Mineralogy Database

Manganoneptunite Mineral Data

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General Manganoneptunite Information

Help on Chemical  Formula: Chemical Formula: KNa2Li(Mn,Fe++)2Ti2Si8O24
Help on Composition: Composition: Molecular Weight = 906.78 gm
   Potassium   4.31 %  K     5.19 % K2O
   Sodium      5.07 %  Na    6.84 % Na2O
   Lithium     0.77 %  Li    1.65 % Li2O
   Titanium   10.56 %  Ti   17.62 % TiO2
   Manganese   9.09 %  Mn   11.73 % MnO
   Iron        3.08 %  Fe    3.96 % FeO
   Silicon    24.78 %  Si   53.01 % SiO2
   Oxygen     42.35 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KNa2LiMn2+1.5Fe2+0.5Ti2Si8O24
Help on Environment: Environment: Found in syenites and syenite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1923
Help on Locality: Locality: Lovozero Massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and relationship to neptunite.
Help on Synonym: Synonym: Mangan-neptunite - Renamed as Manganoneptunite by Mineralogical Record, v330 (2008), p131