topochemical reaction

Synonym: topotactic reaction
https://doi.org/10.1351/goldbook.T06395
A reversible or irreversible reaction that involves the introduction of a
guest
species into a host structure and that results in significant structural modifications to the host, for example, the breakage of bonds. Example: The
insertion
of lithium at 50C into the spinel Li[Mn2]O4 with symmetry Fd3m to yield a layered structure with symmetry P3¯m1.
Alternative terms: topotactic reaction,
insertion
reaction.
Source:
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 592 [Terms] [Paper]