Dr Jens Najorka

  • X Ray Lab Manager
  • Science Facilities department
  • Imaging and Analysis Centre
Natural History Museum
Cromwell Road
London
SW7 5BD

Biography

Employment history

2008 - present  Manager X-ray Diffraction Laboratory, Natural History Museum, London.

2001 - 2008      Researcher, Tata Steel RD&T, Ceramics Research Centre IJmuiden, 
                        Netherlands; Microstructure, Crystallography and Thermal Analysis Group.

2001                 Post-doctoral Fellowship,  Department of Earth Sciences, University of Bristol.

1996 - 2000       Research Assistant, GeoForschungsZentrum Potsdam, Germany.

Qualifications

2000                 PhD, Experimental Mineralogy, GeoForschungsZentrum Potsdam, 
                             Technical University, Berlin, Germany.

1990 -1996        Graduate in Mineralogy, Technical University Berlin, Freiberg Mining Academy,                              Germany.

Responsibilities

  • Manage day-to-day running of the X-ray laboratories
  • Develop X-ray techniques to meet research needs
  • Train and supervise users and visitors
  • Research and income generating activities

Research

Interests

Analytical mineralogy - X-ray diffraction and thermal analysis. Physics and chemistry of minerals. Thermochemical and kinetic modeling.

Publications

Selected publications

2011
  • Ferrat M, Weiss DJ, Strekopytov S, Dong S, Chen H, Najorka J, Sun Y, Gupta S, Tada R, Sinha R ( 2011 ) Improved provenance tracing of Asian dust sources using rare earth elements and selected trace elements for palaeomonsoon studies on the eastern Tibetan Plateau Geochimica et Cosmochimica Acta 75 : 6374-6399 . 10.1016/j.gca.2011.08.025
2010
  • Humphreys E R, Bailey K, Hawkesworth C J, Wall F, Najorka J, Rankin A H ( 2010 ) Aragonite in olivine from Calatrava, Spain-Evidence for mantle carbonatite melts from >100 km depth Geology 38 : 911-914 . 10.1130/G31199.1
2004
  • Andrut M, Harlov D E, Najorka J ( 2004 ) Characterization of ammonioleucite (NH4)[AlSi2O6] and ND4-ammonioleucite (ND4)[AlSi2O6] using IR spectroscopy and Rietveld refinement of XRD spectra. Mineralogical Magazine 68, 1 : 177-189 . 10.1180/0026461046810179
2003
  • Najorka J and Gottschalk M ( 2003 ) Crystal chemistry of tremolite-tschermakite solid solutions Physics and Chemistry of Minerals 30, 2 : 108-124 . 10.1007/s00269-002-0291-1
2002
  • McDade P, Wood B J, Van Westrenen W, Brooker R, Gudmundsson G, Soulard H, Najorka J, Blundy J ( 2002 ) Pressure corrections for a selection of piston-cylinder cell assemblies Mineralogical Magazine 66, 1 : 1021-1028 . 10.1180/0026461026660074
  • Najorka J, Gottschalk M, Heinrich W ( 2002 ) Composition of synthetic tremolite-tschermakite solid solutions in amphibole-anorthite and amphibole-zoisite bearing assemblages American Mineralogist 87 : 467-477 .
1999
  • Andrut M, Gottschalk M, Melzer S, Najorka J ( 1999 ) Lattice vibrations in synthetic tremolite-Sr-tremolite and tremolite-richterite solid solutions Physics and Chemistry of Minerals 27, 5 : 301-309 . 10.1007/s002690050259
  • Najorka J, Gottschalk M, Franz G, Heinrich W ( 1999 ) Experimental determination of the Sr-Ca distribution between amphibole, clinopyroxene and chloridic aqueous solution American Mineralogist 84 : 596-606 .
1998
  • Gottschalk M, Najorka J, Andrut M ( 1998 ) Structural and compositional characterization of synthetic (Ca,Sr)-tremolite and (Ca,Sr) diopside solid solutions by EMP, HRTEM, XRD and OH-valence spectroscopy Physics and Chemistry of Minerals 25, 6 : 415-428 . 10.1007/s002690050131