B1, rock salt

Structural typeB1
Common namerock salt
Definitionfcc lattice of large ions with the smaller ions occupying octahedral voids
Pearson symbolcF8
Space group225 Fm-3m Oh5
Chemical formulaAX
Atomic positions  A (4a)   0    0    0   (marked by C)
 X (4b)  1/2  1/2  1/2  (marked by S)
CoordinationAX, XA – 6o
SublatticesA, X – fcc
PDB filesB1
Superstructuressc for A=X
Substancesionic compounds I+VII (NaCl, LiF), II+VI (CaO, MgO, BaS), and rarely III+VII (ScN)