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Compressibility of CaMnO3: A study using a large-volume diffraction press

Published online by Cambridge University Press:  05 March 2012

Jarosław Piętosa ,
Wojciech Paszkowicz ,
Roman Minikayev ,
Jakub Nowak ,
Christian Lathe  and
Christine Martin
Jarosław Piętosa*
Affiliation:
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
Wojciech Paszkowicz
Affiliation:
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
Roman Minikayev
Affiliation:
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
Jakub Nowak
Affiliation:
Catholic University of Lublin, Department of Chemistry, al. Krasnicka 102, 20-718 Lublin, Poland
Christian Lathe
Affiliation:
Helmholtz Centre Potsdam, GFZ German Research Centre For Geosciences, Centre for CO2 Storage, 14473 Potsdam, Germany
Christine Martin
Affiliation:
CNRS, Laboratoire CRISMAT–ENSICAEN (UMR CNRS 6805), 6, bld Maréchal Juin, 14050 Caen Cedex 04, France
*
a)Author to whom correspondence should be addressed. Electronic mail: pietosa@ifpan.edu.pl
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Abstract

CaMnO3 is a parent compound for various manganite systems exhibiting useful physical properties. Therefore, its structural and elastic properties are of general interest. In this paper, P–V equation of state of stoichiometric CaMnO3 is determined using energy dispersive X-ray diffraction. The measurements were carried out at a synchrotron beamline F2.1 (Hasylab, DESY) with samples compressed in a cubic-anvil diffraction press, MAX80, for pressures ranging up to 4.84 GPa. The experimental bulk modulus of CaMnO3, derived from the variation in the unit-cell volume with pressure by fitting the Birch–Murnaghan equation of state, is 154.4(3.3) GPa. The results are discussed on the basis of experimental and theoretical data for CaMnO3 and related compounds.

Keywords

CaMnO3bulk modulusequation of stateperovskitehigh pressure

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Type
Technical Articles
Information
Powder Diffraction , Volume 26 , Issue 3 , September 2011 , pp. 262 - 266
Copyright
Copyright © Cambridge University Press 2011

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