The 54 hemisymmorphic space groups contain only axial combination of symmetry elements from the corresponding point groups. Hemisymmorphic space groups contain the axial combination 422, which are P4/mcc ( P 4 m 2 c 2 c , 35h), P4/nbm ( P 4 n 2 b 2 m , 36h), P4/nnc ( P 4 n 2 n 2 c , 37h), and I4/mcm ( I 4 m 2 c 2 m , 38h).