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name the parameters that characterise a unit cell explain class12

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question : name the parameters that characterise a unit cell explain class12 ?

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Key points to answer this question : Edges of unit cell and the angles between the Edges of unit cell are the main points to characterize a unit cell.

answer : A unit cell is characterize by following factors –

1. The dimensions of unit cell along the three edges a , b , and c (showing in the figure below)
2. The angles between the edges α , β , γ.  (here α is angle between edge b and c , β is angle between edge a and c , γ is angle between edge a and b)

so we can say that any unit cell can be characterized by six parameters which are a , b , c and α , β , γ.

which includes the edges and angles between the edges of unit cell showed in figure below –

parameters of unit cell figure.

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Class 6

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Class 9

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Class 12