Citation: Groat, L.A.; Chakoumakos, B.C.; Brouwer, D.H.; Hoffman, C.M.; Schultz, A.J.; Fyfe, C.A.; Morell, H. (2003). The amblygonite (Li Al P O4 F) - montebrasite (Li Al P O4 (O H)) solid solution: a combined powder and single-crystal neutron diffraction and solid-state (6)Li MAS, CP MAS and REDOR NMR study. American Mineralogist, 88, pp. 195-210.