Austinite CaZn(AsO4 )(OH) IMA symbol: Aus grandfathered
Austinite is a phosphate, arsenate, or vanadate mineral with the formula CaZn(AsO4)(OH), crystallizing in the orthorhombic system. It has a calculated density of 4.308 g/cm3. Its streak is white.
Crystallography Crystal system orthorhombic crystal systemWikidata (CC0) Space group P 21 21 21 Cell (Å, °) a = 7.5092, b = 9.0438, c = 5.9343; α = 90, β = 90, γ = 90 Cell volume 403.008 ų, Z = 4 Axial ratios 0.8303:1:0.6562calculated from COD 9009509 Source structure COD 9009509 (Mineralogical Magazine, 1997) — 1 of 2 structures
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 3.173 2.798 2.639 1.615 2.597 2.53 I/I₀ 100 97.8 92.3 49.6 47 46.2
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9009509; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 4.308 g/cm³calculated from COD 9009509 Streak whitesingle source Wikidata (CC0)
Chemistry (calculated) Molecular weight 261.41 g/molcalculated from the IMA formula Composition (wt%) Ca 15.33%, Zn 25.02%, As 28.66%, O 30.6%, H 0.39%
Classification Nickel-Strunz (10th) 8.BH.35Wikidata (CC0) Nickel-Strunz (9th) 8.BH.35Wikidata (CC0)
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