Structure 12
Prototype: CaF2 (fluorite)
StrukturBericht / Pearson: C1 / cF12

lattice parameters:
CaF2  F2Sr  BaCl2
5.463 5.800 7.311
O2Pb  O2U   Li2O
5.349 5.372 4.611
Na2Se K2S   ORb2
6.823 7.406 6.740

Radius:
Ca: 1.12 (Shannon radius for charge +2 coordination 8)
F:  1.31 (Shannon radius for charge -1 coordination 4)

1. Building with space group (s12.xml):
Group:  225

Wyckoff positions:
Ca 1a
F  2c

View:
Ca: style solid, size 1.0, variancy 1.0, scale 0.3
F: style solid, size 1.0, variancy 1.0, scale 0.3
CaF: style solid, method length, color 0.5,0.5,0.5 scale 0.5
