Dr. Kilian Pollok

since 07/2011: Staff scientist, Institut für Geowissenschaften, Friedrich-Schiller-Universität Jena

04/2008 - 07/2011: Akademischer Rat at Bayerisches Geoinstitut (BGI), Universität Bayreuth; Head of the BMBF junior research group MIMOS in geotechnology program "Mineral surfaces"

09/2005 - 03/2008: Postdoc, Institut für Geowissenschaften, Friedrich-Schiller-Universität Jena

1999 - 2005: Scientific assistant at the Westfälische Wilhelms-Universität Münster

2005 Graduation to Dr. rer. nat., Supervisor: Prof. Andrew Putnis

Titel of dissertation: "Crystal growth patterns in solid solution systems: Case studies on oscillatory zoning and mineral replacement reactions"

1999 - 2005: Doctorate study at the Westfälischen Wilhelms-Universität Münster

1999 Diploma in mineralogy at the Westfälischen Wilhelms-Universität Münster

Titel of the diploma thesis: "Elektronenmikroskopische und mikroanalytische Untersuchungen an zonierten und anisotropen Granaten" [Electron microscopic and microanalytical study on zoned and anisotropic garnets]

1995 - 1999: Academic studies in mineralogy at the Westfälischen Wilhelms-Universität Münster

1993 - 1995: Academic studies in mineralogy at the Phillips-Universität Marburg

 

Potapov,A., Pollok, K., Langenhorst, F., McCoustra, M., Garrod, R.T. (2025). Cosmic Dust as a Prerequisite for the Formation of Complex Organic Molecules in Space? The Astrophysical Journal, 993:43, https://doi.org/10.3847/1538-4357/ae08aeExternal link

Schröder, J., Reupert, A., Pollok, K., Langenhorst, F., Wondraczek, L. (2025). Functional Optical Fibers with Tailored Side Emission from Modified Rod-in-Tube Preforms. Adv. Photonics Res. 2500018. https://doi.org/10.1002/adpr.202500018External link

Richter, M., Pollok, K., Onuzi, K., Ustaszewski, K. (2025). Tectonometamorphic evolution of a subduction plate interface at the base of the Mirdita Ophiolite (Bajram Curri, northeastern Albania). Swiss J Geosci.  https://doi.org/10.1186/s00015-024-00472-5External link

Tkalcec, B.J., et al. (+39 coautors) (2024). A comprehensive study of apatite grains in Ryugu rock fragments. Meteorit Planet Sci., https://doi.org/10.1111/maps.14177External link

Seybold, L., Trepmann, C.A., Hölzl, S., Pollok, K., Langenhorst, F., Dellefant, F., Kaliwoda, M. (2023). Twinned calcite as an indicator of high differential stresses and low shock pressure conditions during impact cratering. Meteorit Planet Sci, 58: 1287-1305. https://doi.org/10.1111/maps.14056External link

Hamann, C., Kurosawa, K., Ono, H., Tada, T., Langenhorst, F., Pollok, K., Genda, H., Niihara, T., Okamoto, T., Matsui, T. (2023). Experimental evidence for shear-induced melting and generation of stishovite in granite at low (<18 GPa) shock pressure. Journal of Geophysical Research: Planets, 128, e2023JE007742. https://doi.org/10.1029/2023JE007742External link

Ondrejka, M., Uher, P., Ferenc, Š, Majzlan, J., Pollok, K., Mikuš, T., Milovská, S., Molnárová, A., Škoda, R., Kopáčik, R., Kurylo, S., Bačík, P. (2023). Monazite-(Gd), a new Gd-dominant mineral of the monazite group from the Zimná Voda REE-U-Au quartz vein, Prakovce, Western Carpathians, Slovakia. Mineralogical Magazine, 1-22. https://doi.org/10.1180/mgm.2023.37External link

