Man pages matching name xray::spacegroup in section 3pm:

Xray::SpaceGroup.3pm.en	debian 10 / libxray-spacegroup-perl
Xray::SpaceGroup.3pm.en	debian 11 / libxray-spacegroup-perl
Xray::SpaceGroup.3pm.en	debian 12 / libxray-spacegroup-perl