Dear colleagues, Prof. Dr. André Stesmans [KULeuven (Leuven University, Belgium), Dept of Physics and Astronomy, Section Semiconductor Physics] is looking for small samples of various chalcogenide species with variable trace element content for research in the semiconductor field. * Most wanted is molybdenite (that's the most easy one) from various localities (and thus containing various levels of trace elements) and * its dimorph jordisite. * Tungstenite (WS2) * Drysdalite [Mo(Se,S)2] * and some species that have not been discovered so far in nature (as far as I know): HfS2, HfSe2, WSe2. He knows about such species that are commercially available, but if you have possibly a small sample of such materials that you would be willing to share, that could help as a sample with a different trace element fingerprint, which would be welcome too. He needs samples of about 1 X 10 mm or larger. If you would be so kind to share one or more samples of the mentioned species you can contact me or directly Prof. Stesmans via his e-mail address <mailto:andre.stesmans@kuleuven.be> <andre.stesmans@kuleuven.be> For technical questions about the suitability of possible samples please contact him directly. If reactions are sent to the MSA-Talk list I will forward them, as he is not a MSA-member. Suggestions on the availability of the mentioned species are always welcome too, of course. Thank you very much for your cooperation and best regards, Rik DILLEN E-mail <mailto:rik.dillen@skynet.be> rik.dillen@skynet.be