Institut für Mineralogie und Kristallographie
Faculty of Geosciences, Geography and Astronomy
University of Vienna

Althanstr. 14 (UZA 2), A-1090 Wien

Secretary: Mo-Mi: 9-12 & 13-16; Do: 13-17; Fr: 9-13;
Tel.: (+431) 4277 53201, FAX: (+431) 4277 9532,
Email.: mineralogie@univie.ac.at

Diamond crystal (size 5 mm) from Juina, Brazil 
   "Nature" article describing 'wet' diamond

Deutsch  
         

 

 

 

 

Staff Studies Research News Location Links
   

Christoph Lenz


Christoph Lenz, Dipl.-Min.

Room number: 2A249
Phone number: (+431) 4277 53280

 

 

   
     Curriculum vitae
2004 – 2007
Basic studies of mineralogy at the Technical University Bergakademie Freiberg, Institute of Mineralogy
Mentor: Prof. Dr. D. Wolf / Prof. Dr. G. Heide
 
2007 – 2009
Advanced studies with focus on "Technical Mineralogy“ at the Technical University Bergakademie Freiberg
Mentor: Prof. Dr. G. Heide; Prof. Dr. J. Götze
 
2009 – 2010

Diploma thesis about the topic: „Correlation between atomic M-O distance and cathodoluminescence of selected carbonate minerals”
Mentor: Prof. Dr. J. Götze

 
since 2010

Doctorate position at the Institute of Mineralogy & Crystallography, University of Vienna
Mentor: Prof. Dr. Lutz Nasdala

   
 

Research field: Spectroscopy in mineralogy

 

Research topic:
Luminescence of Lanthanides (Rare Earth Elements, REE) – Probes of structural variations in minerals

   
 

(1) Characterization/Quantification of order-disorder phenomena caused by the accumulation of radiation damage in zircon, xenotime & monazite.

 

Abb.1

Fig.: Photoluminescence spectra of REE3+ in metamict fergusonite (Ce, La,Y, Ln)NbO4. Heating experiments at different temperatures lead to a gradual recovery of crystallinity of the radiation-damaged mineral (after Ruschel et al. 2010).

Reference
Ruschel, K., Nasdala, L., Rhede, D., Wirth, R., Lengauer, C., and Libowitzky, E. (2010): Chemical alteration patterns in metamict fergusonite. European Journal of Mineralogy, 22(3), 425.

 

 

   
 
 

(2) Structural variation of minerals under extreme conditions (HT/HP): Characterization possibilities of REE-luminescence probes.

   

 

(3) Phase-identification by REE-luminescence: Characteristic luminescence fingerprints.

 

Abb.1

 

Fig.: Photoluminescence spectra of synthetic xenotime & monazite doped with Sm3+ at 77K. Different cation-site symmetries affect the crystal-field splitting of luminescence transitions. Therefore, the luminescene signal is characteristic for the mineral (fingerprint method).

   
  Publications - Abstracts
 

Lenz, C., Ruschel, K., Kronz, A., Talla, D., Škoda, R., and Nasdala, L. (2012): A Nd3+ luminescence spectroscopic study on the structural disorder of monazite-(Ce). European Mineralogical Conference Vol. 1, EMC2012-458
(http://meetingorganizer.copernicus.org/EMC2012/EMC2012-458.pdf)

Petautschnig, C., Götze, J., Lenz, C., Nasdala, L. and Rericha, A. (2012): Micro-Raman spectroscopy of annealed Mali onyx agate and man-made analogues. GeoRaman '10 Conference (Nancy, France). Book of Abstracts, p. 261-262

Lenz, C., Petautschnig, C., Akhmadaliev, S., Hanf, D., Talla, D., Nasdala, L. (2012): Combined Raman and photoluminescence spectroscopic investigation of He-irradiation effects in monazite. Geophysical Research Abstracts Vol. 14, EGU2012-11138

Lenz, C., Talla, D. & Nasdala, L. (2011): Orientation-dependent REE photoluminescence of zircon, xenotime and monazite. In Zeitschrift für Kristallographie – Supplements Nr. 31/2011, p. 139.

Lenz, C. & Götze, J. (2011):  Manganese-activated cathodoluminescence of selected carbonate minerals. In Conference on Micro-Raman and Luminescence Studies in the Earth and Planetary Sciences (CORALS II), p. 54. LPI Contribution No. 1616, Lunar and Planetary Institute, Houston.

   
 
14.03.2014/ZW