Features of the Synthesis and Crystallization of Mg3BPO7

Abstract

The crystalline phase of Mg₃BPO₇ was obtained by gel combustion method and solid-phase synthesis with optimization of annealing temperatures. The effect of precursors and synthesis conditions on the formation of Mg₃BPO₇ was analyzed by X-ray powder diffraction and IR spectroscopy. It was shown that the formation of a mixture of kotoite Mg₃B₂O₆ and farringtonite Mg₃P₂O₈ prevents the formation of Mg₃BPO₇, whereas a significant excess of periclase MgO promotes the production of Mg₃BPO₇.