Question

The unit cell dimensions of a cubic lattice (edges a, b, c and the angles between them, $\alpha, \beta$ and $\gamma$) are

• A. $a = b = c, \alpha = \beta = \gamma = 90^0$
• B. $a = b \neq c, \alpha = \beta = \gamma = 90^0$
• C. $a = b = c,\alpha = \gamma = 90^0, \beta \neq 90^0$
• D. $a \neq b \neq c,a = b = 90^0, \gamma \neq 90^0$

Answer 1

Answer: (A)

$a = b = c, \alpha = \beta = \gamma = 90^0$

Answer 2

It is based on the definition of the cubic lattice.