Material name Pyrope
Composition Mg3Al2(SiO4)3
Chemical formula weight 403.13
System Cubic
Temperature (ºC) r.t.
a (Å), b (Å), c (Å) 11.4582(5) 11.4582(5) 11.4582(5) @
α (deg), β (deg), γ (deg) 90 90 90 @
Unit cell volume (Å3) 1504.4
Calculated density (g/p3) 3.56
Z 8
Space group Ia3d (No.230)
atom site g x/a y/b z/c B2)
Mg 24c 1 1/8 0 1/4 0.652
Al 16a 1 0 0 0 0.312
Si 24d 1 3/8 0 1/4 0.295
O 96h 1 0.03301(3) 0.05024(3) 0.65329(3) 0.488

Reference: H. Sawada, Journal of Solid State Chemistry, 142, 273 (1999).