Ominelite Mineral Data

General Ominelite Information
Chemical Formula:	(Fe++,Mg)Al3BSiO9
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
Empirical Formula:	Fe²⁺_0.9Mg_0.1Al₃BSiO₉
Environment:	Accessory mineral found in a high alumina porphyritic granite of Miocene age associated with sekaninaite (Fe cordierite). Fe 2+ -analogue of grandidierite.
IMA Status:	Approved IMA 2002 (Dana # Added)
Locality:	Omine Mountains near the misen River at Tenkawa, Yoshio, Nara Prefecture, Japan. Link to MinDat.org Location Data.
Name Origin:	Named after the locality.
Synonym:	IMA1999-025