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

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

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