SELECT * FROM question_mgmt as q WHERE id=654 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=56 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry The Solid State name the parameters that characterize a unit cell

Question:

Name the parameters that characterize a unit cell.

Answer:

 

A unit cell is the smallest repeating unit in space lattice which when repeated over and over again produces the complete space lattice. It represents the shape of entire crystal. The parameters which characterizes a unit cell are as follows:

1 Relative lengths (distance) of the edges along the three axis (a, b, c). These edges may or may not be equal.

2 Angle between the edges (α, β, γ).The angle α is between the edges b & c, angle β is between the edges c & a, and angle γ is between the edges a & b.


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