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Abstract Crystal structures of two novel scandium-rich ternary compounds forming in the Sc-Co-In system, obtained by arc-melting of pure metals, were determined using X-ray powder diffraction. The structure of Sc… Click to show full abstract
Abstract Crystal structures of two novel scandium-rich ternary compounds forming in the Sc-Co-In system, obtained by arc-melting of pure metals, were determined using X-ray powder diffraction. The structure of Sc 2 CoIn (space group P 4/ mmm , а = 3.2887(2), ≿ = 7.1642(4) A, Z = 1, R I = 5.97%) can be derived from the CsCl-type structure. In turn, the structure of Sc 100 Co 25 In 7 (space group Fm- 3, а = 17.7411(5) A, Z = 2, R I = 8.08%) is related to the structures of Sc 50 T 13 In 3 ( T = Rh, Ir) and ɛ -Ag 7+x Mg 26-x (x = 0.96). The magnetic properties of both phases were studied at low temperatures down to 1.7 K. The indide Sc 2 CoIn was found to order antiferromagnetically at 65 K due to the magnetic moments carried on Co atoms. In contrast, Sc 100 Co 25 In 7 was characterized as a weak Pauli paramagnet.
Journal Title: Journal of Alloys and Compounds
Year Published: 2018
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