AM_Montebrasite_1 Formula: P Al O4.911 F.089 Li H.911 Name: Montebrasite Unit cell: 6.713 7.711 7.0102 91.22 117.91 91.67 , V=320.28 Space group: C-1 (2)

Groat L A , Raudsepp M , Hawthorne F C , Ercit T S , Sherriff B L , Hartman J S , American Mineralogist , 75 (1990) p.992-1008, The amblygonite-montebrasite series: Characterization by single-crystal, structure refinement, infrared spectroscopy and multinuclear MAS-NMR, spectroscopy, sample AF-43