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The structure of Ce 2 Al 3 Ge 4 refined for the first time from single‐crystal X‐ray diffraction data
Author(s) -
Tobash Paul,
Bobev Svilen
Publication year - 2021
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229621000383
Subject(s) - crystallography , crystal structure , diffraction , x ray crystallography , germanium , single crystal , eutectic system , materials science , structure type , chemistry , physics , silicon , metallurgy , optics , microstructure
Single crystals of dicerium trialuminium tetragermanide, Ce 2 Al 3 Ge 4 , 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 Ce 2 Al 3 Ge 4 crystallizes in the centrosymmetric space group Cmce (No. 64) with the Ba 2 Cd 3 Bi 4 structure type (Pearson code oC 36). Five atoms compose the asymmetric unit, i.e. one Ce, two Al, and two Ge atoms, all in special positions with Wyckoff symbols 8 f (Ce), 4 a and 8 e (Al), and 8 e and 8 f (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.