Antarcticite
CaCl2·6H2OIMA symbol: Atcapproved
Antarcticite is a halide mineral with the formula CaCl2·6H2O, crystallizing in the trigonal system. It has a calculated density of 1.712 g/cm3.
Crystallography
| Crystal system | trigonal crystal systemWikidata (CC0) |
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| Space group | P 3 2 1 |
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| Cell (Å, °) | a = 7.8759, b = 7.8758, c = 3.9545; α = 90, β = 90, γ = 120 |
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| Cell volume | 212.431 ų, Z = 1 |
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| Axial ratios | 1.0000:1:0.5021calculated from COD 9007715 |
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| Source structure | COD 9007715 (Acta Crystallographica, Section C, 1986) — 1 of 2 structures |
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Powder X-ray diffraction (calculated)
| d (Å) | 3.938 | 3.938 | 3.938 | 2.79 | 2.79 | 2.79 |
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| I/I₀ | 100 | 100 | 100 | 95.6 | 95.6 | 95.6 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007715; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 1.712 g/cm³calculated from COD 9007715 |
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Chemistry (calculated)
| Molecular weight | 219.08 g/molcalculated from the IMA formula |
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| Composition (wt%) | Ca 18.29%, Cl 32.37%, H 5.52%, O 43.82% |
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Classification
| Nickel-Strunz (10th) | 3.BB.30Wikidata (CC0) |
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| Nickel-Strunz (9th) | 3.BB.30Wikidata (CC0) |
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