AM_Montebrasite_6 Formula: P Al O4.96 F.04 H.96 Li Name: Montebrasite Unit cell: 6.7114 7.7048 7.0187 91.32 117.949 91.784 , V=320.16 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 Dunton Gem Min, Oxford County, Maine at T = 15 K