AB2_cF12_225_a_c & a --params=5.4631 & Fm(-3)m O_h^5 #225 (ac) & cF12 & C1 & CaF2 & Fluorite & S. Speziale and T. S. Duffy, Phys. Chem. Minerals 29, 465-472 (2002) 1.0000000000000000 0.00000000000000 2.73155000000000 2.73155000000000 2.73155000000000 0.00000000000000 2.73155000000000 2.73155000000000 2.73155000000000 0.00000000000000 Ca F 1 2 Direct 0.00000000000000 0.00000000000000 0.00000000000000 Ca (4a) 0.25000000000000 0.25000000000000 0.25000000000000 F (8c) 0.75000000000000 0.75000000000000 0.75000000000000 F (8c)