New niobate crystal Ba2.6Na0.4Cu0.2Nb4.8O15 was synthesized in BaO-Na2O-CuO-Nb2O5 system.Its morphology,optical properties,melting point and chemical stability were studied.X-ray power diffraction study determined that this compound is orthorhombic tungsten bronze structure with space group Cmm2 and lattice parameters a=17.692(2),b=17.684(2),c=3.998(2).The new compound may be one kind of photorefractive crystals.
参考文献
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