CONVENIENT SYNTHESES AND PHYSICAL PROPERTIES OF VARIOUS CYCLO-DECAPHOSPHATES

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Cyclo-decaphosphate, Ba₂Zn₃P₁₀O₃₀, was prepared by mixing BaCO₃, ZnCO₃, and H₃PO₄ ( Ba:Zn:P=2:3:10 ) and heating the mixture at 500°C for 2h. The phosphate obtained was treated with K₂SO₄ and Na₂S aqueous solution to prepare K₄Na₆P₁₀O₃₀ nH₂O. Treated with AgNO₃ aqueous solution, Ag₁₀P₁₀O₃₀ nH₂O was. prepared. This silver salt was used for Boullé's process. The phosphates obtained in this study were characterized with XRD, HPLC-FIA, TG-DTA, and FT-IR. Alkali and alkaline-earth metals, Mn, Ni, and Co cyclo-decaphosphates were obtained in a high state of purity. However, Fe and Cu salts were somewhat decomposed, and decaphosphates were selectively formed. Their thermal stability were relatively low.