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Monoclinic 122-Type BaIr2Ge2 with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds

Author(s): Gui, Xin; Chang, Tay-Rong; Kong, Tai; Pan, Max T.; Cava, Robert Joseph; et al

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Abstract: © 2017 by the authors. A new 122-type phase, monoclinic BaIr2Ge2 is successfully synthesized by arc melting; X-ray diffraction and scanning electron microscopy are used to purify the phase and determine its crystal structure. BaIr2Ge2 adopts a clathrate-like channel framework structure of the monoclinic BaRh2Si2-type, with space group P21/c. Structural comparisons of clathrate, ThCr2Si2, CaBe2Ge2, and BaRh2Si2 structure types indicate that BaIr2Ge2 can be considered as an intermediate between clathrate and layered compounds. Magnetic measurements show it to be diamagnetic and non-superconducting down to 1.8 K. Different from many layered or clathrate compounds, monoclinic BaIr2Ge2 displays a metallic resistivity. Electronic structure calculations performed for BaIr2Ge2 support its observed structural stability and physical properties.
Publication Date: 18-Jul-2017
Citation: Gui, X., Chang, T.R., Kong, T., Pan, M.T., Cava, R.J., Xie, W. (2017). Monoclinic 122-Type BaIr<inf>2</inf>Ge<inf>2</inf> with a channel framework: A structural connection between clathrate and layered compounds. Materials, 10 (7), 10.3390/ma10070818
DOI: doi:10.3390/ma10070818
EISSN: 1996-1944
Pages: 10.7:818-1 - 818-10
Type of Material: Journal Article
Journal/Proceeding Title: Materials
Version: Final published version. This is an open access article.
Notes: Materials. Volume 10, Issue 7, 18 July 2017, Article number 818.

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