Cheng, P.F., Ziegler, M., Ripka, V., Wang, H.L., Pollok, K., Langenhorst, F., Wang, D., Schaaf, P. (2022). Black Silver: Three-Dimensional Ag Hybrid Plasmonic Nanostructures with Strong Photon Coupling for Scalable Photothermoelectric Power Generation. ACS Applied Materials & Interfaces, https://doi.org/10.1021/acsami.2c01181External link

Haase, P., Kiefer, S., Pollok, K., Drahota, P., Majzlan, J. (2022) Weathering of stannite–kësterite [Cu₂(Fe,Zn)SnS₄] and the environmental mobility of the released elements. European Journal of Mineralogy, 34(5), 493-506. https://doi.org/10.5194/ejm-34-493-2022External link

Kodera, P., Majzlan J., Pollok, K., Kiefer, S., Simko, F., Scholtzová, E., Luptáková, J., Cawthorn, G. (2022) Ferrous hydroxychlorides hibbingite (γ-Fe₂(OH)₃Cl) and parahibbingite (β-Fe₂(OH)₃Cl) as a concealed sink of Cl and H2O in ultrabasic and granitic systems. American Mineralogist, 107(5), 826-841. https://doi.org/10.2138/am-2022-8011External link

Cheng, P., Ziegler, M., Ripka, V., Wang, H., Pollok, K., Langenhorst, F., Wang, D., & Schaaf, P. (2022). Black Silver: Three-Dimensional Ag Hybrid Plasmonic Nanostructures with Strong Photon Coupling for Scalable Photothermoelectric Power Generation. ACS Appl. Mater. Interfaces. https://doi.org/10.1021/acsami.2c01181External link

Pellegrino, L., Menegon, L., Zanchetta, S., Langenhorst, F., Pollok, K., Tumiati, S., Malaspina, N. (2021). Reaction-induced mantle weakening at high-pressure conditions: An example from garnet pyroxenites of Ulten Zone (Eastern Alps, N Italy). Journal of Geophysical Research: Solid Earth, 126, e2021JB022584. https://doi.org/10.1029/2021JB022584External link

Nabhan, S., Kah, L.C., Mishra, B., Pollok, K., Manning-Berg, A.R., van Zuilen, M.A. (2021). Structural and chemical heterogeneity of Proterozoic organic microfossils of the ca. 1 Ga old Angmaat Formation, Baffin Island, Canada. Geobiology, 19, 557– 584. https://doi.org/10.1111/gbi.12463External link

Palaniselvam, T., Mukundan, C., Hasa, I., Santhosha, A. L., Goktas, M., Moon, H., Ruttert, M., Schmuch, R., Pollok, K., Langenhorst, F., Winter, M., Passerini, S., & Adelhelm, P. (2020). Assessment on the Use of High Capacity "Sn4P3"/NHC Composite Electrodes for Sodium-Ion Batteries with Ether and Carbonate Electrolytes. Advanced Functional Materials, 2004798. https://doi.org/10.1002/adfm.202004798External link

Ziegler, M., Dathe, A., Pollok, K., Langenhorst, F., Hübner, U, Dong, W., & Schaaf, P. (2020). Metastable Atomic Layer Deposition: 3D Self-Assembly toward Ultradark Materials. ACS Nano, 14(11), 15023-15031 https://doi.org/10.1021/acsnano.0c04974External link

Nayak, P. K., Yang, L. T., Pollok, K., Langenhorst, F., Aurbach, D., & Adelhelm, P. (2019). Investigation of Li1.17Ni0.20Mn0.53Co0.10O2 as an Interesting Li- and Mn-Rich Layered Oxide Cathode Material through Electrochemistry, Microscopy, and InSitu Electrochemical Dilatometry. Chemelectrochem, 6(10), 2812-2819. https://doi.org/10.1002/celc.201900453External link

