reconstructive transition
A transition which involves a major reorganization of the crystal structure and a change of local topology, during which primary bonds are broken and reformed so that there is no immediate relationship between the crystal structures of the parent and product phases. Examples: The transition of Mg2SiO4 (olivine) to Mg2SiO4 (spinel); the transition of @D01671@ to @G02684@.
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 589 [Terms] [Paper]