Macropore

{
  "id": "MLC-T-CHM-006889",
  "term": "Macropore",
  "field": "Chemistry",
  "definition": "A pore within a material that has a diameter exceeding 50 nanometers, according to IUPAC classification. These pores are large enough to allow for unrestricted diffusion of molecules and are often visible under an optical microscope. They contribute significantly to the permeability and bulk transport properties of porous solids.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "mesopore",
    "micropore"
  ],
  "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/macropore/"
}