Mixed Alkali Neodymium Orthoborates: K9Li3Nd3(BO3)7 and A2LiNd(BO3)2 (A = Rb, Cs)

作者：Chen, Pengyun; Xia, Mingjun; Li, Rukang^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2016, 642(5): 424-430.

DOI：10.1002/zaac.201500804

• Single crystal
• Neodymium
• Orthoborate
• Alkali metals
• Fluorescence spectroscopy

Crystals of mixed alkali neodymium orthoborates, K9Li3Nd3(BO3)(7) and A(2)LiNd(BO3)(2) (A = Rb, Cs) were obtained by spontaneous crystallization. K9Li3Nd3(BO3)(7) crystallizes in space group P2/c with cell parameters of a = 11.4524(7) angstrom, b = 10.1266(6) angstrom, c = 12.3116 (10) angstrom, = 122.0090(10)degrees. In the structure, NdO8 polyhedra share corners and connect with planer BO3 groups to form infinite [Nd3B3O21](n) chains. These chains are linked by additional BO3 groups to produce a double layer of [Nd6B6O38](n) blocks in the ac plane with K and Li ions filled into the cavities. A(2)LiNd(BO3)(2) (A = Rb, Cs) crystallizes in space group Pbcm, with cell parameters of a = 7.113(2) angstrom, b = 9.691(3) angstrom and c = 10.135(3) angstrom for Rb2LiNd(BO3)(2), and a = 7.2113(3) angstrom, b = 9.9621(4) angstrom, and c = 10.3347(4) angstrom for Cs2LiNd(BO3)(2). In the structure, NdO8 polyhedra are corner-sharing with each other and further interlinked by BO3 groups to comprise the infinite [Nd4B4O24] sheets in the bc plane, with Rb/Cs and Li ions occupying the interlayered space. The compounds show effective near-IR emission and their associated lifetimes are obtained by fluorescence spectra.

• 出版日期2016-3
• 单位中国科学院大学; 中国科学院理化技术研究所