Pavel Karen

Image of Pavel Karen
Norwegian version of this page
Phone +47 22855590
Room ØU 82
Visiting address Sem Sælands vei 26 0371 Oslo
Postal address Postboks 1033 0315 Oslo

Academic interests

  • Inorganic chemistry and crystallography.
  • Metal oxides with fractional valences.
  • Less common combinations of properties: towards halfmetallic ferromagnet.
  • Relationship between structure and phase transitions into valence-controlled states: temperatures of valence mixing, of superconductivity.
  • Less common compositions: carbides-oxides as pseudonitrides, nitrides-fluorides as pseudooxides.
  • Oxide materials with less-common properties: high conductivity, photocatalysis.

Academic interests, methods

  • Syntheses of new compounds at less-common temperature- and redox conditions.
  • Precise valence control in solid oxides of transition metals.
  • Structure determination from synchrotron x-ray and neutron diffraction data.
  • Mössbauer spectroscopy of valence-, spin-, and coordination states (in collaboration).
  • Magnetic, electric and thermal properties of inorganic solids (in collaboration).



  • Positions related to University of Oslo: Professor, lecturer, researcher.
  • Earlier positions: lecturer, University of Chemical Technology, Prague.


  • Textbook of the year, 1987 (University of Chemical Technology, Prague)
  • First place in national Chemistry Olympiad in Prague, 1966

Scientific service

  • IUPAC, associated member in Division II, Inorganic Chemistry
  • IUPAC, member of the Interdivisional Committee on Terminology, Nomenclature and Symbols
  • International Centre for Diffraction Data, a member
  • Norwegian Chemical Society, member of nomenclature committee


An extensive collaboration in Finland and USA


IUPAC project Toward a Comprehensive Definition of Oxidation State

IUPAC project Toward a Comprehensive Definition of Valence

Tags: Inorganic chemistry, Crystallography, Mixed valence


View all works in Cristin

  • Karen, Pavel & Benneche, Tore (2004). KJM1010 Kjemiske strukturer og prinsipper - Laboratoriekurs. Universitetet i Oslo, Reprosentralen.  81 s.
  • Karen, Pavel & Furuseth, Sigrid Breien (2004). KJM1010 Kjemiske strukturer og prinsipper - Tilleggskompendium: Konsepter i uorganisk reaksjonskjemi. Universitetet i Oslo, Reprosentralen.  24 s.

View all works in Cristin

  • Karen, Pavel (2017). KJM 1120 Uorganisk kjemi, Laboratoriekurs høstsemester 2017.
  • Karen, Pavel (2008). KJM 1120 Uorganisk kjemi Laboratoriekurs hoestsemester 2008.
  • Karen, Pavel (2008). Most pressurized elements aren't simple cubic. Physics today.  ISSN 0031-9228.  61, s 10- 10
  • Karen, Pavel (2008). Valence mixing and ordering in RBaFe2O5+w.
  • Karen, Pavel (2007). KJM1030 Uorganisk kjemi Laboratoriekurs, vårsemester 2007.
  • Karen, Pavel (2007). Valence-mixed compounds (Fe3O4 and RBaFe2O5).
  • Karen, Pavel (2006). KJM1030 Uorganisk kjemi, Laboratoriekurs, vårsemester 2006.
  • Karen, Pavel (2006). KJM1021 Kjemisk Struktur og Reaktivitet, Laboratoriekurs uorganisk del høstsemesteret 2006.
  • Karen, Pavel (2005). Nonstoichiometry in oxides and its control.
  • Karen, Pavel (2005). Verwey transition in a perovskite-type structure. Show summary
  • Karen, Pavel (2005). What is Verwey transition and why it may matter.
  • Karen, Pavel (2004). Tuning the Verwey transition as an orbital ordering, ILL Annual Report 2003, p.24-5.
  • Karen, Pavel (2004). What RBaFe2O5+w tells us about Verwey transition and why it matters.
  • Karen, Pavel (2002). Charge ordering that only succeeds after nature's second attempt.
  • Karen, Pavel (2002). KJ 102 Uorganisk kjemi, Laboratoriekurs, høstsemester 2002.
  • Karen, Pavel; Woodward, Patrick M. & Lindén, Johan (2002). Charge ordering that only succeeds after nature's second attempt.
  • Karen, Pavel (2001). KJ110 Uorganisk kjemi I; Laboratoriekurs, høstsemester 2001.
  • Karen, Pavel (2000). KJ 110 Uorganisk kjemi I; Laboratoriekurs, høstsemester 2000.
  • Karen, Pavel & Kjekshus, Arne (2000). Phase Diagrams and Thermodynamic Properties, In Karl A. Jr. Gschneidner; LeRoy Eyring & Brian M. Maple (ed.),  Handbook on the Physics and Chemistry of the Rare Earths. Volume 30, High-Temperature Superconductors - I.  Elsevier Science B.V., The Netherlands.  ISBN 0-444-50528-8.  Chapter 190.  s 229 - 373 Show summary
  • Lindén, Johan; Nakamura, Jin; Karen, Pavel; Kjekshus, Arne; Karppinen, Maarit & Yamauchi, Hisao (2000). Observation of mixed-valence state in the BaSm(Cu1-xFex) phase.
  • Karen, Pavel (1999). Ordering, Mixed-Valence and Metallic Character Along the Redox Range in LnBaM2O5+w (M = Fe and Co). Show summary

View all works in Cristin

Published Nov. 11, 2010 9:00 AM - Last modified Jan. 27, 2020 9:38 AM