Structure of the Atacamite Spongin (IMAGE) University of Freiberg / TU Bergakademie Freiberg Caption Under the digital light microscope, Dr. Iarsolav Petrenko examines the structure of the atacamite spongin. Credit TU Bergakademie Freiberg Usage Restrictions None 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.