Achávalite
FeSeIMA symbol: Ahvrenamed
Achávalite is a sulfide or sulfosalt mineral with the formula FeSe, crystallizing in the hexagonal system. It has a calculated density of 6.576 g/cm3.
Crystallography
| Crystal system | hexagonal crystal systemWikidata (CC0) |
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| Space group | P 63 m c |
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| Cell (Å, °) | a = 3.636, b = 3.636, c = 5.946; α = 90, β = 90, γ = 120 |
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| Cell volume | 68.077 ų, Z = 2 |
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| Axial ratios | 1.0000:1:1.6353calculated from COD 9015076 |
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| Source structure | COD 9015076 (Neues Jahrbuch fur Mineralogie, Monatshefte, 1972) — 1 of 4 structures |
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Powder X-ray diffraction (calculated)
| d (Å) | 2.783 | 2.162 | 1.818 | 1.151 | 1.391 | 1.677 |
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| I/I₀ | 100 | 98 | 55.4 | 23.6 | 21.9 | 21.4 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015076; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 6.576 g/cm³calculated from COD 9015076 |
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Chemistry (calculated)
| Molecular weight | 134.81 g/molcalculated from the IMA formula |
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| Composition (wt%) | Fe 41.43%, Se 58.57% |
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Classification
| Nickel-Strunz (10th) | 2.CC.05Wikidata (CC0) |
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| Nickel-Strunz (9th) | 2.CC.05Wikidata (CC0) |
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