Neutron diffraction determination of the cell dimensions and thermal expansion of the fluoroperovskite KMgF3 from 293 to 3.6 K

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DOIResolve DOI: http://doi.org/10.1007/s00269-006-0106-x
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TypeArticle
Journal titlePhysics and Chemistry of Minerals
Volume33
Issue8
Pages587591; # of pages: 5
AbstractThe cell dimensions of the fluoroperovskite KMgF3 synthesized by solid state methods have been determined by powder neutron diffraction and Rietveld refinement over the temperature range 293–3.6 K using Pt metal as an internal standard for calibration of the neutron wavelength. These data demonstrate conclusively that cubic $$ Pm\overline{3} m $$ KMgF3 does not undergo any phase transitions to structures of lower symmetry with decreasing temperature. Cell dimensions range from 3.9924(2) at 293 K to 3.9800(2) at 3.6 K, and are essentially constant within experimental error from 50 to 3.6 K. The thermal expansion data are described using a fourth order polynomial function.
Publication date
AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
NPARC number12337925
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Record identifierb364cb88-d0ad-444b-9bfd-ef71401f474d
Record created2009-09-10
Record modified2016-05-09
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