Citation: Brigatti, M. F.; Medici, L.; Poppi, L.; Vaccaro, C. (2001). Crystal chemistry of trioctahedral micas - 1M from the Alto Paranaiba Igneous Province, Southeastern Brazil Sample: Taa11-1A, ferroan T-O3 given as 1.663, but I compute 1.647. The Canadian Mineralogist, 39, pp. 1333-1345.