Equipment
High-temperature Furnaces (1300°C) for experiments in air and at low oxygen fugacities, using H2/CO2 gas mixtures regulated by mass-flow controllers. The oxygen fugacity can be monitored by use of solid electrolyte oxygen sensors. This equpiment is mostly used for crystal synthesis by flux-growth methods.
X-ray Powder Diffractometer (Philips PW1050) with graphite monochromator.
Mössbauer Spectrometer
Scanning Electron Microscope (Hitachi S-4300 FE-SEM) with accessory equipment for energy dispersive X-ray analyses (EDS) and cathodoluminiscens imaging (MiniCL and MonoCL) provides excellent possibilities for microchemical studies and imaging of solid phases.Mössbauer Spectrometer (Wissel) for studies of Fe valence states and coordination in minerals. Spectra can be obtained at ambient and low-temperature by use of a liquid-nitrogen cryostat. Normal samples should contain 2-5 mg Fe, with a total weight limit around 100 mg. (picture right)
Microscope-Spectrophotometer (Zeiss MPM800) for measurements of optical absorption or transmission spectra in the UV-VIS-NIR range from ca. 280 to ca. 2200 nm. The spatial resolution of the instrument allows measurements of polarised optical spectra of small (Ø~20 µm) single crystals at a spectral resolution of 1 nm. The equipment is mainly used for studies of valency and coordination of transition metal cations in solids through analyses of absorption bands caused by electron transitions, but numerous other applications are possible. An accessory diamond anvil cell (DAC) provides means to record absorption spectra at elevated pressures. (picture left).
FTIR spectrometer (Bruker IFS55/S) for measurements of transmission spectra in the MIR-NIR wavelength ranges (400-10 000 cm -1). The instrument is equipped with an IR microscope, beam consender and a dry-air purging system. Polarised spectra can be measured in the range 400- 8 000 cm -1. This instrument is mostly used for measuring vibrational modes of molecular species (e.g. OH, H2O, CO3) in minerals. (picture below)
FTIR spectrometer
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