Mixed Alkali Neodymium Orthoborates: K9Li3Nd3(BO3)7 and A2LiNd(BO3)2 (A = Rb,Cs) |
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| Authors: | Pengyun Chen Mingjun Xia Rukang Li |
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| Institution: | 1. Beijing Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China;2. University of Chinese Academy of Sciences, Beijing, 100049, P. R. China |
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| Abstract: | Crystals of mixed alkali neodymium orthoborates, K9Li3Nd3(BO3)7 and A2LiNd(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) Å, b = 10.1266(6) Å, c = 12.3116 (10) Å, β = 122.0090(10)°. 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. A2LiNd(BO3)2 (A = Rb, Cs) crystallizes in space group Pbcm, with cell parameters of a = 7.113(2) Å, b = 9.691(3) Å and c = 10.135(3) Å for Rb2LiNd(BO3)2, and a = 7.2113(3) Å, b = 9.9621(4) Å, and c = 10.3347(4) Å 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. |
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| Keywords: | Single crystal Neodymium Orthoborate Alkali metals Fluorescence spectroscopy |
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