Question

Find the unit cell (simple, bcc, fcc), type of holes where the smaller ions are found (tetrahedral, octrahedral, cubic), and number of cations and anions per unit cell for the following compounds:
CdSe
CsI
Li2O
KBr
NaCl
ZnS(I)
i did this and i got most of my answers wrong!!!
and I got this but they're wrong so any help would be great!:
CdSe - fcc, tetrahedral, 3,3
CsI - fcc, octahedral,1,1
Li2O - sc, tetrahedral, 2,2
KBr - bcc, tetrahedral,4,8
NaCl - bcc, cubic,1,2
ZnS(I) - sc, cubic,1,1

Answer 1

CdSe: fcc, tetra, 4, 4
CsI: sc, cubic, 1,1
Li2O: fcc, tetra, 8, 4
KBr: fcc, octa, 4, 4
NaCl: fcc, octa, 4, 4
ZnS: fcc, tetra, 4, 4

Answer 2

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