Nayak, P. K., Yang, L. T., Pollok, K., Langenhorst, F., Wondraczek, L., & Adelhelm, P. (2019). Electrochemical Performance and Ageing Mechanisms of Sol-Gel Synthesized Na-2/3[Mn3/5Fe2/5]O-2 for Sodium-Ion Batteries. Batteries & Supercaps, 2(1), 104-111. https://doi.org/10.1002/batt.201800034External link

Pang, R. L., Harries, D., Pollok, K., Zhang, A. C., & Langenhorst, F. (2019). Unique mineral assemblages of shock-induced titanium-rich melt pockets in eucrite Northwest Africa 8003. Geochemistry, 79(4), 125541. https://doi.org/10.1016/j.chemer.2019.125541External link

Santhosha, A. L., Nayak, P. K., Pollok, K., Langenhorst, F., & Adelhelm, P. (2019). Exfoliated MoS2 as Electrode for All-Solid-State Rechargeable Lithium-Ion Batteries. Journal of Physical Chemistry C, 123(19), 12126-12134. https://doi.org/10.1021/acs.jpcc.9b01816External link

Schmidt, D., Pollok, K., Matthaus, G., Nolte, S., & Langenhorst, F. (2019). Nanodeformation in enstatite single crystals: Simulation of micrometeoroid impacts by femtosecond pulsed laser experiments. Geochemistry, 79(4). https://doi.org/10.1016/j.chemer.2019.125542External link

Drunert, F., Blanz, M., Pollok, K., Pan, Z., Wondraczek, L., & Moncke, D. (2018). Copper-based opaque red glasses - Understanding the colouring mechanism of copper nanoparticles in archaeological glass samples. Optical Materials, 76, 375-381. https://doi.org/10.1016/j.optmat.2017.12.054External link

Fazio, A., Pollok, K., & Langenhorst, F. (2018). Experimental evidence for mechanical Brazil twins as an indicator of low-pressure shock metamorphism (< 17.5 GPa). Geology, 46(9), 787-790. https://doi.org/10.1130/G40198.1External link

Goktas, M., Bolli, C., Berg, E. J., Novak, P., Pollok, K., Langenhorst, F., Roeder, M. V., Lenchuk, O., Mollenhauer, D., & Adelhelm, P. (2018). Graphite as Cointercalation Electrode for Sodium-Ion Batteries: Electrode Dynamics and the Missing Solid Electrolyte Interphase (SEI). Advanced Energy Materials, 8(16), 1702724. https://doi.org/10.1002/aenm.201702724External link

Majzlan, J., Stevko, M., Chovan, M., Luptakova, J., Milovska, S., Milovsky, R., Jelen, S., Sykorova, M., Pollok, K., Gottlicher, J., & Kupka, D. (2018). Mineralogy and geochemistry of the copper-dominated neutral mine drainage at the Cu deposit Lubietova-Podlipa (Slovakia). Applied Geochemistry, 92, 59-70. https://doi.org/10.1016/j.apgeochem.2018.02.012External link

Martignier, A., Filella, M., Pollok, K., Melkonian, M., Bensimon, M., Barja, F., Langenhorst, F., Jaquet, J. M., & Ariztegui, D. (2018). Marine and freshwater micropearls: biomineralization producing strontium-rich amorphous calcium carbonate inclusions is widespread in the genus Tetraselmis (Chlorophyta). Biogeosciences, 15(21), 6591-6605. https://doi.org/10.5194/bg-15-6591-2018External link

Pang, R. L., Harries, D., Pollok, K., Zhang, A. C., & Langenhorst, F. (2018). Vestaite, (Ti4+Fe2+)Ti34+O9, a new mineral in the shocked eucrite Northwest Africa 8003. American Mineralogist, 103(9), 1502-1511. https://doi.org/10.2138/am-2018-6522External link

