Internal surface

{
  "id": "MLC-T-CHM-005973",
  "term": "Internal surface",
  "field": "Chemistry",
  "definition": "The total surface area of pores, cracks, and other internal structures within a porous material that is accessible to a fluid or gas. This surface contributes significantly to the material's adsorption capacity and catalytic activity. It is often measured by gas adsorption techniques, such as the BET method.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "molecular sieve effect"
  ],
  "references": [
    "PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 585 (https://doi.org/10.1351/pac197231040577)",
    "PAC, 1976, 46, 71. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis' on page 79 (https://doi.org/10.1351/pac197646010071)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/internal-surface/"
}