Komkovite Mineral Data

General Komkovite Information

Chemical Formula:

BaZrSi3O9•3(H2O)

Composition:

Molecular Weight = 510.85 gm

Barium 26.88 % Ba 30.01 % BaO

Zirconium 17.86 % Zr 24.12 % ZrO₂

Silicon 16.49 % Si 35.29 % SiO₂

Hydrogen 1.18 % H 10.58 % H₂O

Oxygen 37.58 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaZrSi₃O₉•3(H₂O)

Environment:

Apparently altering from catapleiite, in dolomitic veinlets cutting metasomatically altered pyroxenites, in a carbonatite.

IMA Status:

Approved IMA 1990

Locality:

In the Vuoriyarvi carbonatite complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Aleksandr Ivanovich Komkov (1926-1987), Russian mineralogist and crystallographer, Karpinskii All-Union Research Institute of Geology, St. Petersburg, Russia.

Name Pronunciation:

Komkovite + Pronunciation

Synonym:

ICSD 39541

IMA1988-032

PDF 42-1398

Komkovite Crystallography

Axial Ratios:

a:c = 1:1.49496

Cell Dimensions:

a = 10.526, c = 15.736, Z = 6; V = 1,509.91 Den(Calc)= 3.37

Crystal System:

Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: R 32

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

By Intensity(I/I_o): 5.23(1), 2.96(0.9), 3.59(0.8),

Physical Properties of Komkovite

Cleavage:

None

Color:

Brown.

Density:

3.31

Diaphaneity:

Translucent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

light brown

Optical Properties of Komkovite

Gladstone-Dale:

CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1951,KPDmeas= 0.1986,KC= 0.1987
Ncalc = 1.66 - 1.67

Optical Data:

Uniaxial (-), e=1.644, w=1.671, bire=0.0270.

Calculated Properties of Komkovite

Electron Density:

Bulk Density (Electron Density)=3.11 gm/cc
note: Specific Gravity of Komkovite =3.31 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Komkovite= 139.81 barns/electron
U=PE_Komkovite x rElectron Density= 434.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Komkovite is Not Radioactive

Komkovite Classification

Dana Class:

59.02.04.01 (59)Cyclosilicate Three-Membered Rings

(59.02)hydrated

(59.02.04)Dana Group

59.02.04.01 Komkovite BaZrSi3O9•3(H2O) R 32 3 2

Strunz Class:

09.DM.10 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DM -Inosilicates with 6-periodic single chains

09.DM.10 Calciohilairite CaZrSi3O9•3(H2O) R 32 3 2

09.DM.10 Hilairite Na2ZrSi3O9•3(H2O) R 3m 3 2/m

09.DM.10 Komkovite BaZrSi3O9•3(H2O) R 32 3 2

09.DM.10 Pyatenkoite-(Y)! Na5(Y,Dy,Gd)TiSi6O18•6(H2O) R 32 3 2

09.DM.10 Sazykinaite-(Y) Na5YZrSi6018•6(H2O) R 32 3 2

Other Komkovite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.77,p207,1992) OPTIC PROP.(Am.Min.,Vol.77,p207,1992)

See Also:

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

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

Komkovite

BaZrSi3O9•3(H2O)
Dana No: 59.02.04.01 Strunz No: 09.DM.10
Locality:

Notes:

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