Question

The correct unit cell dimensions for tetragonal crystal system is

• A. $a=b=c$ and $\alpha =\beta =\gamma =90^o$
• B. $a=b\ne c$ and $\alpha =\beta =\gamma =90^o$
• C. $a\ne b\ne c$ and $\alpha =\beta =\gamma =90^o$
• D. $a=b\ne c$ and $\alpha =\beta =90^o,\gamma =120^o$

Answer 1

Answer: (B)

Tetragonal system has the unit cell dimension $a=b\ne c,\alpha =\beta =\gamma =90^{\circ }$ .