Alforsite Ba5 (PO4 )3 Cl IMA symbol: Afr approved
Alforsite is a phosphate, arsenate, or vanadate mineral with the formula Ba5(PO4)3Cl, crystallizing in the hexagonal system. It has a calculated density of 4.772 g/cm3. Its streak is white.
Crystallography Crystal system hexagonal crystal systemWikidata (CC0) Space group P 63/m Cell (Å, °) a = 10.284, b = 10.284, c = 7.651; α = 90, β = 90, γ = 120 Cell volume 700.766 ų, Z = 2 Axial ratios 1.0000:1:0.7440calculated from COD 9007630 Source structure COD 9007630 (Acta Crystallographica, Section B, 1979)
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 3.069 3.081 2.969 2.134 2.033 3.366 I/I₀ 100 89.7 54.6 36.7 28.2 27.4
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007630; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 4.772 g/cm³calculated from COD 9007630 Streak whitesingle source Wikidata (CC0)
Chemistry (calculated) Molecular weight 1007.0 g/molcalculated from the IMA formula Composition (wt%) Ba 68.19%, P 9.23%, O 19.07%, Cl 3.52%
Classification Nickel-Strunz (10th) 8.BN.05Wikidata (CC0) Nickel-Strunz (9th) 8.BN.05Wikidata (CC0)
