Physical Review Letters · 2001 · 109 citations · 8 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsComposite MaterialsComposite Structure AnalysisHigh-pressure ThermodynamicsPhase EquilibriaPhase TransitionsHigh-pressure Phase BehaviorHigh-pressure Phase TransformationsHigh-pressure Phase TransitionsHost-guest CrystalsIncommensurate StructuresLattice ParametersPhase Transitions In Intercalation HostsTetragonal System
Rb-IV is found to have an incommensurate composite structure, comprising a tetragonal host framework and a simple body-centered tetragonal guest. This does not have the unexpectedly short Rb-Rb distances of the previously reported structure [U. Schwarz et al., Phys. Rev. Lett. 83, 4085 (1999)]. The ratio of the c-axis lattice parameters is strongly pressure dependent and approaches the commensurate value of 5/3 at the transition to phase V. A reversible broadening of the guest structure is observed below 16.5(2) GPa.
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Self-Hosting Incommensurate Structure of Barium IV
R. J. Nelmes, David R. Allan, M. I. McMahon et al. · Physical Review Letters · 1999 · 169 citations
Rubidium-IV: A High Pressure Phase with Complex Crystal Structure
Ulrich Schwarz, Andrzej Grzechnik, K. Syassen et al. · Physical Review Letters · 1999 · 100 citations