Acuminite
SrAlF4(OH)·H2OIMA symbol: Acuapproved
Acuminite is a halide mineral with the formula SrAlF4(OH)·H2O, crystallizing in the monoclinic system. It has a calculated density of 3.262 g/cm3.
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
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| Space group | C 1 2/c 1 |
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| Cell (Å, °) | a = 13.223, b = 5.175, c = 14.251; α = 90, β = 111.61, γ = 90 |
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| Cell volume | 906.639 ų, Z = 8 |
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| Axial ratios | 2.5552:1:2.7538calculated from COD 9008399 |
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| Source structure | COD 9008399 (Zeitschrift fur Kristallographie, 1991) |
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Powder X-ray diffraction (calculated)
| d (Å) | 4.707 | 3.352 | 3.504 | 4.77 | 2.076 | 3.032 |
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| I/I₀ | 100 | 77.5 | 71.8 | 61.5 | 43.8 | 40.1 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9008399; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.262 g/cm³calculated from COD 9008399 |
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Chemistry (calculated)
| Molecular weight | 225.62 g/molcalculated from the IMA formula |
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| Composition (wt%) | Sr 38.84%, Al 11.96%, F 33.68%, O 14.18%, H 1.34% |
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Classification
| Nickel-Strunz (10th) | 3.CC.10Wikidata (CC0) |
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| Nickel-Strunz (9th) | 3.CC.10Wikidata (CC0) |
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