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Citations since 2017
8 Research Items
Recently found historical jewellery (Czech Republic) was subjected to detailed analyses to determine the gem inlays and the gold framework in which they are embedded. Such find fits into European jewellery archaeological artefacts containing similar stones from around the fifth century CE. The gemstones were analysed with optical microscopy and Ram...
Rare hyalite opal showing green daylight fluorescence was discovered in the Erongo region, Namibia, sometime prior to 2000. Raman spectroscopy confirms this hyalite to be opal-A, and the most interesting feature of the Raman spectra are bands associated with the hydroxyl-stretching regions in the mineral's structure. A doublet at 3602/3665 cm-1 app...
Atypical bicolour grossulars were obtained at the gem market in Arusha, northern Tanzania. The stones were distinctly zonal and contained a nearly colourless portion with a pale yellowish tinge, bordered by a narrow intense green band and then a yellowish green zone. This zoning shown by specimens from Tanzania is quite different from the gradual s...
Identification of Non-metallic Parts of a Mediterranean Buckle from the Migration Period Exceptionally valuable artifacts were discovered in the region of Rakovník in 2020 as a wealth deposit of gold objects from the Migration Period, richly decorated with Czech garnets, almandine and glass. The gemstones on the studied archaeological artifacts we...
If we detect changes in the chemical composition (mostly zonal development or the occurrence of different mineral phases) via electron microprobe, it is also possible to assume the existence of structural changes visible in the Raman spectra in form of a band shifts or bandwidth variations. Presence of such changes may relate to substitution mechan...
Problematics of complicated chemistry across the epidote group is still challenging area, which can be used for better understanding of structures and their behavior on the basis of contained elements. Due to the presence of radioactive elements (U, Th) we can observe certain parts of crystalline, semi-crystalline and totally metamictized sections....
The study deals with the influence of salt mine waters and waters draining coal heaps on the environment of the Upper Silesian Coal Basin (Czech Republic). The presence of highly mineralized mine waters and waters draining heaps leads to the formation of incrustations and minerals in the watercourses in the area. Samples of mine waters, river sedim...
In order to understand certain chemical processes and how they correlate with inner structural changes in minerals, several analytical methods could be used. By using these methods in studying of minerals and materials (mostly with industrial applications) is of great importance for understanding the processes taking place at the atomic or molecular level. The development of hyperspectral imaging on a LA-ICP-MS, electron microprobe (WDS) and Raman spectroscopy brought interesting results in the field of crystallography and material research and the combination of such data sets offers great potential to improve both qualitative and quantitative description of results. Main goal of this research is ability to quantify data by combining results from Raman spectroscopy (structural fingerprint of molecules), electron probe microanalysis (elemental concentrations and distribution within sample) and LA-ICP-MS (highly sensitive elemental and isotopic analysis for the detection of trace elements) that could provide a very comprehensive tool for the investigation of structural/phase transitions and chemistry changes in the sample.