Citation: Atencio, D.; Contreira, R. R.; Mills, S. J.; Coutinho, J. M. V.; Honorato, S. B.; Ayala, A. P.; Ellena, J.; De Andrade, M. B. (2011). Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: Crystal chemistry and Rietveld refinement Note: Identification of OH not reported. American Mineralogist, 96, pp. 1455-1460.