Structure of medium temperature phase β-LaSc3(BO3)4 crystal

被引:43
作者
He, MY [1 ]
Wang, G [1 ]
Lin, ZB [1 ]
Chen, WZ [1 ]
Lu, SF [1 ]
Wu, QJ [1 ]
机构
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian 350002, Peoples R China
关键词
crystal structure; lanthanum scandium borate; beta-LaSc3(BO3)(4);
D O I
10.1007/s100190050112
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The compound beta-LaSc3(BO3)(4) crystallizes in the rhombohedral with space group R32 and cell parameters a=9.819(3), c=7.987(1) Angstrom, Z=3, V=666.5(3) Angstrom(3), Dc=3.80 g/cm(3), lambda(MoK alpha)=0.71067 Angstrom, F(000)=708, final R=0.053, R-W=0.072 for 512 observed reflection with I greater than or equal to 3 sigma(I). The La atoms, Sc atoms and B atoms occupy trigonal prisms, octahedra and planar triangle of oxygen, respectively. The isolated LaO6 trigonal prisms alternate along the c-axis with BO3 triangle (B(1)) that are perpendicular to the c-axis. La2+ ions join by means of La-O-Sc(B)-O-La with the distance between La3+ ions being 6.263 Angstrom. This structural characteristic will result in a weaker interaction between Nd3+ ions and a lower fluorescence concentration quenching effect.
引用
收藏
页码:345 / 348
页数:4
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