Phase

{
  "id": "MLC-T-CHM-008730",
  "term": "Phase",
  "field": "Chemistry",
  "definition": "A portion of a system whose chemical composition and physical state are the same throughout, set off from the rest of the system by a definite boundary. Density, refractive index and crystal structure take the same values everywhere inside it. A system may contain one or several phases at equilibrium, as ice, liquid water and water vapor do at the triple point.",
  "subject": "Inorganic Chemistry",
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 588 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/phase/"
}