Mineralogy Database

Ominelite Mineral Data

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General Ominelite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg)Al3BSiO9
Help on Composition: Composition: Molecular Weight = 316.53 gm
   Magnesium   0.77 %  Mg    1.27 % MgO
   Aluminum   25.57 %  Al   48.32 % Al2O3
   Iron       15.88 %  Fe   20.43 % FeO
   Silicon     8.87 %  Si   18.98 % SiO2
   Boron       3.42 %  B    11.00 % B2O3
   Oxygen     45.49 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.9Mg0.1Al3BSiO9
Help on Environment: Environment: Accessory mineral found in a high alumina porphyritic granite of Miocene age associated with sekaninaite (Fe cordierite). Fe 2+ -analogue of grandidierite.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Omine Mountains near the misen River at Tenkawa, Yoshio, Nara Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: IMA1999-025