Material name Garnet (Almandine)
Composition Fe3Al2(SiO4)3
Chemical formula weight 497.75
System Cubic
Temperature (ºC) 20
a (Å), b (Å), c (Å) 11.525(1) 11.525(1) 11.525(1) @
α (deg), β (deg), γ (deg) 90 90 90 @
Unit cell volume (Å3) 1531
Calculated density (g/p3) 4.32
Z 8
Space group Ia3d (No.230)
atom site g x/a y/b z/c B2)
Fe 24c 1 1/8 0 1/4 0.462
Al 16a 1 0 0 0 0.211
Si 24d 1 3/8 0 1/4 0.172
O 96h 1 0.03401(3) 0.04901(4) 0.65278(4) 0.344

Reference: C.A. Geiger, T. Armbruster, G.A. Lager, K. Jiang, W. Lottermoser, and G. Amthauer, Physics and Chemistry of Minerals, 19, 121 (1992).