What are the Parameters That Characterise A Unit Cell
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you should study your science book properly
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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
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