Question

Difference between space lattice and crystal lattice

Answer 1

Crystal lattice:
A regular arrangement of the constituent particles, i.e. atoms, ions or molecules of a crystal, in three-dimensional space.
When the constituent particles are represented by dot (.), the periodic and systematic arrangement of these dots in three dimensions is called crystal lattice.

Unit cell:
The smallest three-dimensional portion of a complete space lattice which when repeated over and again in different directions produces the complete space lattice.
If we repeat unit cell in all dimensions, we obtain a structure of the crystal.
The properties of unit cell are measured by length of edges and the angles between the edges.