Manganoeudialyte is an moderately rare mineral of the eudialyte group,Mindat, Manganoeudialyte, http://www.mindat.org/min-39640.html with formula Na14Ca6Mn3Zr3Si2[Si24O72(OH)2]Cl2·4H2O. The formula given is one of the forms that can be given, based on the originally reported one, and shows dominance of silicon at both the M3 and M4 sites. As suggested by its name, it is the manganese-analogue of eudialyte.Nomura, S.F., Atencio, D., Chukanov, N.V., Rastsvetaeva, R.K., Coutinho, J.M.V., and Karipidis, T.K., 2010: Manganoeudialyte – a new mineral from Poços de Caldas, Minas Gerais, Brasil. Zapisko RMO 4Handbook of Mineralogy, Manganoeudialyte, http://www.handbookofmineralogy.org/pdfs/manganoeudialyte.pdf
Occurrence and association Manganoeudialyte was discovered in khibinites of the Poços de Caldas massif, Brazil. Associated minerals are aegirine, analcime, astrophyllite, cancrinite, fluorite, lamprophyllite, nepheline, potassium feldspar, rinkite, sodalite, and titanite.
Notes on chemistry Impurities in manganoeudialyte include strontium, potassium, niobium, aluminium, fluorine, and minor hafnium, cerium, and lanthanum.
References
External links The Nomenclature of the Eudialyte-group minerals