Citation: Ivaldi, G.; Ferraris, G.; Curetti, N.; Compagnoni, R. (2001). Coexisting 3T and 2M_1 polytypes of phengite from Cima Pal (Val Savenca, western Alps): Chemical and polytypic zoning and structural characterisation Sample: 2M1G Locality: Cima Pal, Val Savenca, western Alps. European Journal of Mineralogy, 13, pp. 1025-1034.