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A single crystal X-ray and HRTEM study of new series of compounds DyCux (x=4.5, 4 and 3.5)

Wessicken, R.
Published in Journal of Solid State Chemistry. 2003, vol. 174, no. 1, p. 125-131
Abstract A series of monoclinic compounds DyCux (x = 4:5; 4 and 3.5) is described. It is constructed from structural blocks AB5 (cubic AuBe5 structure type) and AB2 (cubic MgCu2 structure type) by stacking nAB5 þ AB2 and giving the compositions A2B7;AB4;A4B17;A5B22;A6B27;…;AB5: The resulting monoclinic superstructures can be derived from the cubic AuBe5 type by introducing planar defects parallel to {hhh} that lead to a nearly orthogonal ≈(n + 2)x(n + 2)x(n + 2 - 0:5) supercells. The present series is analogous to the monoclinic–hexagonal–trigonal–orthorhombic series An+1B5n+2 obtained by the stacking (n-1)AB5 þ A2B7 where AB5 is of the hexagonal CaCu5 structure type and A2B7 is of the monoclinic Zr2Ni7 structure type.
Keywords Intermetallic compoundCrystal structureDyCuxX-ray diffractionHRTEM
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CERNY, Radovan, GUENEE, Laure, WESSICKEN, R. A single crystal X-ray and HRTEM study of new series of compounds DyCux (x=4.5, 4 and 3.5). In: Journal of Solid State Chemistry, 2003, vol. 174, n° 1, p. 125-131. doi: 10.1016/S0022-4596(03)00187-7 https://archive-ouverte.unige.ch/unige:35515

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Deposited on : 2014-04-08

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