Faustite ZnAl6 (PO4 )4 (OH)8 ·4 H2 O IMA symbol: Fst grandfathered
Faustite is a phosphate, arsenate, or vanadate mineral with the formula ZnAl6(PO4)4(OH)8·4H2O, crystallizing in the triclinic system. It has a calculated density of 2.912 g/cm3.
Crystallography Crystal system triclinic crystal systemWikidata (CC0) Space group P -1 Cell (Å, °) a = 7.419, b = 7.629, c = 9.905; α = 69.17, β = 69.88, γ = 64.98 Cell volume 462.236 ų, Z = 1 Axial ratios 0.9725:1:1.2983calculated from COD 9009516 Source structure COD 9009516 (Mineralogical Magazine, 2000)
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 3.676 2.89 6.156 3.442 2.915 2.018 I/I₀ 100 66.6 48.8 41.8 32 30.6
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009516; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 2.912 g/cm³calculated from COD 9009516
Chemistry (calculated) Molecular weight 815.3 g/molcalculated from the IMA formula Composition (wt%) Zn 8.02%, Al 19.86%, P 15.2%, O 54.95%, H 1.98%
Classification Nickel-Strunz (10th) 8.DD.15Wikidata (CC0) Nickel-Strunz (9th) 8.DD.15Wikidata (CC0) Dana (8th) 42.9.3.3Wikidata (CC0)
