Citation: Xu, H.; Heaney, P. J.; Beall, G. H. (2000). Phase transitions induced by solid solution in stuffed derivatives of quartz: A powder synchrotron XRD study of the LiAlSiO4-SiO2 join Sample: x=.69, Li.31Al.31Si1.69O4, alpha quartz structure. American Mineralogist, 85, pp. 971-979.