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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2006     Display Documents



  history
ID: 273540.0, MPI für Festkörperforschung / FKF Publikationen 2006
Crystal structure and ionic conductivity of three polymorphic phases of rubidium trifluoromethyl sulfonate, RbSO3CF3
Authors:Hildebrandt, L.; Dinnebier, R. E.; Jansen, M.
Language:English
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Inorganic Chemistry
Volume:45
Issue / Number:8
Start Page:3217
End Page:3223
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The crystal structures of three polymorphic phases of rubidium
trifluoromethyl sulfonate (RbSO3CF3, rubidium 'triflate') were solved
from X-ray powder diffraction data. At room temperature, rubidium
triflate crystallizes in the monoclinic space group Cm with lattice
parameters of a = 19.9611(5) angstrom, b = 23.49113(7) angstrom, c =
5.1514(2) angstrom, beta = 102.758(2)degrees; Z = 16. At T = 321 K, a
first-order phase transition occurs toward a monoclinic phase in space
group P2(1) with lattice parameters at T = 344 K of a = 10,3434(5)
angstrom, b = 5.8283(3) angstrom, c = 5.1982(3) angstrom, beta =
104.278(6)degrees; Z = 2). At T = 461 K, another phase transition, this
time of second order, occurs toward an orthorhombic phase in space
group Cmcm with lattice parameters at T = 510 K of a = 5.3069(2)
angstrom, b = 20.2423(10) angstrom, c = 5.9479(2) angstrom; Z = 4. As a
common feature within all three crystal structures of rubidium
triflate, the triflate anions are arranged in double layers with the
lipophilic CF3 groups facing each other. The rubidium ions are located
between the SO3 groups. The general packing is similar to the packing
in cesium triflate. Rubidium triflate can be classified as a solid
electrolyte with a specific ionic conductivity of sigma = 9.89 x 10(-9)
S/cm at T = 384 K and sigma = 3.84 x 10(-6) S/cm at T = 481 K.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Festkörperforschung
External Affiliations:Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
Identifiers:ISI:000236961000015 [ID No:1]
ISSN:0020-1669 [ID No:2]
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