Alacránite As8 S9 IMA symbol: Acr renamed
Alacránite is a sulfide or sulfosalt mineral with the formula As8S9, crystallizing in the monoclinic system. It has a calculated density of 3.491 g/cm3. Its streak is amber.
Crystallography Crystal system monoclinic crystal systemWikidata (CC0) Space group P 1 2/c 1 Cell (Å, °) a = 9.9342, b = 9.5566, c = 9.1104; α = 90, β = 102.397, γ = 90 Cell volume 844.749 ų, Z = 2 Axial ratios 1.0395:1:0.9533calculated from COD 9016439 Source structure COD 9016439 (American Mineralogist, 2012) — 1 of 2 structures
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 5.849 2.925 3.031 3.064 3.256 5.052 I/I₀ 100 99.1 76.9 75.2 65.1 58.2
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9016439; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 3.491 g/cm³calculated from COD 9016439 Streak ambersingle source Wikidata (CC0)
Chemistry (calculated) Molecular weight 887.96 g/molcalculated from the IMA formula Composition (wt%) As 67.5%, S 32.5%
Classification Nickel-Strunz (10th) 2.FA.20Wikidata (CC0) Nickel-Strunz (9th) 2.FA.20Wikidata (CC0) Dana (8th) 2.8.22.Wikidata (CC0)
