AM_Montebrasite_5 Formula: P Al O4 F Li Name: Montebrasite Unit cell: 6.644 7.744 6.91 90.35 117.33 91.01 , V=315.75 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 M6116