A single crystal of CsLa(PO3)4has been successfully grown, and it exhibits a remarkable deep-UV cutoff edge of 167 nm.

Deep-ultraviolet nonlinear optical crystals are of great importance as key materials in generating coherent light with wavelength below 200 nm through cascaded frequency conversion of solid-state lasers. However, the solely usable crystal in practice, KBe2BO3F2 (KBBF), is still commercially unavailable because of the high toxicity of beryllium-containing and the extreme difficulty of crystal growth. Here, we report the crystal growth and characteristics of an beryllium-free polyphosphate, KLa(PO3)4. Centimeter-sized single crystals have been easily obtained by the flux method and slow-cooling technique. The second-harmonic generation efficiency of KLa(PO3)4 powder is 0.7 times that of KH2PO4; moreover, the KLa(PO3)4 crystal is phase-matchable. Remarkably, the KLa(PO3)4 crystal exhibits an absorption edge of 162 nm, which is the shortest among phase-matchable phosphates so far. These attributes make KLa(PO3)4 a possible deep-ultraviolet nonlinear optical crystal. An analysis of the dipole moments of the polyhedra and theoretical calculations by density functional theory were made to elucidate the structure-properties relationships of KLa(PO3)4.

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Abstract. With the development of our agriculture, the utilization of edible mushrooms is more and more widely recognized. The resources of them are abundant in our country, especially in Sichuan. They contain not only rich nutrients, but also active substances such as polysaccharides, which with the biological activity of anti-tumor, anti-diabetic, antifungal and anti-viral. Though edible mushrooms have become the polar industry of Sichuan, still many problems concerning the food safety of edible mushrooms need to be solved. This paper conducts a clear exposition of rich edible mushrooms resources and problems existing in processing and utilization of edible mushrooms in Sichuan.