Gualtieri, A. F., Gandolfi, N. B., Pollastri, S., Burghammer, M., Tibaldi, E., Belpoggi, F., Pollok, K., Langenhorst, F., Vigliaturo, R., & Drazic, G. (2017). New insights into the toxicity of mineral fibres: A combined in situ synchrotron mu-XRD and HR-TEM study of chrysotile, crocidolite, and erionite fibres found in the tissues of Sprague-Dawley rats. Toxicology Letters, 274, 20-30. https://doi.org/10.1016/j.toxlet.2017.04.004External link

Martignier, A., Pacton, M., Filella, M., Jaquet, J. M., Barja, F., Pollok, K., Langenhorst, F., Lavigne, S., Guagliardo, P., Kilburn, M. R., Thomas, C., Martini, R., & Ariztegui, D. (2017). Intracellular amorphous carbonates uncover a new biomineralization process in eukaryotes. Geobiology, 15(2), 240-253. https://doi.org/10.1111/gbi.12213External link

Nakatsuka, Y., Pollok, K., Wieduwilt, T., Langenhorst, F., Schmidt, M. A., Fujita, K., Murai, S., Tanaka, K., & Wondraczek, L. (2017). Giant Faraday Rotation through Ultrasmall Fe-n(0) Clusters in Superparamagnetic FeO-SiO2 Vitreous Films. Advanced Science, 4(4), 1600299. https://doi.org/10.1002/advs.201600299External link

Pollastri, S., Gigli, L., Ferretti, P., Andreozzi, G. B., Gandolfi, N. B., Pollok, K., & Gualtieri, A. F. (2017). The crystal structure of mineral fibres. 3. Actinolite asbestos. Periodico Di Mineralogia, 86(2), 89-98. https://doi.org/10.2451/2017pm714External link

Pollastri, S., Perchiazzi, N., Gigli, L., Ferretti, P., Cavallo, A., Gandolfi, N. B., Pollok, K., & Gualtieri, A. F. (2017). The crystal structure of mineral fibres. 2. Amosite and fibrous anthophyllite. Periodico Di Mineralogia, 86(1), 55-65. https://doi.org/10.2451/2017pm693External link

Ziegler, M., Yuksel, S., Goerke, S., Weber, K., Cialla-May, D., Popp, J., Pollok, K., Wang, D., Langenhorst, F., Hubner, U., Schaaf, P., & Meyer, H. G. (2017). Growth of Hierarchically 3D Silver-Silica Hybrid Nanostructures by Metastable State Assisted Atomic Layer Deposition (MS-ALD). Advanced Materials Technologies, 2(7). https://doi.org/10.1002/admt.201700015External link

Gualtieri, A. F., Gandolfi, N. B., Pollastri, S., Pollok, K., & Langenhorst, F. (2016). Where is iron in erionite? A multidisciplinary study on fibrous erionite-Na from Jersey (Nevada, USA). Scientific Reports, 6, 37981. https://doi.org/10.1038/srep37981External link

Fischer, R. A., Nakajima, Y., Campbell, A. J., Frost, D. J., Harries, D., Langenhorst, F., Miyajima, N., Pollok, K., & Rubie, D. C. (2015). High pressure metal-silicate partitioning of Ni, Co, V, Cr, Si, and O. Geochimica Et Cosmochimica Acta, 167, 177-194. https://doi.org/10.1016/j.gca.2015.06.026External link

Peiffer, S., Behrends, T., Hellige, K., Larese-Casanova, P., Wan, M., & Pollok, K. (2015). Pyrite formation and mineral transformation pathways upon sulfidation of ferric hydroxides depend on mineral type and sulfide concentration. Chemical Geology, 400, 44-55. https://doi.org/10.1016/j.chemgeo.2015.01.023External link

Schaffner, F., Merten, D., Pollok, K., Wagner, S., Knoblauch, S., Langenhorst, F., & Buchel, G. (2015). Fast formation of supergene Mn oxides/hydroxides under acidic conditions in the oxic/anoxic transition zone of a shallow aquifer. Environmental Science and Pollution Research, 22(24), 19362-19375. https://doi.org/10.1007/s11356-015-4404-zExternal link

