AM_Barrerite
Formula: Na1.981 K.797 Mg.069 Ca.492 (Si13.842 Al4.158) O45.6 H46
Name: Barrerite
Unit cell: 13.6336 18.2056 17.8445 90.0 90.0 90.0 , V=4429.15
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-A, T = 339 K