AM_Fluorapophyllite_3
Formula: F K Ca4 Si8 O26.88 H13.76
Name: Fluorapophyllite
Unit cell: 8.9639 8.9639 15.754 90.0 90.0 90.0 , V=1265.86
Space group: P4/MNC (128)

Stahl K , European Journal of Mineralogy , 5 (1993) p.845-849, A neutron powder diffraction study of partially dehydrated, fluorapophyllite, KCa4Si8O20F*6.9H2O