Two-Dimensional Honeycomb Materials (IMAGE) Rice University Caption Two-dimensional honeycomb materials like graphene (top) and chromium triiodide (bottom) feature a honeycomb structure of interconnected hexagons. In chromium triiodide, iodine atoms (pink) help align chromium atoms (blue) into a honeycomb pattern Credit Jae-Ho Chung/Korea University Usage Restrictions Credit must be used. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.