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Triangular Exchange Interaction Patterns in K3Fe6F19: An Iron Potassium Fluoride with a Complex Tungsten Bronze Related Structure
- Source :
- Inorganic chemistry 52 (2013): 12599–12604. doi:10.1021/ic401749q, info:cnr-pdr/source/autori:Mezzadri, Francesco; Caestani, Gianluca; Righi, Lara; Pernechele, Chiara; Solzi, Massimo; Ritter, Clemens/titolo:Triangular Exchange Interaction Patterns in K3Fe6F19: An Iron Potassium Fluoride with a Complex Tungsten Bronze Related Structure/doi:10.1021%2Fic401749q/rivista:Inorganic chemistry/anno:2013/pagina_da:12599/pagina_a:12604/intervallo_pagine:12599–12604/volume:52
- Publication Year :
- 2013
- Publisher :
- American Chemical Society (ACS), 2013.
-
Abstract
- The synthesis and structural and magnetic characterizations of K3Fe6F19, a new iron potassium fluoride with a complex tungsten bronze related structure, are presented. This phase was found during the investigation of relatively low-temperature (600 degrees C) synthesis conditions of classical tetragonal tungsten bronze (TTB) fluorides and can be considered an intermediate that forms at this temperature owing to faster crystallization kinetics. The K3Fe6F19 compound has an orthorhombic structure (space group Cmcm (63), a = 7.6975(3) angstrom, b = 18.2843(7) angstrom, c = 22.0603(9) angstrom) related to the TTB one, where the perovskite cage is substituted by a large S-shaped channel simultaneously occupied by two potassium atoms. The magnetic structure, characterized by magnetization measurements on an oriented single crystal and powder neutron diffraction, is dominated by the presence of interconnected double stripes of antiferromagnetic triangular exchange interaction patterns alternately rotated in clock- and anticlockwise fashion. The magnetic order takes place in a wide temperature range, by increasing progressively the interaction dimensionality.
- Subjects :
- Magnetic structure
ANTIFERROMAGNET KFEF4
Chemistry
Neutron diffraction
chemistry.chemical_element
Tungsten
Potassium fluoride
Inorganic Chemistry
Magnetization
Crystallography
chemistry.chemical_compound
MOSSBAUER
PHASE-TRANSITION
CRYSTAL-STRUCTURE
Orthorhombic crystal system
Physical and Theoretical Chemistry
Single crystal
PYROCHLORE
Perovskite (structure)
Subjects
Details
- ISSN :
- 1520510X and 00201669
- Volume :
- 52
- Database :
- OpenAIRE
- Journal :
- Inorganic Chemistry
- Accession number :
- edsair.doi.dedup.....2b14e0e96ec3ae94ad03401c6908af43