Synthesis and characterization of methylammonium phosphates as crystalline approximants for anhydrous, low melting phosphate glasses.

ABSTRACT: Low-melting methylammonium phosphate glasses are synthesized from crystalline starting agents. To this end crystalline tris(methylammonium) cyclotriphosphate [CH₃NH₃]₃P₃O₉, was synthesized by a novel and simple synthesis route from P₄O₁₀ and N-methylformamide. It, undergoes an irreversible phase transition to methylammonium catena-polyphosphate [CH₃NH₃]PO₃. The crystal structure of the catena-polyphosphate was solved and refined from X-ray powder diffraction data by the Rietveld method using constraints obtained by solid-state ³¹P and ¹H NMR spectroscopy. This compound crystallizes in a triclinic space group with a = 13.2236(9),

SUBMITTER: Mangstl M 

PROVIDER: S-EPMC9059716 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature