Blödite
Na2Mg(SO4)2·4H2OIMA symbol: Blöapproved
Blödite is a sulfate mineral with the formula Na2Mg(SO4)2·4H2O. It has a calculated density of 2.227 g/cm3.
Crystallography
| Space group | P 1 21/a 1 |
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| Cell (Å, °) | a = 11.126, b = 8.242, c = 5.539; α = 90, β = 100.84, γ = 90 |
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| Cell volume | 498.866 ų, Z = 2 |
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| Axial ratios | 1.3499:1:0.6720calculated from COD 9004183 |
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| Source structure | COD 9004183 (The Canadian Mineralogist, 1985) |
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Powder X-ray diffraction (calculated)
| d (Å) | 3.285 | 4.554 | 3.25 | 4.54 | 3.249 | 2.968 |
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| I/I₀ | 100 | 81.8 | 65.6 | 54.7 | 42.5 | 40.3 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9004183; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 2.227 g/cm³calculated from COD 9004183 |
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Chemistry (calculated)
| Molecular weight | 334.47 g/molcalculated from the IMA formula |
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| Composition (wt%) | Na 13.75%, Mg 7.27%, S 19.17%, O 57.4%, H 2.41% |
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Classification
| Nickel-Strunz (10th) | 7.CC.50Wikidata (CC0) |
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| Nickel-Strunz (9th) | 7.CC.50Wikidata (CC0) |
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