Yuksel, S., Ziegler, M., Goerke, S., Hubner, U., Pollok, K., Langenhorst, F., Weber, K., Cialla-May, D., & Popp, J. (2015). Background-Free Bottom-Up Plasmonic Arrays with Increased Sensitivity, Specificity and Shelf Life for SERS Detection Schemes. Journal of Physical Chemistry C, 119(24), 13791-13798. https://doi.org/10.1021/acs.jpcc.5b01389External link

Langenhorst, F., Harries, D., Pollok, K., & van Aken, P. A. (2014). Mineralogy and defect microstructure of an olivine-dominated Itokawa dust particle: evidence for shock metamorphism, collisional fragmentation, and LL chondrite origin. Earth Planets and Space, 66. https://doi.org/10.1186/1880-5981-66-118External link

Paikaray, S., Essilfie-Dughan, J., Gottlicher, J., Pollok, K., & Peiffer, S. (2014). Redox stability of As(III) on schwertmannite surfaces. Journal of Hazardous Materials, 265, 208-216. https://doi.org/10.1016/j.jhazmat.2013.11.068External link

Pollok, K., Heidelbach, F., John, T., & Langenhorst, F. (2014). Spherulitic omphacite in pseudotachylytes: Microstructures related to fast crystal growth from seismic melt at eclogite-facies conditions. Chemie Der Erde-Geochemistry, 74(3), 407-418. https://doi.org/10.1016/j.chemer.2014.04.001External link

Harries, D., Pollok, K., & Langenhorst, F. (2013). Oxidative dissolution of 4C- and NC-pyrrhotite: Intrinsic reactivity differences, pH dependence, and the effect of anisotropy. Geochimica Et Cosmochimica Acta, 102, 23-44. https://doi.org/10.1016/j.gca.2012.10.021External link

Langenhorst, F., Harries, D., & Pollok, K. (2013). Non-stoichiometry, defects and superstructures in sulfide and oxide minerals. Minerals at the Nanoscale, 14, 261-295. https://doi.org/10.1180/EMU-notes.14.8External link

Qui, N. V., Scholz, P., Keller, T. F., Pollok, K., & Ondruschka, B. (2013). Ozonated Multiwalled Carbon Nanotubes as Highly Active and Selective Catalyst in the Oxidative Dehydrogenation of Ethyl Benzene to Styrene. Chemical Engineering & Technology, 36(2), 300-306. https://doi.org/10.1002/ceat.201200354External link

Sitte, J., Pollok, K., Langenhorst, F., & Kusel, K. (2013). Nanocrystalline Nickel and Cobalt Sulfides Formed by a Heavy Metal-Tolerant, Sulfate-Reducing Enrichment Culture. Geomicrobiology Journal, 30(1), 36-47. https://doi.org/10.1080/01490451.2011.653082External link

Hellige, K., Pollok, K., Larese-Casanova, P., Behrends, T., & Peiffer, S. (2012). Pathways of ferrous iron mineral formation upon sulfidation of lepidocrocite surfaces. Geochimica Et Cosmochimica Acta, 81, 69-81. https://doi.org/10.1016/j.gca.2011.12.014External link

Harries, D., Pollok, K., & Langenhorst, F. (2011). Translation interface modulation in NC-pyrrhotites: Direct imaging by TEM and a model toward understanding partially disordered structural states. American Mineralogist, 96(5-6), 716-731. https://doi.org/10.2138/am.2011.3644External link

Pollok, K., Putnis, C. V., & Putnis, A. (2011). Mineral Replacement Reactions in Solid Solution-Aqueous Solution Systems: Volume Changes, Reactions Paths and End-Points Using the Example of Model Salt Systems. American Journal of Science, 311(3), 211-236. https://doi.org/10.2475/03.2011.02External link

