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updated continuously; for suggestions please send an e-mail 12th MECC 2026 After the 11th MECC 2024 in Pilsen/CZ, the next MECC will be organised by the DTTG. It will be held from 6-11 September 2026 in Zurich/CH. More information soon at: mecc2026.dttg.org and www.dttg.org. We hope to see you in Zurich! 11th International DTTG-Workshop "Qualitative and Quantitative Analysis of Clays and Clay Minerals" 2025 This year's 11th International Workshop of the DTTG was held in the beautiful and historic city of Krakow in Poland. The event was organised by the Institute of Geological Sciences of the Polish Academy of Sciences (IAP PAS) under the direction of Professor Derkowski and his dedicated team. The participants were offered a five-day programme that was very intense. The workshop covered lots of different topics. These are all things that modern clay mineral experts need to know: from XRD and current challenges in clay mineral characterisation to stable isotopes and ways to measure them. Beside an offered intensive theoretical background many practical exercises were carried out. The laboratories were very well equipped, and the participants were able to learn and apply the latest methods for analysing clay minerals. There was also a social programme, with a poster session where people could try local Polish beer and a workshop dinner where they could try the best Galician food. This gave people plenty of chances to talk about their work and meet new people. The next workshop will be held in Krakow again in 2027. It is a good idea to sign up early, as more people want to come than there are places. The DTTG would like to thank Professor Derkowski and his team for their excellent organisation and the exciting contributions.  REYNOLDS-CUP 2024 The 2024 (12th) biennial Reynolds Cup competition on quantitative mineralogical analysis was closed on 14th March 2024. 120 people registered covering 34 countries. The samples prepared were nominally identified as a 1) A kaolin, 2) A bentonite, and 3) A sandstone. Deadline for submission of results was 31st May 2024 – due to some delays with shipping samples postponed to the 31st of October 2024. The anonymous summary was sent on 22nd of January 2025 to all participants who submitted results. The top three contestants with the most accurate results will be officially announced at the XVIII International Clay Conference (13 - 18 Jul 2025, Dublin, IE). The names of the others will remain strictly confidential. Reynolds Cup 2024 organisers |
| update: 24 Jun 2025 Web-Moderator M. Ploetze |