Abstract

The optical spectra of the molten systems MF–YbF₃ (M = Li, Na, K, and Cs) are presented. The spectral data show that complex \({\text{YbF}}_{{\text{6}}}^{{{\text{3}} - }}\) groups form in these melts. The \({\text{YbF}}_{{\text{6}}}^{{{\text{4}} - }}\) group is found in the LiF–YbF₃ melt. This group forms due to the partially reductive atmosphere in a furnace combined with an optical cell. The sharp jump of the wavenumber of the electronic transition ²F_7/2 → Γ₈²F_5/2 of the Yb(III) ion on going from the LiF and NaF melts to the KF and CsF melts is assumed to be caused by a decrease in the coordination number from 14 to 13.

中文翻译：

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熔融碱性金属氟化物中Yb（III）离子的光谱

摘要

给出了熔融系统MF–YbF _3的光谱（M = Li，Na，K和Cs）。光谱数据表明，在这些熔体中形成了复杂的\（{{text {YbF}} _ {{\ text {6}}} ^ {{{\ text {3}}-}} \）基团。的\（{\文本{为YbF}} _ {{\文本{6}}} ^ {{{\文本{4}} - }} \）基团在该LiF-为YbF发现₃熔体。该组的形成是由于在结合有光学电池的熔炉中的部分还原气氛。电子跃迁的波数的大幅上升² ˚F _7/2 →Γ ₈ ² ˚F _5/2 从LiF和NaF熔体到KF和CsF熔体的Yb（III）离子的变化被认为是由于配位数从14降低到13引起的。