AM_Phengite
Formula: K2 Al2.798 Mg.63 Si3.572 O12 H2
Name: Phengite
Unit cell: 5.23169 5.23169 30.1227 90.0 90.0 120.0 , V=714.02
Space group: P3112 (151)

Pavese A , Ferraris G , Prencipe M , Ibberson R , European Journal of Mineralogy , 9 (1997) p.1183-1190, Cation site ordering in phengite 3T from the Dora-Maira, massif (western Alps): a variable-temperature neutron, powder diffraction study, Note: at T = 893 K, Locality: Dora-Maira massif, western Alps