Publication detail

Smart Approach to the Synthesis of the Rare Fhosphate Na9Co3(PO4)5 Using Solid State Reaction

Authors: Gorodylova Nataliia Oleksandrivna | Šulcová Petra

Year: 2016

Type of publication: ostatní - článek ve sborníku

Name of source: XXXVIII National Congress On Calorimetry, Thermal Analysis And Applied Thermodynamics : book of abstracts

Publisher name: Associazione Italiana di Calorimetria e Analisi Termica

Place: Catania

Page from-to: 33-33

Titles:

Language	Name	Abstract	Keywords
eng	Smart Approach to the Synthesis of the Rare Fhosphate Na9Co3(PO4)5 Using Solid State Reaction	Na9Co3(PO4)5 is an extremely rare phosphate, which has been synthesised before only twice and is mentioned only in three relevant publications . For the first time, Na9Co3(PO4)5 was obtained in 1978 during the study on phase diagram of Na3PO4-Co3(PO4)2 system. The author reported that Na9Co3(PO4)5 is a product of solid state reaction between Na3PO4 and Co3(PO4)2 in molar ratio 3:1 and the thermal stability of this phosphate is limited to 338 oC. Since then, Na9Co3(PO4)5 was obtained again only recently, in 2014, using a completely different synthesis approach. The authors employed NaNO3 melts containing Co2P4O12 in molar ratio 7:1. Na9Co3(PO4)5 formed at 400 oC under isothermal exposure of 2 h. The authors also reported intensive dark purple colour of this compound that is very untypical for double cobalt phosphates which are usually light coloured. The bright colouration of this phosphate has attracted our attention in view of its possible application as a pigment. The main focus of this contribution is on unusual approach to the synthesis of Na9Co3(PO4)5 phosphate using solid state reaction and the benefits which it brings regarding its colouring properties and thermal stability.	Na3PO4-Co3(PO4)2 system; Na9Co3(PO4)5;solid state reaction;pigments

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