Physicochemical or geochemical

• Damby, D. E., Llewellin, E. W., Horwell, C. J., Williamson, B. J., Najorka, J., Cressey, G., Carpenter, M. A., (2014), The α-β phase transition in volcanic cristobalite, Journal of Applied Crystallography, 47, 1205-1215, 10.1107/S160057671401070X