Li₃PO₄ crystal has three forms: α, β, λ, at past, they can be obtained by solid-state reaction. In this paper, we report the details of Li₃PO₄ crystals growth using flux system and the results of various characterizations of the grown crystals.

   Transparent single crystals, Li₃PO₄ have been grown by flux method. We analyze the phase transition temperature of Li₃PO₄ crystals, the results indicate that we can obtain two different system β, λ by using two different fluxes.

  The as-grown crystals were characterized by single-crystal X-ray diffraction, differential thermal analysis (DTA) and thermo-gravimetric analysis (TGA) techniques. The results show that the as-grown crystals were well crystallized and indexed in a hexagonal crystal system with space group Pnma. The crystal is stable in the measurement temperature range of 25–1130°C, and the frequencies of the vibration modes of the crystal were also obtained from measurements of the infrared spectrum. X-ray photoelectron spectroscopy (XPS) was employed to measure the chemical or electronic state of each element.

  The results prove that Li₃PO₄ crystals grown by flux method have better characteristic.

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