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⇱ Koechlinite: Mineral information, data and localities.

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Koechlinite

A valid IMA mineral species - grandfathered
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About KoechliniteHide

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Formula:
Bi2MoO6
Colour:
Greenish yellow, white to light gray; greenish yellow in transmitted light
Lustre:
Silky
Specific Gravity:
8.26 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in 1914 by Waldemar Theodore Schaller in honor of Rudolf Ignatz Koechlin [November 11, 1862 Wien, Austria - February 11, 1939 Wien, Austria], Austrian mineralogist and Curator of the mineral collection of the Vienna Natural History Museum (former Hof-Museum), Vienna, Austria.
A rare secondary mineral occurring in the oxidation zones of Bi-Mo deposits.

The molybdate analogue of russellite.


Unique IdentifiersHide

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Mindat ID:
2235
Long-form identifier:
mindat:1:1:2235:0

IMA Classification of KoechliniteHide

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Approved, 'Grandfathered' (first described prior to 1959)
First published:
1914

Classification of KoechliniteHide

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4.DE.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
48.2.2.1

48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
2 : A2XO4
27.3.4

27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KclIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KoechliniteHide

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Silky
Transparency:
Transparent
Colour:
Greenish yellow, white to light gray; greenish yellow in transmitted light
Streak:
Pale greenish yellow
Tenacity:
Very brittle
Cleavage:
Perfect
On {010}, perfect on {0kl}, imperfect.
Density:
8.26 g/cm3 (Calculated)

Optical Data of KoechliniteHide

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Type:
Biaxial (-)
RI values:
nα = 2.52 nβ = 2.61 nγ = 2.67
Max. Birefringence:
δ = 0.150
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate
Dispersion:
none
Pleochroism:
Weak
Comments:
In shades of greenish yellow.
Comments:
2V measured = large.

Chemistry of KoechliniteHide

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Mindat Formula:
Bi2MoO6
Element Weights:
Element% weight
Bi68.528 %
O15.739 %
Mo15.733 %

Calculated from ideal end-member formula.

Crystallography of KoechliniteHide

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Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pna21
Cell Parameters:
a = 5.4822 Å, b = 16.1986 Å, c = 5.5091 Å
Ratio:
a:b:c = 0.338 : 1 : 0.34
Unit Cell V:
489.23 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals thin, square to rectangular plates striated parallel [010] and laths flattened on {010}; spheroidal aggregates of laths; massive or earthy incrustations.
Twinning:
{101} as twin plane, penetration and contact twins. Composition face {101} or {010} in contact twins.
Comment:
Pseudotetragonal; space group based on synthetic material.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009999KoechliniteTeller R G, Brazdil J F, Grasselli R K, Jorgensen J D (1984) The structure of gamma-bismuth molybdate, Bi2MoO6, by powder neutron diffraction Acta Crystallographica C40 2001-2005👁 Image
1984synthetic0293
CIF Raw Data - click here to close
Epitaxy Comments:
Parallel growths with an unidentified orthorhombic mineral reported.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
3.131 Å(100)
1.647 Å(90)
1.918 Å(80)
1.628 Å(70)
2.733 Å(60)
1.936 Å(60)
1.570 Å(60)

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of KoechliniteHide

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Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts: #64801. U.S. National Museum of Natural History, Washington, D.C., USA: #R6411, 93646.

Other Language Names for KoechliniteHide

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German:Koechlinit
Simplified Chinese:钼铋矿
Spanish:Koechlinita
Traditional Chinese:鉬鉍礦

Relationship of Koechlinite to other SpeciesHide

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Other Members of Koechlinite Group:
RusselliteBi2WO6Orth. mm2 : Pca21
TungstibiteSb3+2WO6Orth. 222

Common AssociatesHide

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Associated Minerals Based on Photo Data:
11 photos of Koechlinite associated with BismuthiniteBi2S3
8 photos of Koechlinite associated with QuartzSiO2
5 photos of Koechlinite associated with Bismutite(BiO)2CO3
2 photos of Koechlinite associated with AnglesitePbSO4
2 photos of Koechlinite associated with MolybdeniteMoS2
2 photos of Koechlinite associated with CovelliteCuS
2 photos of Koechlinite associated with RusselliteBi2WO6
2 photos of Koechlinite associated with Native BismuthBi
2 photos of Koechlinite associated with Wolframite Group
2 photos of Koechlinite associated with MuscoviteKAl2(AlSi3O10)(OH)2

