Mineralogy Database

Ferrokinoshitalite Mineral Data

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General Ferrokinoshitalite Information

Help on Chemical  Formula: Chemical Formula: (Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ba0.5K0.4Fe2+2MgSi2.5Al1.5O10(OH)1.35F0.65
Help on Environment: 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.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Broken Hill mine, near Aggeneys, northern Cape Province, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name reflects the mineral�s iron content and relationship to kinoshitalite.
Help on Synonym: Synonym: IMA1999-026

Ferrokinoshitalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5771:1:1.0767
Help on Cell Dimensions: Cell Dimensions: a = 5.389, b = 9.337, c = 10.054, Z = 2; beta = 100.53° V = 497.37 Den(Calc)= 3.51
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.651(1)(131,200), 2.176(0.4)(133,202), 2.181(0.4), 1.551(0.3)(060m331), 1.529(0.25)(206), 1.659(0.25)(135,313

Physical Properties of Ferrokinoshitalite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Dark green.
Help on Density: Density: 3.69
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Ferrokinoshitalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1956,KPDmeas= 0.1861,KC= 0.1907
Ncalc = 1.67 - 1.7
Help on Optical Data: Optical Data: Biaxial (-), a=1.68, b=1.68, g=1.7, bire=0.0200, 2V(Calc)=0, 2V(Meas)=20. Dispersion Calculated.

Calculated Properties of Ferrokinoshitalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.54 gm/cc
note: Specific Gravity of Ferrokinoshitalite =3.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEFerrokinoshitalite = 62.21 barns/electron
U=PEFerrokinoshitalite x relectron= 219.92 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 41.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferrokinoshitalite per GRapi unit = 2.44 (%)

Estimated Radioactivity from Ferrokinoshitalite - barely detectable


Ferrokinoshitalite Classification

Help on  Dana Class: Dana Class: 71.02.02c.06 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02c)Mica Group (Margarite subgroup)
71.02.02c.01 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m
71.02.02c.02 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
71.02.02c.03 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
71.02.02c.04 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
71.02.02c.05 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
71.02.02c.06 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
71.02.02c.07 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
71.02.02c.08 Oxykinoshitalite! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EC.35 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
09.EC.35 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
09.EC.35 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
09.EC.35 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
09.EC.35 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
09.EC.35 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
09.EC.35 Oxykinoshitalite! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m

Other Ferrokinoshitalite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(AmMin, vol 85, p 1561) OPTIC PROP.(AmMin, vol 85, p 1561)
Help on See Also: See Also: Links to other databases for Ferrokinoshitalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Ferrokinoshitalite Specimen Label here :


(Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2
Dana No: 71.02.02c.06 Strunz No: 09.EC.35





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