Ferrokinoshitalite Mineral Data

General Ferrokinoshitalite Information
Chemical Formula:	(Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2
Composition:	Molecular Weight = 526.29 gm
	Potassium 2.97 % K 3.58 % K₂O
	Barium 13.05 % Ba 14.57 % BaO
	Magnesium 4.62 % Mg 7.66 % MgO
	Aluminum 7.69 % Al 14.53 % Al₂O₃
	Iron 21.22 % Fe 27.30 % FeO
	Silicon 13.34 % Si 28.54 % SiO₂
	Hydrogen 0.26 % H 2.31 % H₂O
	Oxygen 34.50 % O
	Fluorine 2.35 % F 2.35 % F
	- % F -0.99 % -O=F₂
	______ ______
	100.00 % 99.85 % = TOTAL OXIDE
Empirical Formula:	Ba_0.5K_0.4Fe²⁺₂MgSi_2.5Al_1.5O₁₀(OH)_1.35F_0.65
Environment:	Found in metamorphosed exhalative sedimentary rocks (banded iron-formations) enclosing the massive Pb-Zn-Cu-Ag sulfide orebodies. The polytype in the type material is 1M. A member o f the Brittle Mica group.
IMA Status:	Approved IMA 1999 (Dana # Added)
Locality:	Broken Hill mine, near Aggeneys, northern Cape Province, South Africa. Link to MinDat.org Location Data.
Name Origin:	The name reflects the mineral�s iron content and relationship to kinoshitalite.
Synonym:	IMA1999-026