The solubility and interaction of <$E roman {Mn sub 2 O sub 3}> infusions of the system <$E roman {M sub 2 O~-~P sub 2 O sub 5~-~Mn sub 2 O sub 3}> - (MF) (where M - Li, Na, K) at temperatures 650 - 950 <$E symbol Р>C and mole correlations from 0,5 to 2,0 moles are analyzed. The influence of the fluorides of alkaline metals on the fusion and interaction in the systems <$E roman {M sub 2 O~-~P sub 2 O sub 5~-~Mn sub 2 O sub 3}> - MF is considered as well. It is shown that the content of <$E roman {Mn sub 2 O} sub 3> grows from Li- to K-consisting systems in liquid equilibrium phases. Ranges for the existence of the derived phosphate compounds are determined, and the optimum conditions for their synthesis are chosen. The influence of the initial relation <$E roman {M sub 2 O~-~P sub 2 O sub 5}>, and quantity of <$E roman {Мn sub 2 О sub 3}> on the compounds is described. Complete chemical analysis of the derived double phosphates is made. All synthesized phosphates are investigated by the IR-method, method of electronic spectroscopy, X-ray and thermogravimetric methods. Using the complete X-ray analysis, the crystal structures of phosphates <$E roman {NaMn (PO sub 3) sub 3}>, <$E roman {NaMa sub 6 P sub 7 O sub 24}>, <$E roman {Na sub 2 Mn sub 3 (P sub 2 O sub 7) sub 2}>, <$E roman {Na sub 2 MnP sub 2 O sub 7}>, <$E roman {KMn sub 6 P sub 7 O sub 24}>, and <$E roman {Li sub 2 Mn (PO sub 4) sub 3}> are found.

• Слободяник Михайло Семенович (соціальні комунікації)
• Нагорний Павло Григорович (хімічні науки)
• Лаврик Руслан Володимирович (хімічні науки)

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