View More View Less
  • 1 Campus Universitaire Faculté des Sciences, Département de Chimie 1060 Tunis Tunisie 1060 Tunis Tunisie
  • 2 Faculté de Pharmacie Laboratoire de Chimie Physique Minérale et Bioinorganique EA-401 5, Rue J. B. Clément 92290 Châtenay Malabry France 5, Rue J. B. Clément 92290 Châtenay Malabry France
  • 3 Université de Toulon et du Var Laboratoire de Physico-chimie du Matériau et du Milieu Marin 83957 La Garde France 83957 La Garde France
Restricted access


Phase diagram of the binary system AgNO3—RbNO3 was studied using thermal analysis technique, differential scanning calorimetry and X-ray diffraction. This binary exhibits a congruently melting compound Ag0.5Rb0.5NO3 (m. p.=138°C), an incongruently melting one Ag0.33Rb0.66NO3 with two polymorphic varieties, two eutectics at (36 mol% RbNO3, 128°C) and at (60 mol% RbNO3, near 134°C) respectively and a peritectic at (60.5 mol% RbNO3, 141°C). This system contains also three invariant reactions at 164, 222 and 282°C due to the phase transitions of RbNO3 and another one at 164°C due to the phase transition of AgNO3.