The double phosphates M super(I)M super(II) PO sub(4) (M super(I) - Na, K; M super(II) - Mg, Mn, Co, Ni, Zn) - synthesis from chloride melts and characterization

• Published in: Crystal research and technology (1979) 2015-08, Vol.50 (8), p.626-632
• Main Authors: Livitska, Oksana V, Strutynska, Nataliia Yu, Zatovsky, Igor V, Slobodyanik, Nikolay S
• Format: Article
• Language: English
• Subjects: Chlorides; Melts; Nickel; Phosphates; Reduction; Reflectance; Synthesis; Zinc
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/crat.201500028

The particularities of the chemical interaction in systems M super(I)PO sub(3)-M super(II)O(or Mn sub(2)O sub(3))-M super(I)Cl (M super(I) - Na, K; M super(II) - Mg, Co, Ni, Zn) have been investigated at the temperature 1073 K and molar ratios P/M super(x) = 1 or 2 and M super(I)Cl/(M super(I)PO sub(3) + M super(II)O(or Mn sub(2)O sub(3))) = 30. The conditions of formation of complex phosphates M super([ETH])M super(I I)PO sub(4) and Na sub(4)Ni sub(3)(PO sub(4 )) sub(2)P sub(2)O sub(7) have been found. Influences of the nature of alkali and bivalent metals on the products composition were discussed. The advantages of chloride melts using (synthesis time reduction and temperature reducing) for preparing of complex phosphates were shown. The synthesized compounds have been characterized using the powder X-ray diffraction, Fourier transform infrared and diffuse reflectance spectroscopies. This work describes peculiarities of synthesis of complex phosphates M super(I)M super(II) PO sub(4) (M super(I) - Na, K; M super(II) - Mg, Mn, Co, Ni, Zn) and Na sub(4)Ni sub(3)(PO sub(4 )) sub(2)P sub(2)O sub(7) in chloride melts. Obtained compounds were investigated using the powder X-ray diffraction, Fourier transform infrared spectroscopy and Diffuse reflectance spectroscopy. The main advantages of proposed approach such as synthesis time reduction, temperature reducing and possibility of crystal size control were shown.