Superlattice (image) University of Pennsylvania Caption Lattice image for a grain in which both chessboard and diamond contrast are apparent. Superlattice periodicity is approximately 10 nm. Credit University of Pennsylvania Usage Restrictions None 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.