Dear Colleagues, The Clay Science Society (Turkey) and The Clay Minerals Society (USA) have the great pleasure to announce co-hosting of the 17th International Clay Conference 2021 in Istanbul, Turkey July 12-16, 2021 (icc.aipea.org). Proposals are invited for Thematic Sessions. To propose a Thematic Session, please send an e-mail with “Thematic Session ICC 2021” in the subject line and include the following information: (1) Title, a short description of the thematic section, potential journal(s) for paper publication, and keywords (max. 150 words), (2) Name(s), Title, afilliation, and contact information of the organizers with a brief academic CV and statement of syngestic activities leading to the rationale and enthusiasm for the proposed theme. The Scientific Committee will assess and select proposals relevant to the Conference theme “NEW INTERFACES: BRIDGING CONTINENTS AND CULTURES WITH CLAYS.” The deadline for the submission of thematic session proposals is July 31, 2020. The scientific committee will review the proposals and announce the decisions on September 2020. Please submit your proposal to the ICC chairs e-mail (chair@17icc.org<mailto:chair@17icc.org>) on the conference homepage: icc.aipea.org. Following the announcement of the sessions, abstracts can be submitted within each of the thematic sessions. The call for abstract submission will open October 15, 2020. Note: Thematic Session Organiser(s) must attend the 17th ICC and will serve as the Chair for their Thematic Session and help for student judgement. All Thematic Session will be required to pay their 17th ICC registration fees. The conference organizers do not have financial resources to waive fees. Please, help us on by spreading this call in your network and among your colleagues! Kind regards, Prof. Dr. Selahattin Kadir Conference General Chair Eskişehir Osmangazi University, Eskişehir, Turkey Prof. Dr. Paul A. Schroeder Conference Co-Chair University of Georgia, Athens, GA, United States Prof. Dr. Asuman G. Türkmenoglu AIPEA Conference Representative Middle East Technical University, Ankara, Turkey