Crystal structure of Rb2Fe5F17

Hyung-Ho Park, P. Gravereau, A. Tressaud, P. Hagenmuller

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Fine, whisker-like crystals of Rb2Fe5F17 have been obtained from solid state stoichiometric mixtures of RbF and FeF3. A structural model has been determined from single crystal diffractometer data in the Fmmm orthorhombic space group : a = 14.887(2) A ̊, b = 25.814(3) A ̊, c = 7.560(1) A ̊; z = 8; ρ{variant}exp. = 3.529 g cm-3; ρ{variant}calc.=3.535 g cm-3; λCo Ka=1.7903 A ̊; R = 0.068; Rω = 0.096 for 175 reflections with I σ(I) > 6. The structure has been compared with that of HTB. Rb2Fe5F17 exhibits layers of (Fe5F17)2n-n composition containing FeF6 corned-shared octahedra forming tunnels of hexagonal and triangular sections. Rubidium atoms are located between the layers and within the hexagonal tunnels with statistical occupancy. The structure has been roughly confirmed by TEM. The observed lowering in symmetry from Fmmm may be explained by partial ordering of rubidium and by possible bridging of (Fe5F17) sheets by FeF6 octahedra.

Original languageEnglish
Pages (from-to)321-330
Number of pages10
JournalMaterials Research Bulletin
Volume25
Issue number3
DOIs
Publication statusPublished - 1990 Jan 1

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Rubidium
rubidium
tunnels
Tunnels
Crystal structure
Crystal whiskers
crystal structure
Diffractometers
diffractometers
Single crystals
Transmission electron microscopy
solid state
Atoms
transmission electron microscopy
Crystals
single crystals
symmetry
Chemical analysis
atoms
4-trifluoromethylsalicylic acid

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Park, H-H., Gravereau, P., Tressaud, A., & Hagenmuller, P. (1990). Crystal structure of Rb2Fe5F17. Materials Research Bulletin, 25(3), 321-330. https://doi.org/10.1016/0025-5408(90)90103-9
Park, Hyung-Ho ; Gravereau, P. ; Tressaud, A. ; Hagenmuller, P. / Crystal structure of Rb2Fe5F17. In: Materials Research Bulletin. 1990 ; Vol. 25, No. 3. pp. 321-330.
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Park, H-H, Gravereau, P, Tressaud, A & Hagenmuller, P 1990, 'Crystal structure of Rb2Fe5F17', Materials Research Bulletin, vol. 25, no. 3, pp. 321-330. https://doi.org/10.1016/0025-5408(90)90103-9

Crystal structure of Rb2Fe5F17. / Park, Hyung-Ho; Gravereau, P.; Tressaud, A.; Hagenmuller, P.

In: Materials Research Bulletin, Vol. 25, No. 3, 01.01.1990, p. 321-330.

Research output: Contribution to journalArticle

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N2 - Fine, whisker-like crystals of Rb2Fe5F17 have been obtained from solid state stoichiometric mixtures of RbF and FeF3. A structural model has been determined from single crystal diffractometer data in the Fmmm orthorhombic space group : a = 14.887(2) A ̊, b = 25.814(3) A ̊, c = 7.560(1) A ̊; z = 8; ρ{variant}exp. = 3.529 g cm-3; ρ{variant}calc.=3.535 g cm-3; λCo Ka=1.7903 A ̊; R = 0.068; Rω = 0.096 for 175 reflections with I σ(I) > 6. The structure has been compared with that of HTB. Rb2Fe5F17 exhibits layers of (Fe5F17)2n-n composition containing FeF6 corned-shared octahedra forming tunnels of hexagonal and triangular sections. Rubidium atoms are located between the layers and within the hexagonal tunnels with statistical occupancy. The structure has been roughly confirmed by TEM. The observed lowering in symmetry from Fmmm may be explained by partial ordering of rubidium and by possible bridging of (Fe5F17) sheets by FeF6 octahedra.

AB - Fine, whisker-like crystals of Rb2Fe5F17 have been obtained from solid state stoichiometric mixtures of RbF and FeF3. A structural model has been determined from single crystal diffractometer data in the Fmmm orthorhombic space group : a = 14.887(2) A ̊, b = 25.814(3) A ̊, c = 7.560(1) A ̊; z = 8; ρ{variant}exp. = 3.529 g cm-3; ρ{variant}calc.=3.535 g cm-3; λCo Ka=1.7903 A ̊; R = 0.068; Rω = 0.096 for 175 reflections with I σ(I) > 6. The structure has been compared with that of HTB. Rb2Fe5F17 exhibits layers of (Fe5F17)2n-n composition containing FeF6 corned-shared octahedra forming tunnels of hexagonal and triangular sections. Rubidium atoms are located between the layers and within the hexagonal tunnels with statistical occupancy. The structure has been roughly confirmed by TEM. The observed lowering in symmetry from Fmmm may be explained by partial ordering of rubidium and by possible bridging of (Fe5F17) sheets by FeF6 octahedra.

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