A compound made up of elements A and B crystallises in the cubic structure. Atoms A are present on the corners as well as face centres whereas atoms B are present on the edge centres as well as body centre. What is the formula of the compound ? Draw the structure of its unit cell.

A compound made up of elements A and B crystallises in the cubic struc

1.	A compound made up of elements A and B crystallises in the cubic structure. Atoms A are present on the corners as well as face centres whereas atoms B are present on the edge centres as well as body centre. What is the formula of the compound ? Draw the structure of its unit cell.
Answer» Solution :`{:("ATOMS A/unit cell",=8xx1/8"" +,6xx1/2=4),(,"(CORNERS)","(face-centres)"),("Atoms B/unit cell",=12xx1/4" " +,1=4),(,"(edge-corners)","(body-centres)"):}` `THEREFORE` A:B=4:4=1:1 . So the formula is AB.