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- W4317565922 abstract "Abstract The magnesium-rich intermetallic compounds Gd 5 Cu 5 Mg 13 and Tb 5 Cu 5 Mg 13 were obtained from direct reactions of the elements (induction melting) in sealed tantalum ampoules. Both compounds crystallize with the orthorhombic Y 5 Cu 5 Mg 13 type structure, space group Cmcm and Z = 4. The polycrystalline samples were characterized by powder X-ray diffraction. The structure of the gadolinium compound was refined from single crystal X-ray diffraction data: a = 414.78(2), b = 1921.87(12), c = 2573.89(16) pm, w R 2 = 0.0492, 1611 F 2 values and 77 variables. Refinement of the occupancy parameters revealed a small degree of Gd/Mg mixing for the Gd3 site, leading to the composition Gd 4.93(1) Cu 5 Mg 13.07(1) for the studied crystal. The Gd 5 Cu 5 Mg 13 structure contains slabs of equiatomic GdCuMg, which are embedded in a magnesium matrix. From a geometrical point of view, one can describe the Gd 5 Cu 5 Mg 13 and Tb 5 Cu 5 Mg 13 structures as intergrowth variants of distorted W/CsCl and AlB 2 related slabs. The most remarkable crystal chemical feature concerns the bcc like magnesium slabs with short Mg–Mg distances ranging from 300 to 342 pm. Temperature dependent magnetic susceptibility measurements show Curie-Weiss paramagnetism for Tb 5 Cu 5 Mg 13 (10.5(1) μ B Tb atom −1 and Θ P = −11.6(1) K). Antiferromagnetic ordering was detected below the Néel temperatures of T N = 30.5(3) K." @default.
- W4317565922 created "2023-01-21" @default.
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- W4317565922 date "2023-01-13" @default.
- W4317565922 modified "2023-10-18" @default.
- W4317565922 title "Magnesium-rich intermetallic compounds Gd<sub>5</sub>Cu<sub>5</sub>Mg<sub>13</sub> and Tb<sub>5</sub>Cu<sub>5</sub>Mg<sub>13</sub> – intergrowth variants with CsCl and AlB<sub>2</sub> related slabs" @default.
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- W4317565922 doi "https://doi.org/10.1515/zkri-2022-0064" @default.
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