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Koechlinite

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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 molybate analogue of russellite.


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Classification of KoechliniteHide

Approved, 'Grandfathered' (first described prior to 1959)
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

Physical Properties of KoechliniteHide

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

Type:
Biaxial (-)
RI values:
nα = 2.520 nβ = 2.610 nγ = 2.670
Max Birefringence:
δ = 0.150
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
none
Pleochroism:
Weak
Comments:
In shades of greenish yellow.
Comments:
2V measured = large.

Chemical Properties of KoechliniteHide

Formula:
Bi2MoO6

Crystallography of KoechliniteHide

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 agrgegates 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.
Epitaxi Comments:
Parallel growths with an unidentified orthorhombic mineral reported.

Type Occurrence of KoechliniteHide

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

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

Relationship of Koechlinite to other SpeciesHide

Other Members of this group:
RusselliteBi2WO6Orth.
TungstibiteSb3+2WO6Orth. 2 2 2

Common AssociatesHide

Associated Minerals Based on Photo Data:
Bismuthinite5 photos of Koechlinite associated with Bismuthinite on mindat.org.
Zavaritskite1 photo of Koechlinite associated with Zavaritskite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.DE.05DowneyiteSeO2Tet.
4.DE.10Koragoite(Mn2+,Fe3+)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20Mon. 2 : P21
4.DE.15RusselliteBi2WO6Orth.
4.DE.15TungstibiteSb3+2WO6Orth. 2 2 2
4.DE.20TelluriteTeO2Orth. mmm (2/m 2/m 2/m)
4.DE.25ParatelluriteTeO2Tet.
4.DE.30BismutotantaliteBi(Ta,Nb)O4Orth.
4.DE.30BismutocolumbiteBi(Nb,Ta)O4Orth. mmm (2/m 2/m 2/m)
4.DE.30CervantiteSb3+Sb5+O4Orth.
4.DE.30StibiotantaliteSb(Ta,Nb)O4Orth. mm2
4.DE.30StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
4.DE.30ClinocervantiteSb3+Sb5+O4Mon.
4.DE.35BaddeleyiteZrO2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.3.1LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
27.3.2PowelliteCa(MoO4)Tet. 4/m : I41/a
27.3.3WulfenitePb(MoO4)Tet. 4/m : I41/a
27.3.5SedoviteU(MoO4)2Orth.
27.3.6MouriteUMo5O12(OH)10Mon.
27.3.7Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
27.3.8Umohoite(UO2)MoO4 · 2H2OTric.
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2O
27.3.10CousiniteMgU2Mo2O11 · 6H2O
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
27.3.12TengchongiteCaO · 6UO3 · 2MoO3 · 12H2OOrth.
27.3.13KamiokiteFe2Mo3O8Hex.
27.3.14FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

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.

References for KoechliniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schaller (1916) U.S. Geological Survey Bulletin 610: 10.
Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 212.
Frondel, C. (1943) New data on agricolite, koechlinite, and the bismuth arsenates. American Mineralogist, 28, 536–540.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1092-1093.
Zemann, J. (1956): Die Kristallstruktur von Koechlinit, Bi2MoO6. Contributions to Mineralogy and Petrology 5(2), 139-145 (in German).
Yushkin, N.P. (1969) The first find of koechlinite in the USSR. Doklady Acad. Nauk SSSR, 189, 852–855 (in Russian).
Teller, R.G., J.F. Brazdil, R.K. Grasselli, and J.D. Jorgensen (1984) The structure of bismuth molybdate,
Bi2MoO6, by powder neutron diffraction. Acta Crystallographica (1984): C40: 2001-2005.
Acta Crystallographica: B29: 2436-2438.

Internet Links for KoechliniteHide

Localities for KoechliniteHide

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

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • New South Wales
    • Bourke Co.
      • Ardlethan
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1093.
    • Gough Co.
      • Elsmore
Rankin, J., Lawrence, L. J., Sharpe, J. L. and Williams, P. A. (2002): Rare secondary bismuth, tungsten and molybdenum minerals from Elsmore, New England district of New South Wales. Australian Journal of Mineralogy 8, 55-60.; Rankin, J., Lawrence, L. J., Sharpe, J. L. and Williams, P. A. (2002): Rare secondary bismuth, tungsten and molybdenum minerals from Elsmore, New England district of New South Wales. Australian Journal of Mineralogy 8, 55-60.
      • Kingsgate
Sharpe, J.L., & Williams P.A. (2004) - Secondary bismuth and molybdenum minerals from Kingsgate, New England district of New South Wales.- Australian Journal of Mineralogy, vol.10, n°1.
Clissold, M. E. (2007) Aspects of the Supergene Geochemistry of Copper, Nickel and Bismuth. PhD Thesis University of Sydney, Australia 162pp.
  • Queensland
    • Tablelands Region
R Bottrill, 2015, unpub rept
  • Victoria
    • Golden Plains Shire
      • Pittong
W.D.Birch 2001. A note on koechlinitr from Pittong, Victoria. Australian Journal of Mineralogy: 7(2), pp. 77-79
    • Towong Shire
      • Thologolong
Museum Victoria Mineralogy Collection
  • Western Australia
    • Coolgardie Shire
      • Coolgardie
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1093.
    • Cue Shire
      • Poona
Hodge, L.C.(1970): Russellite- a second occurrence, Mineralogical Magazine, 1970: 37: 705-707
China
 
