Dr Jens Najorka

Dr Jens Najorka

X Ray Lab Manager

Department: Core Research Laboratories
Division: Imaging and Analysis Centre

Qualifications

Degrees

PhD Mineralogy (Experimental Petrology), Technical University of Berlin, GFZ German Research Centre for Geosciences, Potsdam, Germany, 1996 - 2000

Diploma Mineralogy, Technical University of Berlin, Freiberg Mining Academy, Germany

Employment history

Academic

X-ray Laboratory Manager, Natural History Museum, United Kingdom, 2008 - ongoing

Postdoctoral Fellow, Department of Earth Sciences, University of Bristol, United Kingdom, 2001 - 2001

Non-academic

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

Publications

Iglikowska A, Najorka J, Voronkov A, Chełchowski M, Kukliński P (2017) Variability in magnesium content in Arctic echinoderm skeletons. Marine Environmental Research, 129 : 207 - 218. doi: 10.1016/j.marenvres.2017.06.002

Piwoni-piórewicz A, Kukliński P, Strekopytov S, Humphreys-williams E, Najorka J, Iglikowska A (2017) Size effect on the mineralogy and chemistry of Mytilus trossulus shells from the southern Baltic Sea: implications for environmental monitoring. Environmental Monitoring and Assessment, 189 (4) : doi: 10.1007/s10661-017-5901-y

Wrona T, Taylor KG, Jackson CA-L, Huuse M, Najorka J, Pan I (2017) Impact of silica diagenesis on the porosity of fine-grained strata: An analysis of Cenozoic mudstones from the North Sea. Geochemistry, Geophysics, Geosystems, 18 (4) : 1537 - 1549. doi: 10.1002/2016GC006482

Wadsworth FB, Heap MJ, Damby DE, Hess K-U, Najorka J, Vasseur J, Fahrner D, Dingwell DB (2017) Local geology controlled the feasibility of vitrifying Iron Age buildings. Scientific Reports, 7 : 40028 - 40028. doi: 10.1038/srep40028

Mitchell RL, Cuadros J, Duckett JG, Pressel S, Mavris C, Sykes D, Najorka J, Edgecombe GD, Kenrick P (2016) Mineral weathering and soil development in the earliest land plant ecosystems. Geology, 44 (12) : 1007 - 1010. doi: 10.1130/G38449.1

Krzeminska M, Kuklinski P, Najorka J, Iglikowska A (2016) Skeletal Mineralogy Patterns of Antarctic Bryozoa. The Journal of Geology, 124 (3) : 411 - 422. doi: 10.1086/685507

Najorka J, Lewis JMT, Spratt J, Sephton MA (2016) Single-crystal X-ray diffraction study of synthetic sodium–hydronium jarosite. Physics and Chemistry of Minerals, 43 (5) : 377 - 386. doi: 10.1007/s00269-016-0802-0

Wadsworth FB, Damby DE, Hearne RL, Le BlondJS, Vasseur J, Najorka J, Hess K-U, Dingwell DB (2015) The feasibility of vitrifying a sandstone enclosure in the British Iron Age. Journal of Archaeological Science: Reports, 4 : 605 - 612. doi: 10.1016/j.jasrep.2015.06.007

Rumsey MS, Dossett I, Green DI, Najorka J, Spratt J (2015) Crookesite, Cu7TlSe4, from Littleham Cove, Devon: the first mineral containing essential thallium from the British Isles.. Journal of the Russell Society, 18 : 48 - 52.

Vaccaro E, King AJ, Najorka J, Starkey NA, Franchi IA, Russell SS (2015) IN-SITU MICRO-XRD COMPARATIVE STUDY OF MIL 07687 AND ALHA77307 MATRIX.. METEORITICS & PLANETARY SCIENCE 50 :

Green G, Higginson R, Hogg S, Spindler S, Hamm C, Najorka J (2015) Analysis of ferrite formed in 321 grade austenitic stainless steel. Materials Science and Technology, 31 (4) : 418 - 425. doi: 10.1179/1743284714Y.0000000564

