Crystal structures and comparisons of potassium rare-earth molybdates KRE(MoO4)2 (RE = Tb, Dy, Ho, Er, Yb, and Lu).

Autor: Saehwa Chong, Perry, Samuel, Riley, Brian J., Nelson, Zayne J.
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Zdroj: Acta Crystallographica Section E: Crystallographic Communications; Dec2020, Vol. 76 Issue 12, p1871-1875, 27p
Abstrakt: Six potassium rare-earth molybdates KRE(MoO4)2 (RE = Tb, Dy, Ho, Er, Yb, and Lu) were synthesized by flux-assisted growth in K2Mo3O10. The crystal structures were determined using single-crystal X-ray diffraction data. The synthesized molybdates crystallize with the ortho­rhom­bic Pbcn space group (No. 60). Trendlines for unit-cell parameters were calculated using data from the current study. The unit-cell parameters a and c increase linearly whereas b decreases with larger RE cations, based on crystal radii. The unit-cell volumes increase linearly and the densities decrease linearly with larger RE cations. The average distances between the RE cations and the nearest O atoms increase with larger cations whereas the average distances of Mo—O and K—O do not show specific trends. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index