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

来源：

MATERIALS RESEARCH INNOVATIONS | 1999年 / 2卷 / 06期

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

页码：345 / 348

页数：4

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