Man pages matching name xray::absorption::chantler in section 3pm:

Xray::Absorption::Chantler.3pm.en	debian 10 / libxray-absorption-perl
Xray::Absorption::Chantler.3pm.en	debian 11 / libxray-absorption-perl
Xray::Absorption::Chantler.3pm.en	debian 12 / libxray-absorption-perl