A unique high pressure apparatus for X-ray diffraction studies of phase transitions up to 5 kbar |
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| Affiliation: | 1. Department of Technology, State University of Maringá, Ângelo Moreira da Fonseca Avenue, 1800, 87506-370 Umuarama, Paraná, Brazil;2. Department of Chemical Engineering, State University of Maringá, Colombo Avenue, 5790, 87020-900 Maringá, Paraná, Brazil;3. Federal Institute of Paraná, PR 323, km 310, 87507-014 Umuarama, Paraná, Brazil;4. Department of Pharmacology and Therapeutics, State University of Maringá, Colombo Avenue, 5790, 87020-900 Maringá, Paraná, Brazil |
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| Abstract: | A new high pressure apparatus equipped with a beryllium pressure cell for X-ray diffraction experiments up to 5 kbar is described. The apparatus is especially designed for studying phase transitions in crystalline solids. The pressure generator has the capabilities of controlling pressure with precision of ± 2 bars and of performing a quick change in pressure applied to a sample. The beryllium miniature cell is press-fitted with a supporting jacket which has a large aperture for X-ray beams; therefore, a greater portion in reciprocal space can be surveyed. By using synchrotron radiation X-rays, we have carried out a test experiment on the incommensurate-commensurate phase transition in [N(CH3)4]2MnCl4. |
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