Mineralogy Database

Boromullite Mineral Data

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General Boromullite Information

Help on Chemical  Formula: Chemical Formula: Al4.5SiB0.5O9.5
Help on Composition: Composition: Molecular Weight = 610.43 gm
   Magnesium   0.04 %  Mg    0.07 % MgO
   Aluminum   39.25 %  Al   74.16 % Al2O3
   Iron        0.27 %  Fe    0.35 % FeO
   Silicon     8.88 %  Si   19.00 % SiO2
   Boron       2.02 %  B     6.50 % B2O3
   Oxygen     49.54 %  O
             ______        ______ 
             100.00 %      100.08 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg0.01Fe2+0.03Al8.88Si1.93B1.14O18.9
Help on Environment: Environment: Formed during anatexis of B-rich pelitic rocks under granulite facies conditions. Structurally related to mullite.
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: Mount Stafford, Northern Territory, Australia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the boron analog to mullite.
Help on Synonym: Synonym: IMA2007-021