Related Minerals - Strunz-mindat GroupingHide

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4.DE.ColchesteriteBi3+2Mo6+2O9Mon. 2/m
4.DE.PertolditeGeO2Trig. 32
4.DE.ZiroiteZrO2Tet. 4/mmm(4/m2/m2/m) : P42/nmc
4.DE.05DowneyiteSeO2Tet. 4/mmm(4/m2/m2/m) : P42/mbc
4.DE.10Koragoite(Mn2+,Fe3+)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20Mon. 2 : P21
4.DE.15RusselliteBi2WO6Orth. mm2 : Pca21
4.DE.15TungstibiteSb3+2WO6Orth. 222
4.DE.20TelluriteTeO2Orth. mmm(2/m2/m2/m) : Pbca
4.DE.25ParatelluriteTeO2Tet. 422
4.DE.30BismutotantaliteBiTaO4Orth.
4.DE.30StibiotantaliteSb(Ta,Nb)O4Orth. mm2
4.DE.30CervantiteSb3+Sb5+O4Orth. mm2
4.DE.30BismutocolumbiteBi(Nb,Ta)O4Orth. mmm(2/m2/m2/m)
4.DE.30StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
4.DE.30ClinocervantiteSb3+Sb5+O4Mon. 2/m : B2/b
4.DE.35BaddeleyiteZrO2Mon. 2/m : P21/b
4.DE.40BillwiseiteSb3+5Nb3WO18Mon. 2/m : B2/m
4.DE.45KyawthuiteBi3+Sb5+O4Mon. 2/m

Other InformationHide

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Notes:
Readily soluble in HCl, less so in HNO3.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KoechliniteHide

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mindat.org URL:
https://www.mindat.org/min-2235.html
Please feel free to link to this page.

References for KoechliniteHide

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Reference List:

Localities for KoechliniteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
  • New South Wales
    • Bourke Co.
      • Ardlethan
Palache et al. (1951)
    • Gough Co.
      • Elsmore
Rankin et al. (2002) +1 other reference
      • Kingsgate
Sharpe et al. (2004)
Clissold (2007)
  • Northern Territory
    • Victoria-Daly Region
      • Pine Creek
Petrella (2015)
  • Queensland
    • Tablelands Region
R Bottrill
  • Victoria
    • Golden Plains Shire
      • Pittong
Birch (2001)
    • Towong Shire
      • Thologolong
Museum Victoria Mineralogy Collection
  • Western Australia
    • Coolgardie Shire
      • Coolgardie
Palache et al. (1951)
    • Cue Shire
      • Poona
Hodge (1970)
China
  • Fujian
    • Ningde
      • Fu'an Co.
www.minsocam.org (2009)
Czech Republic
  • Karlovy Vary Region
    • Sokolov District
      • Krásno
        • Vysoký Kámen
Sejkora et al. (2006)
  • Ústí nad Labem Region
    • Teplice District
Jiří Sejkora - Sekundární minerály ...
        • Knöttel area
Samples was analysed by P. Pauliš.
J.Sejkora
Europe
  • Ore Mountains
Paulis et al. (2003)
Germany
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Walenta (1992) +1 other reference
  • Saxony
    • Erzgebirgskreis
      • Schneeberg
        • Neustädtel
Journal of the Washington Academy of Science (1914) +2 other references
          • Wolfgangmaßen
Massanek et al. (2005)
    • Görlitz District
      • Königshain
Witzke et al. (2007)
      • Thiemendorf
Witzke et al. (2007)
Italy
  • Lombardy
    • Varese Province
      • Cuasso al Monte
        • Cavagnano
Gentile et al. (2023)
        • Cuasso al Piano
Gentile et al. (2023)
  • Sardinia
    • Metropolitan City of Cagliari
      • Sarroch
Orlandi et al. (2011) +1 other reference
Orlandi et al. (2005)
    • South Sardinia Province
      • Domusnovas
- (n.d.)
Japan
  • Gifu Prefecture
    • Nakatsugawa City
      • Hirukawa
浜地忠男 (1961) +1 other reference
  • Tochigi Prefecture
    • Nikko City
      • Ashio
Sadanaga et al. (1974)
Kazakhstan
  • Jambyl Region
    • Moiynkum District
Jermolenko (2002)
  • Karaganda Region
    • Balkhash
      • Kounrad Massif
Pavel.M. Kartashov (n.d.)
Mexico
  • Sonora
    • Imuris Municipality
dan weinrich
Poland
  • Lower Silesian Voivodeship
    • Karkonosze County
Kozłowski et al. (2016)
      • Szklarska Poręba
Mochnacka et al. (2015) +1 other reference
South Africa
  • Gauteng
    • City of Tshwane Metropolitan Municipality
S. Weinert (2006) +1 other reference
  • Limpopo
    • Capricorn District Municipality
      • Polokwane Local Municipality
Cairncross et al. (1995)
Spain
  • Andalusia
    • Córdoba
      • Belalcázar
        • La Ventosilla farmhouse
Rewitzer et al. (2018)
  • Extremadura
    • Badajoz
      • Valle de la Serena
Calvo (2009)
UK
  • England
    • Cumbria
      • Eden
        • Shap Rural
M.Wirth collection
USA
  • Arizona
    • Gila County
      • Miami-Inspiration Mining District
        • Inspiration
          • Miami-Inspiration deposit
Anthony et al. (1995)
  • California
    • Plumas County
      • Last Chance Mining District
        • Adams Peak
Dunning et al. (1998)
Dunning et al. (2005)
  • Colorado
    • Lake County
      • Climax Mining District
        • Climax
Eckel et al. (1997)
  • Nevada
    • Nye County
      • Toquima Range
        • Round Mountain Mining District
Cooper et al. (1991)
  • Washington
    • Stevens County
      • Springdale Mining District
Wolff et al. (2014)
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