Question

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have co-ordination number of eight. The crystal class is:

Simple cubic
Body centred cube
Face-centred cube
None of these

Answer 1

I hope the answer is simple cubic

Answer 2

The crystal class is body centered cube.

It is possible to describe all the crystal structures as a lattice; with it atom groups are attached to each lattice point.

The "group of atoms" is called basis; when the group of atoms are repeated in space, a structure of a crystal is formed. In a "three-dimensional periodic pattern", the arrangement of atoms is in a crystal in straight rows.

The unit cell shape is the same for a given "crystal structure", but it "varies from crystal to crystal". Studies of X-ray diffraction reveal that the particles of a component particles are positioned in the crystal in a definite pattern.