AM_Barrerite_2 Formula: Na1.975 K.792 Mg.07 Ca.498 Si13.842 Al4.158 O37.85 H12.5 Name: Barrerite Unit cell: 13.5502 17.1487 16.0919 90.0 90.0 90.0 , V=3739.25 Space group: AMMA (63)

Ori S , Mazzucato E , Vezzalini G , American Mineralogist , 94 (2009) p.64-73, Dehydration dynamics of barrerite: An in situ synchrotron XRPD study, Locality: Kuiu Island, Alaska, Note: BAR-B, T = 637 K