, ▁and ▁ 6 5 . ▁ ▁In ▁Sch o enf lies ▁notation , ▁the ▁symbol ▁of ▁a ▁space ▁group ▁is ▁represented ▁by ▁the ▁symbol ▁of ▁corresponding ▁point ▁group ▁with ▁additional ▁su pers cript . ▁The ▁su pers cript ▁doesn ' t ▁give ▁any ▁additional ▁information ▁about ▁symmetry ▁elements ▁of ▁the ▁space ▁group , ▁but ▁is ▁instead ▁related ▁to ▁the ▁order ▁in ▁which ▁Sch o enf lies ▁derived ▁the ▁space ▁groups . ▁This ▁is ▁som times ▁supp lement ed ▁with ▁a ▁symbol ▁of ▁the ▁form ▁ ▁which ▁spec ifies ▁the ▁bra va is ▁lattice . ▁Here ▁ ▁is ▁the ▁lattice ▁system , ▁and ▁ ▁is ▁the ▁cent ering ▁type . ▁ ▁In ▁Fed or ov ▁symbol , ▁the ▁type ▁of ▁space ▁group ▁is ▁denoted ▁as ▁s ▁( sym m orph ic ▁), ▁h ▁( hem is ym m orph ic ), ▁or ▁a ▁( as ym m orph ic ). ▁The ▁number ▁is ▁related ▁to ▁the ▁order ▁in ▁which ▁Fed or ov ▁derived ▁space ▁groups . ▁There ▁are ▁ 7 3 ▁sym m orph ic , ▁ 5 4 ▁hem is ym m orph ic , ▁and ▁ 1 0 3 ▁asym m orph ic ▁space ▁groups . ▁Sym m orph ic ▁space ▁groups ▁can ▁be ▁obtained ▁as ▁combination ▁of ▁Bra va is ▁l att ices ▁with ▁corresponding ▁point ▁group . ▁These ▁groups ▁contain ▁the ▁same ▁symmetry ▁elements ▁as ▁the ▁corresponding ▁point ▁groups . ▁Hem is ym m orph ic ▁space ▁groups ▁contain ▁only ▁ax ial ▁combination ▁of ▁symmetry ▁elements ▁from ▁the ▁corresponding