AM_Li67Al67Si133O4 Formula: Li.33 (Si.67 Al.33) O2 Name: Li.67Al.67Si1.33O4 Unit cell: 5.2102 5.2102 5.4551 90.0 90.0 120.0 , V=128.25 Space group: P6222 (180)

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=.33, Li.67Al.67Si1.33O4, beta quartz structure