AM_Alunogen
Formula: S3 Al2 O29 H34
Name: Alunogen
Unit cell: 7.42 26.97 6.062 89.67 97.34 91.53 , V=1202.74
Space group: P-1 (2)

Fang J H , Robinson P D , American Mineralogist , 61 (1976) p.311-317, Alunogen, Al2(H2O)12(SO4)3.5H2O: Its atomic arrangement and water content