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Singing at the CTO

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16th October 2017: Teambuilding - Singtar evening Verena was so kind and organized a further teamevent ...  mehr zu Singing at the CTO (Titel)

Next step in life

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24th October 2017: Time to say goodbye Our colleague Paul successfully celebrated ...  mehr zu Next step in life (Titel)

WCCE 2017, Barcelona, Spain

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1st-5th October 2017: 10th World Congress of Chemical Engineering, Barcelona, Spain Patricia and Andreas were lucky to attend ...  mehr zu WCCE 2017, Barcelona, Spain (Titel)

Chemie Tage 2017, Salzburg, Austria

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25th-28th September 2017: 17th Austrian Chemistry Days, Salzburg, Austria Our institute was well represented at this year’s ...  mehr zu Chemie Tage 2017, Salzburg, Austria (Titel)

PDDG 2017, Toarmina, Italy

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3rd-7th Sepember 2017: 32nd Polymer Degradation Discussion Group conference, Toarmina, Italy Our college Sandra visited the ...  mehr zu PDDG 2017, Toarmina, Italy (Titel)

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Mineral- and Gemstone Analysis

By using vibrational spectroscopy such as Infrared or Raman we determine the nature of minerals or facetted gemstones. One goal of this project is to generate a major database of referenced samples of known locality and treatment in order to not only be able to identify unknown samples, but also to assign the material to certain localities – in the best case to the mine where the stone was found.
Inclusions are unwanted in facetted stones, however, they can help tremendously in the identification and determination of origin. With confocal Raman microscopy we can not ónly look at these inclusions, we can even identify them on basis of their Raman spectra – without the need to destroy the sample.

Another way of getting valuable information is chemical analysis of a sample. With icp MS we can „atomize“ the sample and identify almost all chemical elements, typically down to the parts per million range. In order to get this information a small amount of the mineral (around 10 mg) has to be dissolved in a microwave assisted high pressure vessel or a solid sample is can be directly analyzed using laser ablation. The latter process is almost non destructive and therefore well applicable for gemstones analysis (like determination of beryllium diffusion in sapphires).

Instrumentation:
Thermo Scientific DXR Raman microscope with fiber optic, various lasers and liquid nitrogen option
Thermo Scientific iN10 MX FTIR microscope mit iZ10 accesory
Thermo Scientific Contiuµm FTIR microscope with Nicolet 5700 spectrometer
Thermo Scientific X series II icp MS
Cetac Laser ablation system LSX-213 G2+
CEM microwave dissolution system