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| Determination of lattice parameters (X-rays) on single crystals, X-ray diffraction patterns of polycrystalline samples at CCD diffractometer, non-destructive. |
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Ring with emerald imitation
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Magnesite (dyed) with powder diffraction lines |
Turquoise with powder diffraction lines |
Gibbsite (dyed) with powder diffraction lines |
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| Goniometer |
Fireopal (upper line) and glass imitation
with X-ray patterns
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Chalcedony and synthetic hydrothermal quartz
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Quartz: powder and single crystal diffraction images
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Quantitative chemical analysis with TRACER IV_SD handheld XRF analyzer.
Non-destructive investigations of single crystals, polycrystalline samples, glass and metals. |
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| Ruby, lead-glass filled |
" Malossi " emerald, hydrothermal |
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| Disthene, Mn-bearing |
Titanclinohumite |
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| Elbaite " Paraiba "-colored |
GGG (gadolinium gallium garnet) |
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| Philippus I, 244-249, Antoninian Roman silver coin |
Salt cup, uranium glass, Art Deco about 1930 |
| Contact: Gerald Giester & Helmut Pristacz |
| Gem and micro photographs. |
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| Stibiotantalite |
Vesuvianite |
Pezzottaite |
Fluorite |
Inclusions in diamond: chromite (left),
pyrope (right) |
Topaz, coated |
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| Synthetic quartz (hydrothermal,with seed plate) |
Periclase, synthetic |
Synth. sapphire with
growth features |
"Gilson" star sapphire, synthetic |
Knischka Ruby, Flux |
Bismuthgermanate, synthetic |
 
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| Emerald imitation (synthetic corundum) |
Rhodonite |
Synth. spinel with moonstone effect |
Forsterite |
Olivine imitation (triplet, synth. spinel) |
Aragonite |
| Contact: Gerald Giester & Herta Effenberger |
| Confocal micro Raman spectroscopy, UV luminescence microscopy, photo luminescence spectroscopy (PL). |
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Corundum crystal from Sri Lanka, with an included spinel crystal (red arrow) in its
centre. The inset (width of photograph approx. 2 mm) is a detail enlargement showing the
spinel, which is 2 mm behind the corundum surface (left), Raman shift (right)
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Natural emerald crystal in a mica schist from the Habach valley, Austrian Alps, with
two cut stones. Width of photograph 2.5 cm. The clarity of the cabochon at the right
was enhanced by treatment with cedar wood oil (left), Raman shift (right)
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| All figures from: Nasdala, L., Banerjee, A., Häger, T., Hofmeister, W. (2001): Laser-Raman micro-spectroscopy in mineralogical research. – Microscopy and Analysis, Europ. ed. 70: 7-9. |
| Contact: Lutz Nasdala & Eugen Libowitzky |
| Spectroscopical investigations with UV, VIS and IR, sometimes with reflection technologies. |
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| Hydrothermally synthesised amethyst (left) and the IR spectrum in the OH stretching vibrational region (right) |
Characterisation of submicroscopic hydrous mineral inclusions: IR spectra of sapphires in the OH stretching vibrational region, taken through turbid crystal parts;
a) OH bands of kaolinite, b) OH bands of diaspore |
| Contact: Manfred Wildner, Eugen Libowitzky & Anton Beran |
KL-images and spectroscopy, EDX micro-analytics on scanning electron microscope, optical inclusion microscopy.
Contact: Michael Götzinger |
Powder X-ray diffraction, investigation of pearls (non-destructive), reflection measurement in the visible spectral range.
Contact: Christian Lengauer |
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