Andrade, MBAtencio, DMenezes Filho, LADSpratt, J2018-05-232018-05-232018-02-282018-05-22Andrade, M., Atencio, D., Menezes Filho, L., & Spratt, J. (2018). Melcherite, trigonal Ba2Na2Mg[Nb6O19]·6H2O, the second natural hexaniobate, from Cajati, São Paulo, Brazil: Description and crystal structure. Mineralogical Magazine, 82(1), 111-120. doi:10.1180/minmag.2017.081.0260026-461X10.1180/minmag.2017.081.026http://hdl.handle.net/10141/6223600000-0002-6395-8895restrictedAccessMelcherite, trigonal Ba2Na2Mg[Nb6O19]·6H2O, the second natural hexaniobate, from Cajati, São Paulo, Brazil: Description and crystal structureJournal Article1471-8022Mineralogical Magazine8201111 - 120melcheritenew mineralhexaniobatecrystal structurechemical compositionJacupiranga mineCajatiBrazil