AM_Heulandite-Sr_1 Formula: Sr2.094 (Si13.5 Al4.5) O48.49 H34 Name: Heulandite-Sr Unit cell: 17.698 17.97 7.426 90.0 116.653 90.0 , V=2110.76 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 100 deg C, measured at -170 deg C