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- W2019625248 abstract "The gold-rich intermetallic compound SrAu 4.76 In 1.24 was synthesized by high-frequence-melting of the elements in a sealed tantalum tube and subsequent annealing. The structure was refined from single-crystal X-ray diffraction data: YbMo 2 Al 4 -type, I4/mmm, Z = 2, a = 718.77(7), c = 552.79(9) pm, wR2 = 0.0760, 149 F 2 values and 11 parameters. The 4d (0.62 In + 0.38 Au) Wyckoff position shows mixed occupancy leading to the composition SrAu 4.76 In 1.24 for the investigated crystal. The strontium atoms are located in a large cage built up by 12 Au + 8 In atoms. The gold and indium atoms show segregation into substructures. The striking structural motifs are Au 4 squares (278 pm Au-Au) and indium chains (276 pm In-In). The squares and chains are connected via weaker Au-Au (299 pm) and Au-In (295 pm) bonds to a three-dimensional network. The In chains show the motif of rod packing. Electronic structure calculations show anisotropy within the structure with different responses to compressions along In-In chains and Au planes, also illustrated by the electron localization contour plots. The metallic behavior is found to be of itinerant electron type (like Cu), and the chemical bonding includes stabilizing Au-In interactions." @default.
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- W2019625248 date "2011-10-01" @default.
- W2019625248 modified "2023-10-18" @default.
- W2019625248 title "SrAu4.76In1.24 with YbMo2Al4-type Structure" @default.
- W2019625248 doi "https://doi.org/10.1515/znb-2011-1003" @default.
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