AM_Montesommaite Formula: K (Al.58 Si1.42) O6.25 H.668 Name: Montesommaite Unit cell: 7.141 7.141 17.307 90.0 90.0 90.0 , V=882.55 Space group: I41/AMD (141)

Rouse R C , Dunn P J , Grice J D , Schlenker J L , Higgins J B , American Mineralogist , 75 (1990) p.1415-1420, Montesommaite, (K,Na)9Al9Si23O64.10H2O, a new zeolite related to merlinoite and, the gismondine group