The Faience – Panet rule is an empirically established rule by C. Fayans and F. Panet ( 1913 ), according to which the radioactive isotope present in a solution in microconcentrations in the form of a cation is the more adsorbed by the precipitated or pre-formed precipitate, the less the solubility of the compound that forms this cation with anion sediment. The Faience – Panet rule is applicable for coprecipitation in radiochemistry .
A different formulation of this rule (also called the Faience – Peskov – Panet rule) states that on the surface of a solid substance ions are mainly adsorbed that can complete the crystal lattice , that is, they are part of it, are isomorphic or form an insoluble compound with ions that make up the crystalline grill. This formulation is used to determine the sign of the surface charge in the formation of DES in colloidal chemistry . [one]
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Literature
- Zefirov N.S. et al. 4 Half-Three // Chemical Encyclopedia. - M .: Big Russian Encyclopedia, 1995 .-- 639 p. - 20,000 copies. - ISBN 5-85270-092-4 .