The structure of Ce2Al3Ge4 refined for the first time from single-crystal X-ray diffraction data

Paul Tobash; Svilen Bobev

doi:10.1107/S2053229621000383

The structure of Ce₂Al₃Ge₄ refined for the first time from single-crystal X-ray diffraction data

Acta Crystallogr C Struct Chem. 2021 Feb 1;77(Pt 2):81-83. doi: 10.1107/S2053229621000383. Epub 2021 Jan 14.

Authors

Paul Tobash¹, Svilen Bobev¹

Affiliation

¹ Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.

PMID: 33536370
DOI: 10.1107/S2053229621000383

Abstract

Single crystals of dicerium trialuminium tetragermanide, Ce₂Al₃Ge₄, have been synthesized from a high-temperature reaction using an eutectic mixture of Al and Ge as a metal flux. Through single-crystal X-ray diffraction it was established that Ce₂Al₃Ge₄ crystallizes in the centrosymmetric space group Cmce (No. 64) with the Ba₂Cd₃Bi₄ structure type (Pearson code oC36). Five atoms compose the asymmetric unit, i.e. one Ce, two Al, and two Ge atoms, all in special positions with Wyckoff symbols 8f (Ce), 4a and 8e (Al), and 8e and 8f (Ge). The structure can be described as a three-dimensional network of Al and Ge atoms, with Ce atoms occupying the cavities of the framework.

Keywords: aluminium; cerium; crystal structure; germanide; lanthanide.

Abstract

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