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Tace El.M.,Laboratoire Of Recherches Of Chimie Physique Generale Des Materiaux | Charaf A.,Laboratoire Of Recherches Of Chimie Physique Generale Des Materiaux | Fahim I.,Laboratoire Of Recherches Of Chimie Physique Generale Des Materiaux | Moutaabbid M.,Laboratoire Of Recherches Of Chimie Physique Generale Des Materiaux | And 6 more authors.
Phosphorus, Sulfur and Silicon and the Related Elements | Year: 2011

Chemical presparation, thermal behavior, and infrared (IR) studies are discussed for the cyclotriphosphate MnK4(P3O 9)2.2H2O and its anhydrous form MnK 4(P3O9)2. The total dehydration of MnK4(P3O9)2.2H2O, between 200 and 550C, leads to its anhydrous form MnK4(P3O 9)2. MnK4(P3O9) 2 is a new cyclotriphosphate crystallizing in the rhombohedral system and is stable until its melting point at 560C. The thermal behavior of MnK 4(P3O9)2.2H2O has been investigated and interpreted by comparison with IR absorption spectrometry and X-ray diffraction experiments. Two different methods, Ozawa and KAS (Kissinger-Akahira-Sunose), were selected in studying the kinetics of thermal behavior of the title compound. Quantum chemical calculations were made for the P3O3-9 ion. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. © 2011 Taylor & Francis Group, LLC. Source

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