Welcome to the German-Swiss-Austrian Clay Group
The DTTG is an association of clay researchers and clay users, mainly from Germany, Austria and Switzerland. It was founded on 28 March 1972 in Kiel from the former "Working Group on Clay Minerals" (Arbeitsgemeinschaft Tonminerale) funded by the DFG (German Research Foundation) and is an association registered in Germany under the name "Deutsche Ton- und Tonmineralgruppe".
Latest News
MECC 2026: Call for Sessions started
15.12.2025
The DTTG is pleased to announce the 12th Mid-European-Clay Conference (MECC 2026) to be held at ETH Zurich, Campus Zentral, from 06 to 11 September 2026. The conference will be …
Read more...It's clay! - German Rock of the Year 2025
05.08.2025
The Board of Trustees of the Bundesverband Deutscher Geowissenschafler e.V. (Professional Association of German Geoscientists) has decided to name clay "Rock of the Year 2025". From the DTTG's point of …
Read more...Looking back at the 11th DTTG Workshop in Krakow
05.08.2025This year's 11th DTTG International Workshop ‘Qualitative and Quantitative Analysis of Clays and Clay Minerals’ took place in the beautiful and historic city of Krakow, Poland. The event was organised …
New DTTG website
05.08.2025The DTTG website now has a new and more modern design. After Dr Michael Plötze passed the baton of webmaster to Dr Markus Peltz last year, he immediately began work …
Review of the Mid European Clay Conference 2024 in Pilsen
05.08.2025The Mid European Clay Conference (MECC) took place in Pilsen from 16.09. - 20.09.2024. Despite some cancellations due to floods, a dense, high-quality programme was put together. With 18 participants, …
Announcements
12.12.2025
Reynolds Cup registration open now!
Registration for the 13th biennial Reynolds Cup is now open. The Reynolds Cup is a competition for the quantitative determination of samples of known composition …
28.10.2025
Profex 5.6.0 released
A new version of the Rietveld refinement software Profex was just released. Many new features are waiting to be tried out.
For more information check …
05.08.2025
MECC 2026 in Zurich
The DTTG is pleased to announce that the next Mid-European Clay Conference will take place in 2026 under the direction of Dr Michael Plötze at …