Qui, N. V., Scholz, P., Krech, T., Keller, T. F., Pollok, K., & Ondruschka, B. (2011). Multiwalled carbon nanotubes oxidized by UV/H2O2 as catalyst for oxidative dehydrogenation of ethylbenzene. Catalysis Communications, 12(6), 464-469. https://doi.org/10.1016/j.catcom.2010.11.007External link

Sushil, S., Scholz, P., Pollok, K., Ondruschka, B., & Batra, V. S. (2011). Application of industrial waste based catalysts for total oxidation of propane. Chemical Engineering Journal, 166(2), 568-578. https://doi.org/10.1016/j.cej.2010.11.024External link

Hopf, J., Langenhorst, F., Pollok, K., Merten, D., & Kothe, E. (2009). Influence of microorganisms on biotite dissolution: An experimental approach. Chemie Der Erde-Geochemistry, 69, 45-56. https://doi.org/10.1016/j.chemer.2008.11.001External link

Nigrovski, B., Scholz, P., Krech, T., Qui, N. V., Pollok, K., Keller, T., & Ondruschka, B. (2009). The influence of microwave heating on the texture and catalytic properties of oxidized multi-walled carbon nanotubes. Catalysis Communications, 10(11), 1473-1477. https://doi.org/10.1016/j.catcom.2009.03.023External link

Nigrovski, B., Zavyalova, U., Scholz, P., Pollok, K., Muller, M., & Ondruschka, B. (2008). Microwave-assisted catalytic oxidative dehydrogenation of ethylbenzene on iron oxide loaded carbon nanotubes. Carbon, 46(13), 1678-1686. https://doi.org/10.1016/j.carbon.2008.07.009External link

Pollok, K., Lloyd, G. E., Austrheim, H., & Putnis, A. (2008). Complex replacement patterns in garnets from Bergen Arcs eclogites: A combined EBSD and analytical TEM study. Chemie Der Erde-Geochemistry, 68(2), 177-191. https://doi.org/10.1016/j.chemer.2007.12.002External link

Zavyalova, U., Nigrovski, B., Pollok, K., Langenhorst, F., Muller, B., Scholz, P., & Ondruschka, B. (2008). Gel-combustion synthesis of nanocrystalline spinel catalysts for VOCs elimination. Applied Catalysis B-Environmental, 83(3-4), 221-228. https://doi.org/10.1016/j.apcatb.2008.02.015External link

Geisler, T., Seydoux-Guillaume, A. M., Poeml, P., Golla-Schindler, U., Berndt, J., Wirth, R., Pollok, K., Janssen, A., & Putnis, A. (2005). Experimental hydrothermal alteration of crystalline and radiation-damaged pyrochlore. Journal of Nuclear Materials, 344(1-3), 17-23. https://doi.org/10.1016/j.jnucmat.2005.04.009External link

Geisler, T., Berndt, J., Meyer, H. W., Pollok, K., & Putnis, A. (2004). Low-temperature aqueous alteration of crystalline pyrochlore: correspondence between nature and experiment. Mineralogical Magazine, 68(6), 905-922. https://doi.org/10.1180/0026461046860230External link

Becker, U., & Pollok, K. (2002). Molecular simulations of interfacial and thermodynamic mixing properties of grossular-andradite garnets. Physics and Chemistry of Minerals, 29(1), 52-64. https://doi.org/10.1007/s002690100211External link

Kostenko, O., Jamtveit, B., Austrheim, H., Pollok, K., & Putnis, C. (2002). The mechanism of fluid infiltration in peridotites at Almklovdalen, western Norway. Geofluids, 2(3), 203-215. https://doi.org/DOI 10.1046/j.1468-8123.2002.00038External link

Pollok, K., Jamtveit, B., & Putnis, A. (2001). Analytical transmission electron microscopy of oscillatory zoned grandite garnets. Contributions to Mineralogy and Petrology, 141(3), 358-366. https://doi.org/DOI 10.1007/s004100100248External link