Solid StateHard
Question
Element X crystllizes in a 12 co-ordination of fcc lattice. On applying high temperature it changes to 8 co-ordination bcc lattice. If r is the radius of atom X, then :
Options
A.Edge length of unit cell in 12 co-ordination lattice is 2√2 r
B.Edge length of unit cell in 8 co-ordination lattice is 
C.Ratio of densities before and after applying high temperature is 2(√2)3 ; (√3)3
D.All of these
More Solid State Questions
A close packing consists of a base of spheres, followed by a second layer where each sphere rests in the hollow at the j...The distance between adjacent, oppositely charged ions in rubidium chloride is 3.285 A0; in potassium chloride is 3.139 ...Glass is a...In a body centered cubic cell (BCC), what is the value of lattice parameter, if the atomic radius is r:-...Choose the correct statements...