Lewis JMT, Watson JS, Najorka J, Luong D, Sephton MA (2015) Sulfate Minerals: A Problem for the Detection of Organic Compounds on Mars?. Astrobiology, 15 (3) : 247 - 258. doi: 10.1089/ast.2014.1160

Williamson CJ, Najorka J, Perkins R, Yallop ML, Brodie J (2014) Skeletal mineralogy of geniculate corallines: providing context for climate change and ocean acidification research. Marine Ecology Progress Series, 513 : 71 - 84. doi: 10.3354/meps10929

Loxton J, Kuklinski P, Najorka J, Spencer JonesM, Porter JS (2014) Variability in the skeletal mineralogy of temperate bryozoans: the relative influence of environmental and biological factors. Marine Ecology Progress Series, 510 : 45 - 57. doi: 10.3354/meps10889

Damby DE, Llewellin EW, Horwell CJ, Williamson BJ, Najorka J, Cressey G, Carpenter M (2014) The α–β phase transition in volcanic cristobalite. Journal of Applied Crystallography, 47 (4) : 1205 - 1215. doi: 10.1107/S160057671401070X

Loxton J, Kuklinski P, Barnes DKA, Najorka J, Spencer JonesM, Porter JS (2014) Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. Marine Ecology Progress Series, 507 : 169 - 180. doi: 10.3354/meps10826

Velis CA, Franco-salinas C, O’sullivan C, Najorka J, Boccaccini AR, Cheeseman CR (2014) Up-Cycling Waste Glass to Minimal Water Adsorption/Absorption Lightweight Aggregate by Rapid Low Temperature Sintering: Optimization by Dual Process-Mixture Response Surface Methodology. Environmental Science & Technology, 48 (13) : 7527 - 7535. doi: 10.1021/es5003499

Purvis OW, Convey P, Flowerdew MJ, Peat HJ, Najorka J, Kearsley A (2013) Iron localization in Acarospora colonizing schist on Signy Island. Antarctic Science, 25 (01) : 24 - 30. doi: 10.1017/S0954102012000582

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 (21) : 6374 - 6399. doi: 10.1016/j.gca.2011.08.025

Humphreys ER, Bailey K, Hawkesworth CJ, Wall F, Najorka J, Rankin AH (2010) Aragonite in olivine from Calatrava, Spain--Evidence for mantle carbonatite melts from >100 km depth. Geology, 38 (10) : 911 - 914. doi: 10.1130/G31199.1

Andrut M, Harlov DE, 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. doi: 10.1180/0026461046810179

Najorka J, Gottschalk M (2003) Crystal chemistry of tremolite-tschermakite solid solutions. Physics and Chemistry of Minerals, 30 (2) : 108 - 124. doi: 10.1007/s00269-002-0291-1

Mcdade P, Wood BJ, Van WestrenenW, Brooker R, Gudmundsson G, Soulard H, Najorka J, Blundy J (2002) Pressure corrections for a selection of piston-cylinder cell assemblies. Mineralogical Magazine, 66 (6) : 1021 - 1028. doi: 10.1180/0026461026660074

Najorka J, Gottschalk M, Heinrich W (2002) Composition of synthetic tremolite-tschermakite solid solutions in amphibole + anothite- and amphibole + zoisite-bearing assemblages. American Mineralogist: an international journal of earth and planetary materials, 87 : 462 - 477.

Andrut M, Gottschalk M, Melzer S, Najorka J (2000) Lattice vibrational modes in synthetic tremolite-Sr-tremolite and tremolite-richterite solid solutions. Physics and Chemistry of Minerals, 27 (5) : 301 - 309. doi: 10.1007/s002690050259

Najorka J, Gottschalk M, Franz G, Heinrich W (1999) Ca-Sr distribution among amphibole, clinopyroxene and chloride-bearing solution. American Mineralogist: an international journal of earth and planetary materials, 84 : 596 - 606.

