Komkovite Mineral Data

Komkovite Mineral Data +

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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)

IMA Status:

Approved IMA 1990

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 39541

IMA1988-032

PDF 42-1398

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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 - TrapezohedralH-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),

Crystal Structure:

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Sokolova E V , Araktscheeva A V , Voloshin A V , Doklady Akademii Nauk SSSR , 320 (1991) p.1384-1388, Crystal structure of komkovite

Physical Properties of Komkovite

Cleavage:

None

Color:

Brown.

Density:

3.31

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Komkovite

Electron Density:

r_electron=3.11 gm/cc
note: r_Komkovite=3.31 gm/cc.

Fermion Index

Fermion Index = 0.07582
Boson Index = 0.92418

Photoelectric:

PE_Komkovite= 139.81 barns/electron
U=PE_Komkovite x r_electron= 434.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Komkovite is Not Radioactive

Komkovite Classification

Dana Class:

59.2.4.1 (59)Cyclosilicate Three-Membered Rings

(59.2)hydrated

(59.2.4)Dana Group

59.2.4.1 Komkovite BaZrSi3O9·3(H2O) R 32 3 2

Strunz Class:

VIII/E.04-50 VIII - Silicates

VIII/E - Cyklosilicates, triplet rings [Si3O9]6-

VIII/E.04 - Catapleiite - Komkovite series

VIII/E.04-10 Catapleiite (Na,Ca,[])2ZrSi3O9·2(H2O) B2/b (pseudo-HEX) 2/m

VIII/E.04-30 Gaidonnayite Na2ZrSi3O9·2(H2O) P 2₁nb mm2

VIII/E.04-40 Georgechaoite KNaZrSi3O9·2(H2O) P 2₁nb mm2

VIII/E.04-50 Komkovite BaZrSi3O9·3(H2O) R 32 3 2

Other Komkovite Information

References:

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

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Komkovite

BaZrSi3O9·3(H2O)
Dana No: 59.2.4.1 Strunz No: VIII/E.04-50
Locality:

Notes: