AM_Li31Al31Si169O4 Formula: Li.155 (Si.845 Al.155) O2 Name: Li.31Al.31Si1.69O4 Unit cell: 5.0865 5.0865 5.4451 90.0 90.0 120.0 , V=122.00 Space group: P3221 (154)

Xu H , Heaney P J , Beall G H , American Mineralogist , 85 (2000) p.971-979, 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