Agrellite NaCa2 Si4 O10 F IMA symbol: Are approved
Agrellite is a silicate mineral with the formula NaCa2Si4O10F, crystallizing in the triclinic system. It has a calculated density of 2.942 g/cm3. Its streak is white.
Crystallography Crystal system triclinic crystal systemWikidata (CC0) Space group P -1 Cell (Å, °) a = 7.759, b = 18.946, c = 6.986; α = 89.88, β = 116.65, γ = 94.32 Cell volume 914.669 ų, Z = 4 Axial ratios 0.4095:1:0.3687calculated from COD 9000709 Source structure COD 9000709 (American Mineralogist, 1979) — 1 of 2 structures
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 3.203 3.161 1.746 3.842 3.051 2.648 I/I₀ 100 89.7 80.1 74.3 72.9 72.3
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9000709; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 2.942 g/cm³calculated from COD 9000709 Streak whitesingle source Wikidata (CC0)
Chemistry (calculated) Molecular weight 394.48 g/molcalculated from the IMA formula Composition (wt%) Na 5.83%, Ca 20.32%, Si 28.48%, O 40.56%, F 4.82%
Classification Nickel-Strunz (10th) 9.DH.75Wikidata (CC0) Nickel-Strunz (9th) 9.DH.75Wikidata (CC0)
