Citation: Palmer, D. C.; Dove, M. T.; Ibberson, R. M.; Powell, B. M. (1997). Structural behavior, crystal chemistry and phase transitions in substituted leucites: High-resolution neutron powder diffraction studies Sample: Natural, Expt. no. 3003, T = 298 K, KAlSi2O6. American Mineralogist, 82, pp. 16-29.