monotectoid reaction

https://doi.org/10.1351/goldbook.M04023
A reaction in a system containing two @M03940@ phases, \(\alpha ^{'}\) and \(\alpha ^{''}\) in which \(\alpha ^{'}\) decomposes into \(\alpha ^{''}\) and a new phase \(\beta \): \[\alpha ^{'}\rightleftharpoons \alpha ^{''}+\beta \]
Source:
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 586 [Terms] [Paper]