AM_Montebrasite_15 Formula: P Al O4.55 F.45 H.55 Li Name: Montebrasite Unit cell: 6.6941 7.7204 6.9728 90.919 117.75 91.369 , V=318.67 Space group: C-1 (2)

Groat L A , Chakoumakos B C , Brouwer D H , Hoffman C M , Fyfe C A , Morell H , Schultz A J , American Mineralogist , 88 (2003) p.195-210, The amblygonite (LiAlPO4F) - montebrasite (LiAlPO4OH) solid solution:, A combined powder and single-crystal neutron diffraction and solid-state Li MAS, CP MAS,, and REDOR NMR study, Sample: from Tanco Pegmatite, Bernic Lake, Manitoba at T = 295 K, Note: O3-x coordinate modified