Solid State and Crystal Structures

Wurtzite structure of ZnS is related to hcp structure, whereas zinc blende structure of ZnS is related to ccp structure.

In cesium chloride (CsCl) crystal lattice, coordination number of both cation (Cs⁺) as well as anion (Cl^-) is 8.

For rhombohedral lattice system the only possible Bravais lattices is primitive type.

The crystal structure of CsCl is simple cube.

The number of atoms per unit cell in a bcc crystal is 2.

An example for metal deficiency defect is FeS.

The total number of atoms per unit cell in fcc system is 4.

A mathematical relation to determine the inter atomic distance from x-rays diffraction pattern is Bragg’s equation.

The smallest fundamental repeating portion of a crystal is called unit cell.

Palladium (Pd) and silver (Ag) crystallise in face centred cubic lattice.

Tantalum (Ta) and tungsten (W) crystallise in body centred cubic lattice.

Calcium and strontium crystallizes in face centered cubic structure.

This option is correct because both the statements i.e. there is no difference between fcc and ccp arrangement and in body centered cubic and the space occupied by spheres is 68%, are true statements.

This option is correct because it is formed by unequal length; 7 crystal systems, three basis vectors and it has one peroxo bond.

In fluorspar or fluorite structure, cations are arranged into cubic close packing and the anions occupy all the tetrahedral voids.