View More View Less
  • 1 Universite Lyon I Laboratoire de Physico-Chimie Minerale II, Associe au C.N.R.S. Nℴ 116 43 Boulevard 69622 Villeurbanne, Cedex 43 Boulevard 69622 Villeurbanne, Cedex
  • 2 Produits-Chimiques Ugine Kuhlmann Usine de Jarrie 38560 Jarrie Usine de Jarrie 38560 Jarrie
  • 3 Universite de Toulon et du var Laboratoire de Chimie Marine et de Physico-Chimie 83130 Chateau Saint-Michel La Garde France 83130 Chateau Saint-Michel La Garde France
Restricted access

The solid ⇌ solid equilibria in the binary system Ca3(PO4)2-CaNaPO4 have been studied. Different diagrams have been proposed for this system. The differences relate to the limits of the field of existence of a non-stoichiometric phase (phase A) stable at high temperature and undergoing eutectoid decomposition during cooling; they can be explained by the existence of two metastable equilibria diagrams which are superposed in the stable diagram. These metastabilities depend on both the cooling rates and the maximum temperatures reached before this cooling.