Koechlinite Mineral Data

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General Koechlinite Information

Chemical Formula:

Bi2MoO6

Composition:

Molecular Weight = 609.90 gm

Bismuth 68.53 % Bi 76.40 % Bi₂O₃

Molybdenum 15.73 % Mo 23.60 % MoO₃

Oxygen 15.74 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi₂MoO₆

Environment:

In cavities in vein material composed of quartz, bismuth, and smaltite.

IMA Status:

Valid Species (Pre-IMA) 1914

Locality:

Daniel mine, Schneeberg, Sazony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Rudolf Koechlin (1862-1939), Austrian mineralogist.

Name Pronunciation:

Koechlinite + Pronunciation

Synonym:

ICSD 17070

PDF 21-102

Koechlinite Image

Images:

Koechlinite

Comments: Greenish yellow crystal of koechlinite on quartz.
Location: Adam Heber Mine, Neustädtel, Schneeberg district, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Koechlinite Crystallography

Axial Ratios:

a:b:c =0.3393:1:0.3381

Cell Dimensions:

a = 5.502, b = 16.213, c = 5.483, Z = 4; V = 489.11 Den(Calc)= 8.28

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mca

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

By Intensity(I/I_o): 3.15(1), 1.652(0.2), 2.741(0.18),

Forms:

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Forms: ( 0 1 0) ( 0 2 1) ( 1 3 1) ( 0 0 1)

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Crystal Structure:

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Teller R G , Brazdil J F , Grasselli R K , Jorgensen J D , Acta Crystallographica, Section C , 40 (1984) p.2001-2005, The structure of gamma-bismuth molybdate, Bi2MoO6, by powder neutron diffraction, Locality: synthetic

Physical Properties of Koechlinite

Cleavage:

{010} Perfect

Color:

Greenish yellow, Yellow, White.

Density:

8.26

Diaphaneity:

Transparent

Fracture:

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

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Koechlinite

Gladstone-Dale:

CI meas= -0.121 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1932,KPDmeas= 0.1937,KC= 0.1728
Ncalc = 2.43

Optical Data:

Biaxial (-), a=2.52, b=2.61, g=2.67, bire=0.1500, 2V(Calc)=76, 2V(Meas)=large. Dispersion r < v strong.

Calculated Properties of Koechlinite

Electron Density:

Bulk Density (Electron Density)=6.95 gm/cc
note: Specific Gravity of Koechlinite =8.28 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Koechlinite=1,342.38 barns/electron
U=PE_Koechlinite x rElectron Density=9,330.81 barns/cc.

Radioactivity:

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

Koechlinite Classification

Dana Class:

48.02.02.01 (48)Anhydrous Molybdates and Tungstates

(48.02)where (A)2 XO4

(48.02.02)Dana Group

48.02.02.01 Koechlinite Bi2MoO6 C mca 2/m 2/m 2/m

Strunz Class:

04.DE.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DE -With medium-sized cations; with various polyhedra

04.DE.15 Koechlinite Bi2MoO6 C mca 2/m 2/m 2/m

04.DE.15 Russellite Bi2WO6 P ca2₁ mm2

04.DE.15 Tungstibite Sb2O3•WO3 P 22121 2 2 2

Other Koechlinite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Koechlinite :
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 Koechlinite Specimen Label here :

Koechlinite

Bi2MoO6
Dana No: 48.02.02.01 Strunz No: 04.DE.15
Locality:

Notes: