Question

What are the Parameters That Characterise A Unit Cell

Answer 1

Explanation:

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Answer 2

Answer:

A unit cell is characterised by following parameters

(1) Edges or edge lengths: The intersection of two faces of crystal lattice is called as edge. The three edges denoted by a, b and c represent the dimensions (lengths) of the unit cell along three axes. These edges may or may not be mutually perpendicular.

(2) Angles between the edges (or planes): There are three angles between the edges of the unit cell represented as α, β and gamma.

i)The angle α is between edges b and c.

ii) The angle β is between edges a and c.

iii) The angle gamma is between edges a and b. The crystal is defined with the help of these parameters of its unit cell