A pleochroic light-sensitive variety containing 2.8% Cs2O and 1% Li2O.
Originally reported from Maxixe Mine, Piauí Valley, Taquaral, Itinga, Minas Gerais, Southeast Region, Brazil.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.