Holmquistite ܆Li2 (Mg3 Al2 )Si8 O22 (OH)2 IMA symbol: Hlm redefined
Holmquistite is a silicate mineral with the formula ܆Li2(Mg3Al2)Si8O22(OH)2, crystallizing in the orthorhombic system. It has a calculated density of 3.093 g/cm3.
Crystallography Crystal system orthorhombic crystal systemWikidata (CC0) Space group P n m a Cell (Å, °) a = 18.277, b = 17.65, c = 5.2736; α = 90, β = 90, γ = 90 Cell volume 1701.21 ų, Z = 4 Axial ratios 1.0355:1:0.2988calculated from COD 9003715 Source structure COD 9003715 (American Mineralogist, 2005) — 1 of 12 structures
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 8.115 3.002 2.793 4.412 2.533 2.643 I/I₀ 100 64.5 40.2 35.4 31.1 29
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9003715; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 3.093 g/cm³calculated from COD 9003715
Classification Nickel-Strunz (10th) 9.DD.05Wikidata (CC0) Nickel-Strunz (9th) 9.DE.05Wikidata (CC0) Dana (8th) 66.1.2.9Wikidata (CC0)
