The crystal structure of the ternary alloy c-Al68Pd20Ru12
Abstract
The crystal structure of cubic Al68Pd20Ru12 was investigated by means of single crystal X-ray structure analysis: space group P23 (No. 195), a = 15.540(2) Å, V = 3753(1) Å3, Pearson symbol cP296–46.85. The chemical composition was determined by microprobe analysis: Al68Pd20Ru12, Mr = 6316, Z = 2, Dcalc = 5.59 Mg m−3; MoKα, refined as Al87Pd38, F(000) = 5758, μ = 9.89 mm−1, R(wR) = 0.056(0.052) for 1289 reflections with F > 3σ(F) and 133 variables, goodness of fit S = 2.21. The structure contains 35 different orbits. Body centred pseudo symmetry is broken by the distribution of atoms, the non-centrosymmetric point symmetry 23 of this structure is close to m[unk] in space group Pn[unk]. Disorder of Al atoms is observed at a number of positions. Interatomic distances cover the ranges of 2.98 Å to 3.20 Å, 2.43 Å to 3.12 Å and 2.54 Å to 3.66 Å, for contacts TM–TM, Al–TM and Al–Al, respectively (TM: transition metal). The coordination shells contain triangular and/or quadrangular faces forming icosahedra, rhombic dodecahedra or respective combinations of these two basic forms. Links to cubic approximants of icosahedral phases are shown and relationships to neighboring crystalline and decagonal phases are discussed.
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Articles in the same Issue
- Two 3-periodic self-intersecting minimal surfaces related to the Cr3Si structure type
- Die Kristallstrukturen der Verbindungen La2Ge3O9 und Ce2Ge3O9 und ihre strukturelle Verwandtschaft zum Törnebohmit-Typ RE2Al(SiO4)2(OH)
- Neutron powder diffraction on monoclinic Li2CrCl4
- Rietveld structure refinement of synthetic magnesium substituted β-tricalcium phosphate
- The crystal structure of the ternary alloy c-Al68Pd20Ru12
- Short Cr3+ –Cr3+ distances in magnetoplumbite type SrCr9Ga3O19
- Crystal structure analysis of some mesogenic cyanoazines
- The structure of ergot alkaloid hydroxyergotamine
- Crystal and molecular structure of sodium dodecyl(oxyethylene)sulfate hydrate
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- Crystal structure of dimethylammonium tribromostannate(II), (CH3)2NH2SnBr3
- Crystal structure of dimethylammonium triiodostannate(II), (CH3)2NH2SnI3
- Crystal structure of thallium triindium pentasulfide, TlIn3S5
- Crystal structure of thallium pentaindium octasulfide, TlIn5S8
- Crystal structures of thallium pentaindium heptasulfide, TlIn5S7 and thallium pentaindium heptaselenide, TlIn5Se7
- Crystal structure of hexabarium di-μ-phosphido-bis(diphosphidogallate(III)), Ba6[Ga2P6]
- Crystal structure of lithium tetrastrontium tris(dinitridoborate), LiSr4(BN2)3
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- Crystal structure of 1,3-diethyl-4,5dimethyl-imidazolium disulfate, (C2H5)4(CH3)4(C3N2H)2(S2O7)
- Crystal structure of [η2-bis(trimethylsilyl)acetylene][η2-bis(di-tert-butylphosphino)methane]nickel(0), ((CH3)3Si)2C2((C4H9)2P)2CH2Ni
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