CHAKRABORTY, S., Mineralogisches-Petrographisches Institut, Universität zu Köln, Germany: 21.-22.04.1997
DE GRAVE, E., Department of Subatomic and Radiation Physics, University of Gent, Belgium: 14.-17.02.1997
DWIVEDI, M., Department of Earth & Planetary Sciences, Allahabad of University, India: 16.-24.10.1997
ENDERS, M., Institut für Mineralogie, Westfälische Wilhelms-Universität, Münster, Germany: 09.-23.07.1997
ERTEL, W., C.N.R.S., Orleans, France: 29.09.-17.10.1997
HÅLENIUS, E., Department of Mineralogy and Petrology, Institute of Earth Sciences, Uppsala, Sweden: 16.-18.06.1997
HÅLENIUS, U., Swedish Museum of Natural History, Department of Mineralogy, Stockholm, Sweden: 16.-18.06.1997
HEINE, V., University of Cambridge, Cavendish Laboratory, Cambridge, U.K.: 14.03.1997
MACKOVICKY, E.; Geological Institute, University of Copenhagen, Denmark: 06.-07.02.1997
OHTAKA, O.; Department of Earth and Space Science, Graduate School of Science, Osaka University, Osaka, Japan: 03.-08.12.1997
ROMANO, C., Third University, Rome, Italy: 27.01.-28.02.1997 and 25.04.-04.05.1997
SPEER, D., Institut für Mineralogie, Westfälische Wilhelms-Universität, Münster, Germany: 09.-23.07.1997
ZUNIC, T.B., Geological Institute, University of Copenhagen, Denmark: 06.-07.02.1997