Gottschalk M, Najorka J, Andrut M (1998) Structural and compositional characterization of synthetic (Ca,Sr)-tremolite and (Ca,Sr)-diopside solid solutions. Physics and Chemistry of Minerals, 25 (6) : 415 - 428. doi: 10.1007/s002690050131

Introduction

Qualifications

Degrees

PhD Mineralogy (Experimental Petrology), Technical University of Berlin, GFZ German Research Centre for Geosciences, Potsdam, Germany, 1996 - 2000

Diploma Mineralogy, Technical University of Berlin, Freiberg Mining Academy, Germany

Employment history

Academic

X-ray Laboratory Manager, Natural History Museum, United Kingdom, 2008 - ongoing

Postdoctoral Fellow, Department of Earth Sciences, University of Bristol, United Kingdom, 2001 - 2001

Non-academic

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

Publications

Publications

Iglikowska A, Najorka J, Voronkov A, Chełchowski M, Kukliński P (2017) Variability in magnesium content in Arctic echinoderm skeletons. Marine Environmental Research, 129 : 207 - 218. doi: 10.1016/j.marenvres.2017.06.002

Piwoni-piórewicz A, Kukliński P, Strekopytov S, Humphreys-williams E, Najorka J, Iglikowska A (2017) Size effect on the mineralogy and chemistry of Mytilus trossulus shells from the southern Baltic Sea: implications for environmental monitoring. Environmental Monitoring and Assessment, 189 (4) : doi: 10.1007/s10661-017-5901-y

Wrona T, Taylor KG, Jackson CA-L, Huuse M, Najorka J, Pan I (2017) Impact of silica diagenesis on the porosity of fine-grained strata: An analysis of Cenozoic mudstones from the North Sea. Geochemistry, Geophysics, Geosystems, 18 (4) : 1537 - 1549. doi: 10.1002/2016GC006482

Wadsworth FB, Heap MJ, Damby DE, Hess K-U, Najorka J, Vasseur J, Fahrner D, Dingwell DB (2017) Local geology controlled the feasibility of vitrifying Iron Age buildings. Scientific Reports, 7 : 40028 - 40028. doi: 10.1038/srep40028

Mitchell RL, Cuadros J, Duckett JG, Pressel S, Mavris C, Sykes D, Najorka J, Edgecombe GD, Kenrick P (2016) Mineral weathering and soil development in the earliest land plant ecosystems. Geology, 44 (12) : 1007 - 1010. doi: 10.1130/G38449.1

Krzeminska M, Kuklinski P, Najorka J, Iglikowska A (2016) Skeletal Mineralogy Patterns of Antarctic Bryozoa. The Journal of Geology, 124 (3) : 411 - 422. doi: 10.1086/685507

Najorka J, Lewis JMT, Spratt J, Sephton MA (2016) Single-crystal X-ray diffraction study of synthetic sodium–hydronium jarosite. Physics and Chemistry of Minerals, 43 (5) : 377 - 386. doi: 10.1007/s00269-016-0802-0

Wadsworth FB, Damby DE, Hearne RL, Le BlondJS, Vasseur J, Najorka J, Hess K-U, Dingwell DB (2015) The feasibility of vitrifying a sandstone enclosure in the British Iron Age. Journal of Archaeological Science: Reports, 4 : 605 - 612. doi: 10.1016/j.jasrep.2015.06.007

Rumsey MS, Dossett I, Green DI, Najorka J, Spratt J (2015) Crookesite, Cu7TlSe4, from Littleham Cove, Devon: the first mineral containing essential thallium from the British Isles.. Journal of the Russell Society, 18 : 48 - 52.

Vaccaro E, King AJ, Najorka J, Starkey NA, Franchi IA, Russell SS (2015) IN-SITU MICRO-XRD COMPARATIVE STUDY OF MIL 07687 AND ALHA77307 MATRIX.. METEORITICS & PLANETARY SCIENCE 50 :

Green G, Higginson R, Hogg S, Spindler S, Hamm C, Najorka J (2015) Analysis of ferrite formed in 321 grade austenitic stainless steel. Materials Science and Technology, 31 (4) : 418 - 425. doi: 10.1179/1743284714Y.0000000564

Lewis JMT, Watson JS, Najorka J, Luong D, Sephton MA (2015) Sulfate Minerals: A Problem for the Detection of Organic Compounds on Mars?. Astrobiology, 15 (3) : 247 - 258. doi: 10.1089/ast.2014.1160

