AM_Fluorophlogopite_2
Formula: (Si2.952 Al1.048) Mg3 K.76 Na.16 Ba.05 O10.7 (F1.3 H.7)
Name: Fluorophlogopite
Unit cell: 5.26 9.1 9.791 90.0 100.68 90.0 , V=460.54
Space group: C12/M1 (12)

Hazen R M , Finger L W , American Mineralogist , 63 (1978) p.293-296, The crystal structures and compressibilities of layer minerals at high, pressure. II. Phlogopite and chlorite, P = 35 kbar, sample is from Franklin, New Jersey, USA