Sinhalite
MgAl(BO4)IMA symbol: Shlgrandfathered
Sinhalite is a borate mineral with the formula MgAl(BO4), crystallizing in the orthorhombic system. It has a calculated density of 3.45 g/cm3.
Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
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| Space group | P b n m |
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| Cell (Å, °) | a = 4.332, b = 9.8819, c = 5.6813; α = 90, β = 90, γ = 90 |
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| Cell volume | 243.207 ų, Z = 4 |
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| Axial ratios | 0.4384:1:0.5749calculated from COD 9005190 |
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| Source structure | COD 9005190 (European Journal of Mineralogy, 1994) — 1 of 3 structures |
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Powder X-ray diffraction (calculated)
| d (Å) | 1.626 | 2.141 | 2.622 | 2.31 | 3.253 | 2.381 |
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| I/I₀ | 100 | 91.1 | 73.4 | 68.2 | 59.4 | 57.8 |
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xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9005190; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 3.45 g/cm³calculated from COD 9005190 |
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Chemistry (calculated)
| Molecular weight | 126.1 g/molcalculated from the IMA formula |
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| Composition (wt%) | Mg 19.28%, Al 21.4%, B 8.57%, O 50.75% |
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Classification
| Nickel-Strunz (10th) | 6.AC.05Wikidata (CC0) |
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| Nickel-Strunz (9th) | 6.AC.05Wikidata (CC0) |
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| Dana (8th) | 24.1.1.1Wikidata (CC0) |
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