question_answer

A unit cell with edge length \[a\ne b\ne c\] and axial angles \[\alpha =\beta =\gamma =90{}^\circ \] is called

A) cubic

B) tetragonal

C) orthorhombic     

D) hexagonal

Correct Answer: C

Solution :

A unit cell with edge length \[a\ne b\ne c\]and axial angles \[\alpha =\beta =\gamma =90{}^\circ \] is called orthorhoinbic, e.g. rhombic sulphur, \[KN{{O}_{3}}\]\[BaS{{O}_{4}}\]