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

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(00 0)=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 tri gonal prisms, octahedra and planar triangle of oxygen, respectively. The is olated 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 s tructural characteristic will result in a weaker interaction between Nd3+ i ons and a lower fluorescence concentration quenching effect.