topochemical reaction

Synonym: topotactic reaction
A reversible or irreversible reaction that involves the introduction of a @G02711@ species into a host structure and that results in significant structural modifications to the host, for example, the breakage of bonds. Example: The @I03058@ 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 \(P\overline{3}\text{m1}\). Alternative terms: topotactic reaction, @I03058@ reaction.
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 592 [Terms] [Paper]