AM_Na5H5AlSi206 Formula: Na.167 H.167 (Al.333 Si.667) O2 Name: Na.5H.5AlSi206 Unit cell: 5.15 5.15 5.458 90.0 90.0 120.0 , V=125.37 Space group: P6222 (180)

Muller G , Paulus H , Stiefel J , Neues Jahrbuch fur Mineralogie, Monatshefte , 1990 (1990) p.493-503, Synthesis and structure of beta-quartz type, Na0.5H0.5AlSi206 as compared to LiAlSi206, Note: stuffed beta-quartz type structure, Sample: ref 2