Ce13Ir34.4P24 – An intergrowth structure of ThCr2Si2, SrPtSb, and CeMg2Si2 related slabs
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Ulrike Pfannenschmidt
Abstract
Well-shaped needles of the metal-rich phosphide Ce13Ir34.4P24 were synthesized by a reaction of the elements in a lead flux (1 : 2 : 2 : 60 molar ratio, 1370 K, slow cooling rate of 2 K/h). Ce13Ir34.4P24 was characterized by X-ray powder and single crystal data: new structure type C2/m (mS144–1.2), a = 4512.2(9), b = 398.51(8), c = 1331.1(2) pm, β = 105.01(2)°, wR2 = 0.0326, 3554 F2 values and 186 variables. The structure is built up from a complex three-dimensional [Ir34.4P24]δ– polyanion in which the seven crystallographically independent cerium atoms fill distorted hexagonal cavities. Geometrically the Ce13Ir34.4P24 structure can be described as an intergrowth variant of ThCr2Si2, SrPtSb, and CeMg2Si2 related slabs, similar to Lu3Ir7P5, Sm15Ir33P26, and Ce4Ir14P9.
© by Oldenbourg Wissenschaftsverlag, Münster, Germany
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Articles in the same Issue
- New polyhedra – Part 3
- Dimorphic Nd2Cu2Cd – structures and magnetic properties of RE2Cu2Cd (RE = Ce, Pr, Nd)
- Structure and properties of the 5.5 K antiferromagnet EuAu2Ge2
- REEAl2.07(B4O10)O0.60 dimetaborates (REE = La, Pr); synthesis and X-ray structural characterization
- In situ X-ray diffraction investigations of a multiphase inclusion in a diamond from the Juina district, Brazil
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- High temperature elastic properties of Mg-cordierite: experimental studies and atomistic simulations
- Electron crystallography of MWW zeolites – filling the missing cone
- Martensitic phase transition in pure zirconia: a crystal chemistry viewpoint
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