  • Fujian Province
    • Ningde Prefecture
      • Fu'an Co.
http://www.minsocam.org/ammin/AM76/AM76_665.pdf
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Horní Slavkov (Schlaggenwald)
        • Krásno (Schönfeld)
          • Vysoký Kámen
Sejkora, J., Ondruš, P., Fikar, M., Veselovský, F., Mach, Z. & Gabašová, A. (2006): New data on mineralogy of the Vysoký Kámen deposits near Krásno, Slavkovský les area, Czech Republic. Journal of the Czech Geological Society 51, 43-55.
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
Jiří Sejkora - Sekundární minerály Bismutu z povrchového výchozu
          • Knöttel area (Knötel; Knödel; Knödlberg)
J.Sejkora, M.Kotrly - Sekundární minerály Bismutu z povrvhového výchozu křemenného pně. 1998
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); WALENTA, K. (1993): Neue Mineralfunde von der Grube Clara (5. Folge). - Lapis 18 (1), 16-23.
  • Saxony
    • Erzgebirge
      • Schneeberg District
        • Neustädtel
Journal of the Washington Academy of Science (1914): 4, 354-356; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1093; Wittern: "Mineralfundorte in Deutschland", 2001
Lapis 30(7/8):41-70 (2005)
    • Oberlausitz
      • Görlitz
        • Königshain
Witzke, T. & Giesler, T. (2007): Wismut-Mineralien aus dem Königshainer Granit, Lausitz.- Mineralien-Welt 18(4), 14-19
        • Thiemendorf
Witzke, T. & Giesler, T. (2007): Wismut-Mineralien aus dem Königshainer Granit, Lausitz.- Mineralien-Welt 18(4), 14-19
Italy
 
  • Sardinia
    • Cagliari Province
      • Sarroch
Orlandi, P., Demartin, F., Pasero, M., Leveret,P., William, P.A., Hibbs,D.E., (2011), Gelosaite BiMo6+(2–5x)Mo5+6xO7(OH)·H2O (0 ≤ x ≤ 0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia. Am. Min.: 96: 268 - 273. ; Orlandi P., Gelosa M., Bonacina E., Caboni F., Mamberti M., Tanca G.A., Vinci A. (2015): Sette nuove specie mineralogiche della Sardegna. I minerali della mineralizzazione a molibdeno e bismuto di Su Seinargiu (CA). Riv. Mineral. Ital., 39, 2, 84-115.
Orlandi, P. & Campostrini, I. (2005): Zibaldone. Aggiornamenti di mineralogia italiana 2004. Rivista Mineralogica Italiana, 3/2005, 184-191.
    • Carbonia-Iglesias Province
      • Domusnovas
        • Oridda
AA. VV., 1996. Collezionare minerali. Hobby & Work
Japan
 
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Nakatsugawa City
          • Hirukawa
Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo; 浜地忠男, & 谷正巳. (1961). 岐阜県苗木地方ウラン調査報告. 纐纈山および西大洞地区の砂鉱. 地調月報, 11, 34-40.
    • Kanto region
      • Tochigi Prefecture
        • Nikko City
          • Ashio-machi
Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo
Kazakhstan
 
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
    • Balkhash Region (Balqash; Karatas; Prebalkhashie)
      • Balkhash (Balqash)
        • Kounrad Massif
Pavel M. Kartashov analytical data
    • Betpakdala Desert (Bet-Pak-Dal Desert)
Jeremolenko, V. (2002): Kara-Oba: Mineralogische Perle der Betpak-Ebene bei Dzhambul, Kasachstan. Lapis 27 (4), 13-34 + 50
Mexico
 
  • Sonora
    • Mun. de Imuris
dan weinrich
South Africa
 
  • Gauteng Province
    • Pretoria District (Tshwane District)
S. Weinert (2006) Locality Data Sheet ML35 (South African Micromount Society); Rocks & Minerals 83:5 pp 410-421
  • Limpopo Province
    • Bushveld Complex
      • Waterberg District
        • Mokopane (Potgietersrus)
Minerals of South Africa
Spain
 
  • Extremadura
    • Badajoz
      • Valle de la Serena
Calvo, M. (2009). Minerales y Minas de España. Vol. IV, Óxidos e Hidróxidos. Escuela Técnica Superior de Ingenieros de Minas de Madrid - Fundación Gómez Pardo. 752 pp.
UK
 
  • England
    • Cumbria
      • Eastern Fells
        • Shap
M.Wirth collection
USA
 
  • Arizona
    • Gila Co.
      • Globe-Miami District
        • Miami-Inspiration District
          • Inspiration
            • Miami-Inspiration deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 268.
  • California
    • Plumas Co.
      • Diamond Mts
        • Last Chance District
          • Adams Peak
Mineralogical Record (1998): 29: 165.
Dunning, G.E., Cooper, J.F. (2005) Mineralogy of the Spring Creek area, Last Chance mining district, Plumas County, California. Axis: 1: 1-30.
  • Colorado
    • Lake Co.
      • Climax District
        • Climax
Minerals of Colorado (1997) Eckels, E. B.
  • Nevada
    • Nye Co.
      • Toquima Range
        • Round Mountain District
[MinRec 22:181]
Mineral and/or Locality  
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