Figure 2 (IMAGE) Tohoku University Caption Ring shape indicators: (a) Computation procedure, (b) Examples of indicators on Silica (SiO2), (c) Distribution of shape indicators in silica glass and nine crystals. Credit Motoki Shiga et al. Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.