isotopically modified

https://doi.org/10.1351/goldbook.I03337
Describes a compound that has a macroscopic composition such that the isotopic ratio of @[email protected] for at least one element deviates measurably from that occurring in nature. It is either an @[email protected] compound or an @[email protected] compound.
Sources:
Blue Book, p. 514 [Terms] [Book]
PAC, 1981, 53, 1887. (Nomenclature of inorganic chemistry: II.1 - Isotopically modified compounds) on page 1889 [Terms] [Paper]