The crystal structure of U2NiC3
Abstract
The crystal structure of U2NiC3 was determined from single-crystal X-ray data and refined to a residual of R = 0.029 for 530 structure factors and 34 variable parameters. It is of a new type with orthorhombic symmetry, space group Pnma, a = 6.4145(3) Å, b = 3.5457(2) Å, c = 13.2315(7) Å, V = 300.94 Å3, and Z = 4 formula units per cell. The two crystallographically different uranium atoms have large coordination polyhedra formed by all three constituating components. The nickel atoms have no near nickel neighbour. One third of the carbon atoms occupies octahedral voids formed by four uranium and two nickel atoms. The other two thirds form pairs (C – C-distance 1.43 Å). One of the carbon atoms of each pair has approximately octahedral coordination with five uranium and one carbon neighbour, the other carbon atom has trigonal prismatic uranium coordination with two nickel and one carbon atom as additional neighbours outside the rectangular faces of the prism. The hydrolysis of U2NiC3 in hydrochloric acid yields mainly methane and ethane as well as some ethylene, propene and propane.
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Articles in the same Issue
- Crystal structure refinement of K2HfF6
- High-temperature transformation of tridymite single crystals to cristobalite*
- Crystal structure of potassium pentafluorozirconate monohydrate, KZrF5 · H2O
- The similarities of the populous Cu2Sb and TlAsPd5 structures: Analysis of the building principles and formula of the TlAsPd5 structure
- Crystal structure of (η5-pentamethylcyclopentadienyl) (O,O′-diisopropyldithiophosphato) (dicarbonyl)-iron(II), FeS2PO4C18H29
- The crystal structure of U2NiC3
- The crystal structure of Zr3AlN
- Crystal structure of tris (glycine) calcium(II) dichloride
- Einführung in eine anorganische Strukturchemie
- The crystal structure refinement of a natural mordenite
- Characterization of lattice defects by means of a double crystal diffractometer
- Preparation and crystal structures of Ca(N3)2[OS(CH3)2]2 and Sr(N3)2[OS(CH3)2]2
- The crystal structures of Na2TiF6 and Na2SiF6
- The crystal structure of ethyl 5-methyl-l,2,3-triazino [5,4-b]-indole 4-carboxylate N(3)-oxide
- Die Kristallstruktur der orientierungsfehlgeordneten kubischen Hochtemperaturphase des Silberperchlorats AgClO4
- The shortest known interpolyhedral O – O distance in a silicate
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