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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, Locality: synthetic, Note: stuffed beta-quartz type structure |