Preparation and crystal structure analysis of(Bi2O3)1-x(Sc2O3)x(x=0.01,0.03,0.05)powder crystal
The(Bi2O3)1-x(Sc2O3)x(x=0.01,0.03,0.05)powder crystals were prepared by solid-phase sin-tering.X-ray diffraction experiments were performed on several samples at room temperature,and was used.The Rietveld analytical method in the RIETAN-2000 program and the VEND,PRIMA and VICS programs were used to study the crystal structures,iso-high electron densities(2D and 3D),atomic coordination numbers and atomic thermal vibration isotropy factors B of these samples.The results show that the unit cell volumes(≈329.3399 Å3,329.5016 Å3,329.3400 Å3)of(Bi2O3)1-x(Sc2O3)x(.v=0.01,0.03,0.05)are smaller than that(≈330.3658Å3)of Bi2O3.Atomic thermal vibration isotropic temperature factors B(Sc1),B(Sc2),B(Bi1),B(Bi2),B(O1),B(O2)and B(O3)in(Bi2O3)1-x(Sc2O3)x(x=0.01,0.03,0.05)crystals are respectively 0.42883 Å2,0.54412 Å2,0.609364 Å2,0.502542 Å2,0.4034 Å2,0.61406 Å2 and 0.74259 Å2 for x=0.01;0.43052 Å2,0.52778 Å2,0.51647 Å2,0.382431 Å2,0.320327 Å2,0.516762 Å2 and 0.76875 Å2 for x=0.03;and 0.42347 Å2,61022 Å2,0.514476 Å2,0.302724 Å2,0.34725 Å2,0.56175 Å2 and 0.72125 Å2 for x=0.05.It is determined that the(Bi2O3)1-x(Sc2O3)x(x=0.01,0.03,0.05)powder crystal belongs to the monoclinic system,and the visualization of two-dimensional and three-dimensional high electron density distributions is realized,The crystal structure and atomic positions were further determined.
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