The lacttice parameter of `GaAs` (radius of `Ga = 1.22 Å, As = 1.25 Å`) is

The lattice parameters of a given crystal are a = 5.62 Å , b = 7.41 Å and c= 9.48Å . The three cordinate axes are mutually perpendicular to each other. The crystal is:

The lattice parameters of a given crystal are a = 5.62 Å , b = 7.41 Å and c= 9.48Å . The three cordinate axes are mutually perpendicular to each other. The crystal is:

If the lattice parameter for a crystalline structure is 3.6Å , then the atomic radius is fcc crystals is

If the lattice parameter for a crystalline structure is 3.6Å , then the atomic radius is fcc crystals is

1 Å is equal to

The ionic radii of F^(-) and O^(2-) respectively are 1.33 Å and 1.4 Å, while the covalent radius of N is 0.74 Å. The correct statement for the ionic radius of N^(3-) from the following is :