Oxykinoshitalite Mineral Data

General Oxykinoshitalite Information

Chemical Formula:

(Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2

Composition:

Molecular Weight = 507.95 gm

Potassium 3.31 % K 3.99 % K₂O

Barium 12.98 % Ba 14.49 % BaO

Sodium 0.32 % Na 0.43 % Na₂O

Calcium 0.08 % Ca 0.11 % CaO

Magnesium 6.60 % Mg 10.95 % MgO

Titanium 7.26 % Ti 12.11 % TiO₂

Manganese 0.11 % Mn 0.14 % MnO

Aluminum 8.50 % Al 16.06 % Al₂O₃

Iron 9.79 % Fe 11.74 % FeO / 0.94 % Fe₂O₃

Silicon 13.05 % Si 27.92 % SiO₂

Hydrogen 0.06 % H 0.57 % H₂O

Oxygen 36.98 % O

Fluorine 0.97 % F 0.97 % F

- % F -0.41 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba_0.48K_0.43Na_0.07Ca_0.01Mg_1.38Fe²⁺_0.83Ti_0.77Fe³⁺_0.02Mn²⁺_0.01Si_2.36Al_1.6Fe³⁺_0.04 O_1.42O₁₀(OH)_0.32F_0.26

Environment:

Found in olivine nephelinite dominated by nepheline basalt flows with minor nephelinite dykes, tuffs, and breccias. Mica group

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Fernando-do-Noronha Island, Brazil Link to MinDat.org Location Data.

Name Origin:

Named in accord with the IMA-approved nomenclature for minerals of them mica group (Rieder et al. 1998, Can. Mineral., 36, 905-912).

Synonym:

IMA2004-013

Oxykinoshitalite Image

Images:

Oxykinoshitalite

Comments: Back-scattered-electron image of oxykinoshitalite, showing the prominent (001) cleavage, (CanMin, v43:1501).
Location: Fernando de Noronha Island, Pernambuco, Brazi. Scale: See Image.
© Canadian Mineralogist

Oxykinoshitalite Crystallography

Axial Ratios:

a:b:c =0.5765:1:1.0825

Cell Dimensions:

a = 5.3516, b = 9.2817, c = 10.0475, Z = 2; beta = 100.337° V = 490.98 Den(Calc)= 3.44

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/I_o): 2.637(1)(131), 2.172(0.9)(133), 3.13(0.7)(112.), 3.646(0.7)(112), 3.383(0.6)(002.), 1.547(0.5)(312.), 1.661(0.5)(135), 1.988(0.5)(133.), 2.435(0.5)(2

Physical Properties of Oxykinoshitalite

Cleavage:

{001} Perfect

Color:

Bright orange, Brown.

Density:

3.3

Diaphaneity:

Transparent

Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Oxykinoshitalite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2159,KC= 0.2159
Ncalc = 1.71 - 1.74

Optical Data:

Biaxial (+), a=1.708, b=1.71, g=1.719, bire=0.0110

Calculated Properties of Oxykinoshitalite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Oxykinoshitalite =3.30 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Oxykinoshitalite}= 59.78 barns/electron
U=PE_{Oxykinoshitalite} x r_electron= 189.00 barns/cc.

Radioactivity:

GRapi = 45.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Oxykinoshitalite per GRapi unit = 2.19 (%)

Estimated Radioactivity from Oxykinoshitalite - barely detectable

Oxykinoshitalite Classification

Dana Class:

71.02.02c.08 (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

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 Oxykinoshitalite Information

References:

NAME( AmMin, v91, p1205) PHYS. PROP.(AmMin, v91, p1205) OPTIC PROP.(AmMin, v91, p1205)

See Also:

Links to other databases for Oxykinoshitalite :
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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Oxykinoshitalite

(Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2
Dana No: 71.02.02c.08 Strunz No: 09.EC.35
Locality:

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