AM_Heulandite-Sr_2 Formula: Sr2.079 (Si13.5 Al4.5) O45.29 H34 Name: Heulandite-Sr Unit cell: 17.643 17.842 7.418 90.0 116.851 90.0 , V=2083.33 Space group: C1M1 (8)

Dobelin N , Armbruster T , American Mineralogist , 88 (2003) p.527-533, Stepwise dehydration of Sr-exchanged heulandite:, A single-crystal X-ray study, Note: dehydrated at 150 deg C, measured at -170 deg C