Space group 74 · Imma

· orthorhombic

╌ Non-symmorphic · repeats by rotating and sliding

Number: 74
Symbol: Imma
Full symbol: I 2/m 2/m 2/a
Schoenflies: \Gamma_o^vD_{2h}^{28}
Crystal system: orthorhombic
Point group: 2/m 2/m 2/m (mmm) ·
Lattice: I · Body-centred
Symmorphic: No
Glide / screw: a