AM_Ungarettiite_1 Formula: O24 Si8 Mn4.71 Mg.29 Na2.77 Ca.03 K.152 Name: Ungarettiite Unit cell: 9.893 18.041 5.295 90.0 105.1 90.0 , V=912.42 Space group: C12/M1 (12)

Hawthorne F C , Oberti R , Cannillo E , Sardone N , Zanetti A , Grice J D , Ashley P M , American Mineralogist , 80 (1995) p.165-172, A new anhydrous amphibole from the Hoskins mine, Grenfell, New South Wales,, Australia: Description and crystal structure of ungarettiite,, NaNa2(Mn2Mn3)Si8O22O2, Sample U2