Mineralogy Database

Bariumbannisterite Mineral Data

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General Bariumbannisterite Information

Help on Chemical  Formula: Chemical Formula: (K,H3O)(Ba,Ca)(Mn++,Fe++,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O)
Help on Composition: Composition: Molecular Weight = 3,648.84 gm
   Potassium   0.80 %  K     0.97 % K2O
   Barium      2.82 %  Ba    3.15 % BaO
   Calcium     0.27 %  Ca    0.38 % CaO
   Magnesium   2.00 %  Mg    3.31 % MgO
   Manganese  21.08 %  Mn   27.22 % MnO
   Aluminum    2.96 %  Al    5.59 % Al2O3
   Iron        6.12 %  Fe    7.88 % FeO
   Silicon    21.55 %  Si   46.11 % SiO2
   Hydrogen    0.19 %  H     1.67 % H2O
   Oxygen     42.20 %  O
             ______        ______ 
             100.00 %       96.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75(H3O)0.25Ba0.75Ca0.25Mn2+14Fe2+4Mg3Si28Al4O90(OH)6
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the barium analog of bannisterite.
Help on Synonym: Synonym: Bannisterite - Barium rich