydroxide mineral with the formula Cr2O3, crystallizing in the trigonal system. It has a calculated density of 5.433 g/cm3.
Crystallography
| Crystal system | trigonal crystal systemWikidata (CC0) |
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| Space group | R -3 c :H |
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| Cell (Å, °) | a = 4.8949, b = 4.8949, c = 13.432; α = 90, β = 90, γ = 120 |
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| Cell volume | 278.714 ų, Z = 6 |
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| Axial ratios | 1.0000:1:2.7441calculated from COD 9014810 |
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| Source structure | COD 9014810 (American Mineralogist, 2012) — 1 of 25 structures |
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Powder X-ray diffraction (calculated)
| d (Å) | 2.632 | 2.447 | 1.652 | 3.585 | 1.413 | 1.792 |
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| I/I₀ | 100 | 92.7 | 91.8 | 67.9 | 41.6 | 38.1 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014810; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 5.433 g/cm³calculated from COD 9014810 |
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Chemistry (calculated)
| Molecular weight | 151.99 g/molcalculated from the IMA formula |
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| Composition (wt%) | Cr 68.42%, O 31.58% |
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Classification
| Nickel-Strunz (10th) | 4.CB.05Wikidata (CC0) |
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| Nickel-Strunz (9th) | 4.CB.05Wikidata (CC0) |
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| Dana (8th) | 4.3.1.3Wikidata (CC0) |
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