Distorted Te nets in the modulated crystal structures of RETe1.94(1) (RE = La, Pr, Nd).
Distorted Te nets in the modulated crystal structures of RETe1.94(1) (RE = La, Pr, Nd).
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RETe1 94(1) 调制晶体结构中扭曲的 Te 网(RE = La、Pr、Nd)
DOI:
10.1107/s2052520620013797
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Th. Doert
中科院分区:
文献类型:
--
作者:
H. Poddig;Th. Doert
The two-dimensionally incommensurately modulated crystal structures of the compounds RETe1.94(1) (RE = La, Pr, Nd) were investigated by single-crystal X-ray diffraction. The compounds crystallize in the tetragonal superspace group P4/n(αβ½)00(−βα½)00 (No. 85.2.58.2) with q1 = αa*+βb*+½c* and q2 = −βa*+αb*+½c* and share a common motif of an alternating stacking of a puckered [RETe] layer and a planar [Te] layer. This basic structural motif is observed for all reported compounds with unusually large anisotropic displacement parameters in the planar [Te] layer. Taking the modulation into account, a distortion from this perfect square planar net is noted along with vacancies in the planar [Te] layer. The distortion leads to the formation of different discrete anions, like Te2−, Te22− and Te32−, similar to previously reported structures for REX2–δ compounds (RE = trivalent rare earth metal, X = S, Se, Te). The Te–Te distances in the modulated [Te] layer are found in a narrow range as compared to those in the corresponding sulfides and selenides.
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DOI:
10.1002/zaac.201800382
发表时间:
2018
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
作者:
H. Poddig;T. Donath;P. Gebauer;K. Finzel;M. Kohout;P. Schmidt;Th. Doert
通讯作者:
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DOI:
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发表时间:
2003
期刊:
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2006
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DOI:
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2007
期刊:
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作者:
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通讯作者:
W. Carrillo‐Cabrera
DOI:
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发表时间:
2000
期刊:
影响因子:
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