Journal of the American Chemical Society · 2002 · 21 citations · 14 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsCrystal ChemistryCrystallographyStrongly Correlated Electron SystemsSuperconducting MaterialsX-ray CrystallographyX-ray DiffractionDisordered SuperconductivityFace-centered Cubic LatticeFace-centered Cubic PackingFace-centered Cubic StructureHydrogen Bonding InteractionsPowder DiffractionSuperconducting PropertiesSynchrotron X-ray Diffraction
The crystal structure of the superconducting (ND(3))(x)()NaA(2)C(60) (0.7 < or = x < or = 1, A= K, Rb) fullerides (T(c)= 6-15 K) has been studied by synchrotron X-ray and neutron powder diffraction. It is face-centered cubic (fcc) to low temperatures with Na(+)-ND(3) pairs residing in the octahedral interstices. These are disordered over the corners of two "interpenetrating" cubes with the Na(+) ions and the N atoms displaced by approximately 2.0 A and approximately 0.5 A from the center of the site and statically disordered over the corners of the inner and outer cube, respectively. Close contacts between the D atoms of the ND(3) molecules and electron rich 6:6 C-C bonds of neighboring C(60) units provide the signature of weak N-D.pi hydrogen-bonding interactions, which control the intermolecular packing in the crystal and may determine the unusual superconducting properties.
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Relation of structure and superconducting transition temperatures in A3C60
R. M. Fleming, A. P. Ramirez, Matthew J. Rosseinsky et al. · Nature · 1991 · 560 citations
Superconductivity in sodium-and lithium-containing alkali-metal fullerides
Katsumi Tanigaki, Ichiro Hirosawa, Thomas W. Ebbesen et al. · Nature · 1992 · 258 citations
High-Temperature Superconductivity in Lattice-Expanded C <sub>60</sub>
J. H. Schön, Ch. Kloc, B. Batlogg · Science · 2001 · 150 citations