Question

For a cubic crystal structure, which one of the following relations indicating the cell characteristics is correct?

• A. $a=b=cand\alpha =\beta =\gamma ={90}^0$
• B. $a\ne b\ne cand\alpha \ne \beta and\gamma \ne {90}^0$
• C. $a\ne b\ne cand\alpha =\beta =\gamma ={90}^0$
• D. $a=b=cand\alpha \ne \beta \ne \gamma ={90}^0$

Answer 1

The correct option is A $a=b=cand\alpha =\beta =\gamma ={90}^0$

From the table, cell characteristic of cubic crystal structure is

$a=b=c$ and $\alpha =\beta =\gamma ={90}^o$

So answer is option A.