pseudopolymorph

synonym: pseudopolymorphs
https://doi.org/10.1351/goldbook.15229
Different crystalline form(s) of a solvated compound that differ in the identity and/or the stoichiometry of the solvating molecule.
Source:
PAC, 2009, 81, 971. (Glossary of terms related to pharmaceutics (IUPAC Recommendations 2009)) on page 995 [Terms] [Paper]