▁point ▁groups . ▁All ▁the ▁other ▁space ▁groups ▁are ▁asym m orph ic . ▁Example ▁for ▁point ▁group ▁ 4 / mm m ▁( ): ▁the ▁sym m orph ic ▁space ▁groups ▁are ▁P 4 / mm m ▁( , ▁ 3 6 s ) ▁and ▁I 4 / mm m ▁( , ▁ 3 7 s ); ▁hem is ym m orph ic ▁space ▁groups ▁should ▁contain ▁ax ial ▁combination ▁ 4 2 2 , ▁these ▁are ▁P 4 / m cc ▁( , ▁ 3 5 h ), ▁P 4 / n bm ▁( , ▁ 3 6 h ), ▁P 4 / nn c ▁( , ▁ 3 7 h ), ▁and ▁I 4 / m cm ▁( , ▁ 3 8 h ). ▁ ▁List ▁of ▁Tr ic lin ic ▁ ▁List ▁of ▁Mon oc lin ic ▁ ▁List ▁of ▁Orth or h omb ic ▁ ▁List ▁of ▁T et rag onal ▁ ▁List ▁of ▁Tr ig onal ▁ ▁List ▁of ▁H ex ag onal ▁ ▁List ▁of ▁Cub ic ▁ ▁References ▁ ▁External ▁links ▁▁ ▁International ▁Union ▁of ▁Cry stal log raph y ▁ ▁Point ▁Gr oups ▁and ▁Bra va is ▁L att ices ▁ ▁Full ▁list ▁of ▁ 2 3 0 ▁cry stal log raph ic ▁space ▁groups ▁ ▁Con way ▁et ▁al . ▁on ▁f ibr if old ▁notation ▁ ▁Category : Sym met ry ▁Category : C ry stal log raph y <0x0A> </s> ▁NGC ▁ 3 5 4 ▁is ▁a ▁bar red ▁spir al