topochemical reaction

Synonym: topotactic reaction
A reversible or irreversible reaction that involves the introduction of a @[email protected] species into a host structure and that results in significant structural modifications to the host, for example, the breakage of bonds. Example: The @[email protected] of lithium at \(50\,^{\unicode{x26ac}}\text{C}\) into the spinel Li[Mn2]O4 with symmetry \(F\,\text{d3m}\) to yield a layered structure with symmetry \(P\bar{3}\,\text{m1}\).
Alternative terms: topotactic reaction, @[email protected] reaction.
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 592 [Terms] [Paper]