【摘要】 用钠蒸气还原ＥｕＰＯ４合成了新化合物ＮａＥｕＰＯ４其结构属三方晶系．空间群Ｐ３ｍｌ，ａ＝５４９．９（２），ｃ＝６９６．１（２）ｐｍ，Ｚ＝２，Ｄｘ＝４．９１７ｇ·ｃｍ（－３），Ｇｌａｓｅｒｉｔｅ（ＫＮａＳＯ４）晶型．在晶体中铕（Ⅱ）和钠离子有序地分布在四个Ｃ（３Ｖ）格位上，具双中心荧光发射３８９．２，４６５．６ｎｍ．它与ＮａＢａＰＯ４可形成无限固溶体并且有很强的荧光．还报道了红外图谱．更多还原

【Abstract】 New compound containing divalcnt rare earth, sodium curopium(Ⅱ) orthophosphatc NaEuPO4, was synthesized by reducing monazite ouropium(Ⅲ) orthophosphatc with sodium vapour under 10(-3)Pa argon at 260-530℃ in a scaled glass double-cell. The product was characterized by ICP, chemical analysis, fluorescence spectroscopy, IR and X-ray powder diffraction.The new compound belongs to KNaSO4 structure type, trigonal, space group P3ml,a= 549.9(2), c= 696.12(2)pm, Z = 2. A series of the solid solutions of NaEuPO4 and NaBaPO4 was also investigated. The crystal structural analysis and fluoreseence spectra of the series give the cvidence that in the crystal lattice of sodium curopium(Ⅱ) orthophosphate curopium ions are located at two different Wyckoff lattice sites with the coordination number 12 and 10, respectively. The fluorescence spectrum of the new compound has two emission peaks at 389 .2 and 465 .6nm, being suggested as a double-central emission.更多还原