Diffusionless transition

{
  "id": "MLC-T-CHM-003202",
  "term": "Diffusionless transition",
  "field": "Chemistry",
  "definition": "A phase transition in a solid that occurs without long-range atomic migration or any change in chemical composition. Atoms move in a cooperative, organized manner over distances smaller than the interatomic spacing, leading to a change in crystal structure. Martensitic transformations, which are responsible for the hardness of quenched steel, are a primary example of this type of transition.",
  "subject": "Inorganic Chemistry",
  "see_also": [
    "diffusion"
  ],
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 581 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/diffusionless-transition/"
}