Fougèrite Fe2 +4 Fe3 +2 (OH)12 (CO3 )·3 H2 O IMA symbol: Fgè redefined
Fougèrite is an oxide or hydroxide mineral with the formula Fe2+4Fe3+2(OH)12(CO3)·3H2O, crystallizing in the trigonal system. It has a calculated density of 2.597 g/cm3.
Crystallography Crystal system trigonal crystal systemWikidata (CC0) Space group R -3 m :H Cell (Å, °) a = 3.19, b = 3.19, c = 23.85; α = 90, β = 90, γ = 120 Cell volume 210.184 ų, Z = 3 Axial ratios 1.0000:1:7.4765calculated from COD 9011596 Source structure COD 9011596 (Clays and Clay Minerals, 2007)
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 7.95 3.975 2.691 2.026 2.391 1.564 I/I₀ 100 52.8 38.8 30.3 23 15.1
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9011596; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 2.597 g/cm³calculated from COD 9011596
Classification Nickel-Strunz (10th) 4.FL.05Wikidata (CC0) Nickel-Strunz (9th) 4.FL.05Wikidata (CC0)
