Kinoshitalite Mineral Data

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General Kinoshitalite Information

Chemical Formula:

(Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2

Composition:

Molecular Weight = 485.68 gm

Potassium 3.22 % K 3.88 % K₂O

Barium 16.96 % Ba 18.94 % BaO

Sodium 0.47 % Na 0.64 % Na₂O

Magnesium 10.51 % Mg 17.43 % MgO

Manganese 5.66 % Mn 7.30 % MnO

Aluminum 11.67 % Al 22.04 % Al₂O₃

Silicon 11.57 % Si 24.74 % SiO₂

Hydrogen 0.42 % H 3.71 % H₂O

Oxygen 39.53 % O

______ ______

100.00 % 98.68 % = TOTAL OXIDE

Empirical Formula:

Ba_0.6K_0.4Na_0.1Mg_2.1Mn²⁺_0.5Al_0.2Si₂Al_1.9O₁₀(OH)₂

Environment:

In hausmannite-tephroite ore.

IMA Status:

Approved IMA 1973

Locality:

In the Noda-Tanagawa mine, Iwate Prefeture, and at Hokkejino, Kyoto Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Dr. Kameki Kinshita (1896-1974), investigator of ore deposits in Japan.

Name Pronunciation:

Kinoshitalite + Pronunciation

Kinoshitalite Image

Images:

Kinoshitalite

Comments: Yellowish brown platy crystals of kinshitalite in granular matrix of grayish tephroite.
Location: Hokkejino, Kyoto Prefecture, Kinki Region, Honshu Island, Japan. Scale: See Image.
© Rruff Database

Kinoshitalite Crystallography

Axial Ratios:

a:b:c =0.5778:1:1.1081

Cell Dimensions:

a = 5.345, b = 9.25, c = 10.25, Z = 2; beta = 99.99° V = 499.09 Den(Calc)= 3.23

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.37(1), 2.02(0.55), 2.52(0.55),

Crystal Structure:

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Gnos E , Armbruster T , American Mineralogist , 85 (2000) p.242-250, Kinoshitalite, Ba(Mg)3(Al2Si2)O10(OH,F)2, a brittle mica from a manganese, deposit in Oman: Paragenesis and crystal chemistry

View Additional jPOWD Structure files for Kinoshitalite
[1] [2]

Physical Properties of Kinoshitalite

Cleavage:

{001} Perfect

Color:

Yellow brown, Colorless.

Density:

3.3

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Scaly - Morphology like fish scales.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Kinoshitalite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1945,KPDmeas= 0.1904,KC= 0.192
Ncalc = 1.62 - 1.63

Optical Data:

Biaxial (-), a=1.619, b=1.628-1.633, g=1.635, bire=0.0160, 2V(Calc)=40-82, 2V(Meas)=23.

Pleochroism (x):

very light yellow.

Pleochroism (y):

light brownish yellow.

Pleochroism (z):

light brownish yellow.

Calculated Properties of Kinoshitalite

Electron Density:

Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Kinoshitalite =3.30 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Kinoshitalite}= 73.64 barns/electron
U=PE_{Kinoshitalite} x r_electron= 233.45 barns/cc.

Radioactivity:

GRapi = 44.65 (Gamma Ray American Petroleum Institute Units)
Concentration of Kinoshitalite per GRapi unit = 2.24 (%)

Estimated Radioactivity from Kinoshitalite - barely detectable

Kinoshitalite Classification

Dana Class:

71.02.02c.05 (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 Kinoshitalite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

See Also:

Links to other databases for Kinoshitalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Kinoshitalite

(Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2
Dana No: 71.02.02c.05 Strunz No: 09.EC.35
Locality:

Notes: