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About KoechliniteHide

Rudolf I. Koechlin
Greenish yellow, white to light gray; greenish yellow in transmitted light
Specific Gravity:
8.26 (Calculated)
Crystal System:
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.

Classification of KoechliniteHide

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

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

2 : A2XO4

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

Physical Properties of KoechliniteHide

Greenish yellow, white to light gray; greenish yellow in transmitted light
Pale greenish yellow
Very brittle
On {010}, perfect on {0kl}, imperfect.
8.26 g/cm3 (Calculated)

Optical Data of KoechliniteHide

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
In shades of greenish yellow.
2V measured = large.

Chemical Properties of KoechliniteHide


Crystallography of KoechliniteHide

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

Crystal StructureHide

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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 2001-20051984synthetic0293
CIF Raw Data - click here to close
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

Simplified Chinese:钼铋矿
Traditional Chinese:鉬鉍礦

Relationship of Koechlinite to other SpeciesHide

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

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Koechlinite associated with BismuthiniteBi2S3
1 photo of Koechlinite associated with Zavaritskite(BiO)F

Related Minerals - Nickel-Strunz GroupingHide

4.DE.10Koragoite(Mn2+,Fe3+)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20Mon. 2 : P21
4.DE.15TungstibiteSb3+2WO6Orth. 2 2 2
4.DE.20TelluriteTeO2Orth. mmm (2/m 2/m 2/m)
4.DE.30BismutocolumbiteBi(Nb,Ta)O4Orth. mmm (2/m 2/m 2/m)
4.DE.30StibiotantaliteSb(Ta,Nb)O4Orth. mm2
4.DE.30StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
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
27.3.7Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
27.3.8Umohoite(UO2)MoO4 · 2H2OTric.
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2OAmor.
27.3.10CousiniteMgU2Mo2O11 · 6H2O
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2OMon.
27.3.12TengchongiteCaO · 6UO3 · 2MoO3 · 12H2OOrth.
27.3.14FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

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, W.T. (1914) Mineralogical notes. Koechlinite (bismuth molybdate), a new mineral from Schneeberg. Journal of the Washington Academy of Sciences: 4: 354-356.
Schaller, W.T. (1916) Koechlinite (bismuth molybdate), a new mineral.U.S. Geological Survey Bulletin 610: 10-34.
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., and 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).
van den Elzen, Rieck G.D. (1973) Redetermination of the structure of Bi2MoO6, koechlinite. Acta Crystallographica: B29: 2436-2438.
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: C40: 2001-2005.
Olmi, F., Sabelli, C., Brizzi, G. (1988) Agardite-(Y), Gysinite-(Nd) and other rare minerals from Sardinia. The Mineralogical Record: 19: 305-310.

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.
  • 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., Williams, P.A. (2002) Rare secondary bismuth, tungsten and molybdenum minerals from Elsmore, New England district of New South Wales. Australian Journal of Mineralogy, 8:1, 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, 10(1), 7-12.
Clissold, M. E. (2007) Aspects of the Supergene Geochemistry of Copper, Nickel and Bismuth. PhD Thesis University of Sydney, Australia 162pp.
  • Northern Territory
    • Victoria-Daly Region
      • Pine Creek
Petrella, L. (2015). Partial relinquishment report on EL 29523 Mount Machlan Pine Creek for the period 10 May 2013 to 9 May 2015.
  • 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
  • Fujian
    • Ningde
      • Fu'an Co.
Czech Republic
  • Karlovy Vary Region
    • Sokolov District
      • Krásno
        • 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 nad Labem Region
    • Teplice District
Jiří Sejkora - Sekundární minerály Bismutu z povrchového výchozu
        • Knöttel area (Knötel; Knödel; Knödlberg)
smples was analysed by P.Pauliš
J.Sejkora, M.Kotrly - Sekundární minerály Bismutu z povrvhového výchozu křemenného pně. 1998
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Wolfach
          • Oberwolfach
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
    • Erzgebirgskreis
      • Schneeberg
        • 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)
    • Görlitz District
      • 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
  • Sardinia
    • Metropolitan City of Cagliari
      • 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.
    • South Sardinia Province
      • Domusnovas
        • Oridda Valley
AA. VV., 1996. Collezionare minerali. Hobby & Work
  • 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.
  • Tochigi Prefecture
    • Nikko City
      • Ashio
Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo
  • Karaganda Region
    • Balkhash
      • Kounrad Massif
Pavel M. Kartashov analytical data
    • Karazhal
      • 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
  • Sonora
    • Imuris Municipality
dan weinrich
  • Lower Silesian Voivodeship
    • Jelenia Góra County
      • Szklarska Poręba
        • Szklarska Poręba-Huta
Kozłowski, A., & Matyszczak, W. (2018). Oxygenic bismuth minerals in the NE part of the Karkonosze pluton (West Sudetes, SW Poland). Acta Geologica Polonica, 68(4).; Mochnacka, K., Oberc-Dziedzic, T., Mayer, W., & Pieczka, A. (2015). Ore mineralization related to geological evolution of the Karkonosze–Izera Massif (the Sudetes, Poland)—Towards a model. Ore Geology Reviews, 64, 215-238.
South Africa
  • Gauteng
    • City of Tshwane Metropolitan Municipality
S. Weinert (2006) Locality Data Sheet ML35 (South African Micromount Society); Rocks & Minerals 83:5 pp 410-421
  • Limpopo
    • Waterberg District
      • Mogalakwena
        • Mokopane (Potgietersrus)
Cairncross, B., Dixon, R. (1995) Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, PO Box 44283, Linden 2104, South Africa.
  • Andalusia
    • Córdoba
      • Belalcázar
        • La Ventosilla farmhouse
Rewitzer, C., Calvo, M. Hochleitner, R., and Utrera, C. (2018). Adamite, austinite, schlegelite, dugganite and other uncommon minerals in the “Cogolla Alta” claim,Belalcázar, Córdoba, Spain. Mineral Up, 5 (2), 50-77.
  • 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.
  • England
    • Cumbria
      • Eden
        • Shap Rural
M.Wirth collection
  • Arizona
    • Gila Co.
      • Globe-Miami Mining District
        • Miami-Inspiration Mining District
          • Inspiration
            • Miami-Inspiration deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 268.
  • California
    • Plumas Co.
      • Last Chance Mining 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 Mining District
        • Climax
Minerals of Colorado (1997) Eckel, E. B.
  • Nevada
    • Nye Co.
      • Toquima Range
        • Round Mountain Mining District
[MinRec 22:181]
  • Washington
    • Stevens Co.
      • Huckleberry Range
        • Deer Trail & Cedar Canyon Mining Districts
          • Adams Mountain
Wolff, F. E., Garcia, B. T., McKay, D. T., & Norman, D. K. (2014). Inactive and Abandoned Mine Lands: Germania Mine, Cedar Canyon Mining District, Stevens County, Washington. Washington State Department of Natural Resources.
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