Classification of metals (IMAGE) University of Groningen Caption Metals can be classified according to their values of r0 and T*= A1/A2, where these coefficients follow simple trends shown in this plot. Credit Beatriz Noheda, University of Groningen Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.