With respect to porous solids, the surface associated with pores communicating with
the outside space may be called the
internal surface. Because the accessibility of ores may depend on the size of the fluid molecules,
the extent of the
internal surface may depend on the size of the molecules comprising the fluid, and may be different
for the various components of a fluid mixture. This effect is known as the molecular
sieve effect.
Source:
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
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
