Rotator phase transition

Term · Chemistry · MLC-T-CHM-010431

A type of phase transition in which molecules or molecular groups within a solid crystal gain rotational freedom. Below the transition temperature, these groups are orientationally ordered, but above it, they can rotate more freely. This transition is often accompanied by a change in crystal symmetry and an increase in heat capacity.

Table 1. Record
Identifier	MLC-T-CHM-010431
Field	Chemistry
Subject	Inorganic Chemistry
References	PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 589 (https://doi.org/10.1351/pac199466030577)

Record as JSON

{
  "id": "MLC-T-CHM-010431",
  "term": "Rotator phase transition",
  "field": "Chemistry",
  "definition": "A type of phase transition in which molecules or molecular groups within a solid crystal gain rotational freedom. Below the transition temperature, these groups are orientationally ordered, but above it, they can rotate more freely. This transition is often accompanied by a change in crystal symmetry and an increase in heat capacity.",
  "subject": "Inorganic Chemistry",
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 589 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/rotator-phase-transition/"
}

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