(inorganic chemistry) Any element of group 16 of the periodic table: oxygen, sulphur, selenium, tellurium or polonium.

plural of chalcogen

(inorganic chemistry) Any binary compound of a chalcogen with a more electropositive element.

(inorganic chemistry) Any of several inorganic polymers of sulphur, selenium and tellurium, that are transparent to infrared radiation and are used in optics.

plural of chalcogenide

plural of chalcogenophosphate

plural of chalcogenide glass

(inorganic chemistry) The equivalent of a phosphate in which the oxygen atoms have been replaced by those of a chalcogen