Thermal properties of Zn and Co(II) dihydrogenphosphate solid solution

 

Chem. Met. Alloys 10 (2017) 1-6

 

N.M. ANTRAPTSEVA, L.B. OVAL, I.S. NOVAK

 

The thermal properties of the solid solution Zn1-xCox(H2PO4)22H2O (0 < x < 1.00) were investigated. It was found that the thermal stability of the dihydrogenphosphates correlates with the cationic composition and increases with increasing cobalt(II) content. The composition-dependent temperature range of formation and thermal stability of the products of partial and complete dehydration were determined. It was established that the final product of dehydration is a cyclotetraphosphate solid solution of composition (Zn1‑xCox)2P4O12, 0 < x < 1.00 (monoclinic, space group C2/c, Z = 4), which remains stable when heated to 900C. A sequence of solid-phase transformations taking place during the heat treatment is proposed.

 

 

Thermal properties of Zn0.5Co0.5(H2PO4)22H2O.

 

Keywords

Phosphates / Solid solutions / Thermal properties