Williamson CJ, Najorka J, Perkins R, Yallop ML, Brodie J (2014) Skeletal mineralogy of geniculate corallines: providing context for climate change and ocean acidification research. Marine Ecology Progress Series, 513 : 71 - 84. doi: 10.3354/meps10929

Loxton J, Kuklinski P, Najorka J, Spencer JonesM, Porter JS (2014) Variability in the skeletal mineralogy of temperate bryozoans: the relative influence of environmental and biological factors. Marine Ecology Progress Series, 510 : 45 - 57. doi: 10.3354/meps10889

Damby DE, Llewellin EW, Horwell CJ, Williamson BJ, Najorka J, Cressey G, Carpenter M (2014) The α–β phase transition in volcanic cristobalite. Journal of Applied Crystallography, 47 (4) : 1205 - 1215. doi: 10.1107/S160057671401070X

Loxton J, Kuklinski P, Barnes DKA, Najorka J, Spencer JonesM, Porter JS (2014) Variability of Mg-calcite in Antarctic bryozoan skeletons across spatial scales. Marine Ecology Progress Series, 507 : 169 - 180. doi: 10.3354/meps10826

Velis CA, Franco-salinas C, O’sullivan C, Najorka J, Boccaccini AR, Cheeseman CR (2014) Up-Cycling Waste Glass to Minimal Water Adsorption/Absorption Lightweight Aggregate by Rapid Low Temperature Sintering: Optimization by Dual Process-Mixture Response Surface Methodology. Environmental Science & Technology, 48 (13) : 7527 - 7535. doi: 10.1021/es5003499

Purvis OW, Convey P, Flowerdew MJ, Peat HJ, Najorka J, Kearsley A (2013) Iron localization in Acarospora colonizing schist on Signy Island. Antarctic Science, 25 (01) : 24 - 30. doi: 10.1017/S0954102012000582

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 (21) : 6374 - 6399. doi: 10.1016/j.gca.2011.08.025

Humphreys ER, Bailey K, Hawkesworth CJ, Wall F, Najorka J, Rankin AH (2010) Aragonite in olivine from Calatrava, Spain--Evidence for mantle carbonatite melts from >100 km depth. Geology, 38 (10) : 911 - 914. doi: 10.1130/G31199.1

Andrut M, Harlov DE, 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. doi: 10.1180/0026461046810179

Najorka J, Gottschalk M (2003) Crystal chemistry of tremolite-tschermakite solid solutions. Physics and Chemistry of Minerals, 30 (2) : 108 - 124. doi: 10.1007/s00269-002-0291-1

Mcdade P, Wood BJ, Van WestrenenW, Brooker R, Gudmundsson G, Soulard H, Najorka J, Blundy J (2002) Pressure corrections for a selection of piston-cylinder cell assemblies. Mineralogical Magazine, 66 (6) : 1021 - 1028. doi: 10.1180/0026461026660074

Najorka J, Gottschalk M, Heinrich W (2002) Composition of synthetic tremolite-tschermakite solid solutions in amphibole + anothite- and amphibole + zoisite-bearing assemblages. American Mineralogist: an international journal of earth and planetary materials, 87 : 462 - 477.

Andrut M, Gottschalk M, Melzer S, Najorka J (2000) Lattice vibrational modes in synthetic tremolite-Sr-tremolite and tremolite-richterite solid solutions. Physics and Chemistry of Minerals, 27 (5) : 301 - 309. doi: 10.1007/s002690050259

Najorka J, Gottschalk M, Franz G, Heinrich W (1999) Ca-Sr distribution among amphibole, clinopyroxene and chloride-bearing solution. American Mineralogist: an international journal of earth and planetary materials, 84 : 596 - 606.

Gottschalk M, Najorka J, Andrut M (1998) Structural and compositional characterization of synthetic (Ca,Sr)-tremolite and (Ca,Sr)-diopside solid solutions. Physics and Chemistry of Minerals, 25 (6) : 415 - 428. doi: 10.1007/s002690050131