Question

a cubic unit cell contains manganese ions at the Corners and fluoride ions at the of center of each face
a) what is the empirical formula?
b) what is the C.N. of Mn²+ ion?
c) calculate the edge length of the unit cell if the radius of Mn²+ ion is 0.65A and that of F - ion is 1.36A.

Answer 1

c) Mn^2+ 1.3A and F 3.84A