Material name Uvarovite
Composition Ca3Cr2(SiO4)3
Chemical formula weight 500.48
System Cubic
Temperature (ºC) r.t.
a (Å), b (Å), c (Å) 11.997(1) 11.997(1) 11.997(1) @
α (deg), β (deg), γ (deg) 90 90 90 @
Unit cell volume (Å3) 1727
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 0.44
Cr 16a 1 0 0 0 0.27
Si 24d 1 3/8 0 1/4 0.25
O 96h 1 0.03917(5) 0.04770(5) 0.65433(5) 0.41
Comment B values were calculated on the basis of Ueq values in the reference.

Reference: M. Andrut and M. Wildner, Physics and Chemistry of Minerals, 29, 595 (2002).