摘要
由硝酸锶、氧化钇、氧化钪、氧化硼加热,固相反应制得Sr_6YSc(BO_3)_6晶体。经单晶X射线衍射分析,该晶体属三方晶系,空间群C_(3i)~2-R,按六方晶系定轴,a=12.284(1),c=9.268(2);V=1211.2 ~3,Z=3,D_c:4.16g/cm^3,λ(MoK_a)=0.71069,μ=231.36cm^(-1),F(000)=1386(e)。用1085个衍射数据做分析,最终偏差因子R=0.039,R_(to)=0.043。在光致发光中观察到此晶体比之Cr^(3+):ScBO_3有70nm的蓝移,说明得到了一个较强的晶体场。
The title compound, Sr6YSc(BO3)6, (Mr=1012. 43) was prepared from Sr(NO3)2, Y2O3, Sc2O3 and B2O3. The crystal structure was determined by single crystal X-ray diffraction analysis at room temperature(23℃). The crystal belongs to trigonal space group R 3,a = 12. 284(1) ,c= 9. 268(2) (?) (hexagonal axes), V = 1211. 2(?)3 ,Z = 3,Dc=4. 16g/cm3, the final residuals R =0. 039 and Rw = 0. 043 for 1085 observed reflections. A blue-shift relative to Cr3+ :ScBO3 by 70nm was observed from the peak of luminescene bands of the title compound. This suggested a stronger crystal field is obtained.
