micropore

in catalysis
https://doi.org/10.1351/goldbook.M03906
Pore with width not exceeding about \(2.0\ \text{nm}\) (\(20\ \mathrm{Å}\)).
See:
macropore (in catalysis)
,
mesopore (in catalysis)
Sources:
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 [Terms] [Paper]
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 [Terms] [Paper]