Material name Andradite
Composition Ca3Fe2(SiO4)3
Chemical formula weight 508.17
System Cubic
Temperature (ºC) 20
a (Å), b (Å), c (Å) 12.063(1) 12.063(1) 12.063(1) @
α (deg), β (deg), γ (deg) 90 90 90 @
Unit cell volume (Å3) 1755
Calculated density (g/p3) 3.85
Z 8
Space group Ia3d (No.230)
atom site g x/a y/b z/c B2)
Ca 24c 1 1/8 0 1/4 0.433(4)
Fe 16a 1 0 0 0 0.267(3)
Si 24d 1 3/8 0 1/4 0.267(6)
O 96h 1 0.03934(4) 0.04860(4) 0.65534(4) 0.425(7)

Reference: T. Armbruster and C.A. Geiger, European Journal of Mineralogy, 5, 59 (1993).