Menezesite from Cajati, São Paulo, Brazil: the first heteropolyniobate mineral - Atencio, Daniel; Coutinho, José Moacyr Vianna; Doriguetto, Antonio Carlos; Mascarenhas, Yvonne Primerano; Ellena, Javier; Ferrari, Viviane Carillo (General Meeting of then International Mineralogical Association, 2006)