Ekanite Ca2 ThSi8 O20 IMA symbol: Ek approved
Ekanite is a silicate mineral with the formula Ca2ThSi8O20, crystallizing in the tetragonal system. It has a calculated density of 3.419 g/cm3. Its streak is white.
Crystallography Crystal system tetragonal crystal systemWikidata (CC0) Space group I 4 2 2 Cell (Å, °) a = 7.483, b = 7.483, c = 14.893; α = 90, β = 90, γ = 90 Cell volume 833.938 ų, Z = 2 Axial ratios 1.0000:1:1.9902calculated from COD 9004161 Source structure COD 9004161 (The Canadian Mineralogist, 1982)
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 4.137 3.343 6.686 3.265 2.639 7.446 I/I₀ 100 82.5 82.5 79 52.2 49.3
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9004161; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 3.419 g/cm³calculated from COD 9004161 Streak whitesingle source Wikidata (CC0)
Chemistry (calculated) Molecular weight 856.87 g/molcalculated from the IMA formula Composition (wt%) Ca 9.35%, Th 27.08%, Si 26.22%, O 37.34%
Classification Nickel-Strunz (10th) 9.EA.10Wikidata (CC0) Nickel-Strunz (9th) 9.EA.10Wikidata (CC0) Dana (8th) 72.1.1.1Wikidata (CC0)
