Error case for space groups

[lfoppiano]

Example:
LaOFeAs, a member of the group of quaternary oxypnictides LnOTMPn, has a layered structure belonging to the tetragonal P 4/ nmm space group with lattice constants a 5 0.403552(8) nm and c 5 0.87393(2) nm.

P 4/ nmm is not extracted