Space group 51 · Pmma

· orthorhombic

╌ Non-symmorphic · repeats by rotating and sliding

Number: 51
Symbol: Pmma
Full symbol: P 2_1/m 2/m 2/a
Schoenflies: \Gamma_oD_{2h}^5
Crystal system: orthorhombic
Point group: 2/m 2/m 2/m (mmm) ·
Lattice: P · Primitive
Symmorphic: No
Glide / screw: 2_1,a