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Molybdofornacite

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Formula:
Pb2Cu(MoO4,CrO4)(AsO4,PO4)(OH)
Colour:
Light green
Lustre:
Adamantine
Hardness:
2 - 3
Crystal System:
Monoclinic
Isostructural with:
This page provides mineralogical data about Molybdofornacite.


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Classification of MolybdofornaciteHide

Approved
Approval Year:
1982
7.FC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
C : With PO4, AsO4, SiO4
43.4.3.3

43 : COMPOUND PHOSPHATES, ETC.
4 : Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.5.5

22 : Phosphates, Arsenates or Vanadates with other Anions
5 : Phosphates, arsenates or vanadates with chromate, molybdate, niobate or tantalate

Physical Properties of MolybdofornaciteHide

Adamantine
Colour:
Light green
Hardness:
2 - 3 on Mohs scale

Optical Data of MolybdofornaciteHide

Type:
Biaxial (+)
RI values:
nα = 2.050 nγ = 2.150
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v strong

Chemical Properties of MolybdofornaciteHide

Formula:
Pb2Cu(MoO4,CrO4)(AsO4,PO4)(OH)
IMA Formula:
CuPb2MoO4AsO4(OH)

Crystallography of MolybdofornaciteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 8.1 Å, b = 5.94 Å, c = 17.65 Å
β = 109.17°
Ratio:
a:b:c = 1.364 : 1 : 2.971
Unit Cell V:
802.12 ų (Calculated from Unit Cell)

Type Occurrence of MolybdofornaciteHide

Synonyms of MolybdofornaciteHide

Other Language Names for MolybdofornaciteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Wulfenite13 photos of Molybdofornacite associated with Wulfenite on mindat.org.
Malachite10 photos of Molybdofornacite associated with Malachite on mindat.org.
Dioptase6 photos of Molybdofornacite associated with Dioptase on mindat.org.
Chalcocite3 photos of Molybdofornacite associated with Chalcocite on mindat.org.
Anglesite2 photos of Molybdofornacite associated with Anglesite on mindat.org.
Adularia2 photos of Molybdofornacite associated with Adularia on mindat.org.
Limonite2 photos of Molybdofornacite associated with Limonite on mindat.org.
Pyromorphite2 photos of Molybdofornacite associated with Pyromorphite on mindat.org.
Brochantite1 photo of Molybdofornacite associated with Brochantite on mindat.org.
Hemimorphite1 photo of Molybdofornacite associated with Hemimorphite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.FC.05VauquelinitePb2Cu(CrO4)(PO4)(OH)Mon. 2/m
7.FC.10FornacitePb2Cu(CrO4)(AsO4)(OH)Mon. 2/m : P21/b
7.FC.15HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2Tric.
7.FC.15IranitePb10Cu(CrO4)6(SiO4)2(OH)2Tric.
7.FC.20CassedanneitePb5(CrO4)2(VO4)2 · H2OMon.
7.FC.20EmbreyitePb5(CrO4)2(PO4)2 · H2OMon.

Related Minerals - Dana Grouping (8th Ed.)Hide

43.4.3.1VauquelinitePb2Cu(CrO4)(PO4)(OH)Mon. 2/m
43.4.3.2FornacitePb2Cu(CrO4)(AsO4)(OH)Mon. 2/m : P21/b
43.4.3.4UM1994-19-PO:CuHMoPbPb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.5.1VauquelinitePb2Cu(CrO4)(PO4)(OH)Mon. 2/m
22.5.2EmbreyitePb5(CrO4)2(PO4)2 · H2OMon.
22.5.3CassedanneitePb5(CrO4)2(VO4)2 · H2OMon.
22.5.4FornacitePb2Cu(CrO4)(AsO4)(OH)Mon. 2/m : P21/b
22.5.6Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2]Mon. 2/m : B2/m
22.5.7ParamendozaviliteNaAl4Fe7(PO4)5(PMo12O40)(OH)16 · 56H2OMon.
22.5.8Betpakdalite-CaCa[Ca2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O36(OH)]Mon. 2/m : B2/m
22.5.9Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O34(OH)3]Mon. 2/m : B2/m
22.5.10Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3]Orth. mmm (2/m 2/m 2/m) : Pmna
22.5.11Melkovite[Ca2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O36(OH)]Mon. 2/m : B2/m
22.5.12RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2OMon. 2/m : P21/m
22.5.13OlmsteaditeKFe2+2(Nb5+,Ta5+)(PO4)2O2 · 2H2OOrth.
22.5.14JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)Orth.

Other InformationHide

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 MolybdofornaciteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Neues Jahrbuch für Mineralogie, Monatshefte (1983): 289-295.
American Mineralogist (1984): 69: 567.

Internet Links for MolybdofornaciteHide

Localities for MolybdofornaciteHide

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.
Chile
 
  • Atacama Region
    • Chañaral Province
      • Inca de Oro
maurizio dini collection
    • Copiapó Province
      • Cachiyuyo de Llampos district
Maurizio Dini collection (material analysed by Dr. Jochen Schlüter)
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Ébreuil
        • Échassières
N. Meisser (XRD and SEM-EDS analyses; pers. comm. to U. Kolitsch 8/2011)
Germany
 
  • Hesse
    • Odenwald
      • Lautertal (Odenwald)
        • Reichenbach
          • Borstein
Collection of Steffen Michalski, ex-collection and collected by Klaus PETITJEAN;
Namibia (TL)
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Neues Jahrb.Min.,Mh.(1983) 289-295
Switzerland
 
  • Wallis (Valais)
    • Anniviers Valley
      • Saint-Luc
Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
USA
 
  • Arizona
    • Cochise Co.
      • Tombstone Hills
        • Tombstone District
Ron Layton self collected
Peter Mcgaw, Sugar White collected specimens
Peter Megaw, analysis by Malcomb Back, Royal Ontario Museum, Canada.
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Hummingbird Spring
https://e-rocks.com/item/shs175651/molybdofornacite (Tin Can Hill Minerals auction item/dealer label)
          • Tonopah
            • Belmont Mountain
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 303; Allen, G.B. & W. Hunt (1988), The Tonopah-Belmont Mine, Maricopa Co., AZ, Min.Rec.: 19(3): 139-144.
    • Mohave Co.
      • Buckskin Mts
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 303.
  • Nevada
    • Clark Co.
      • Spring Mts
        • Goodsprings District
          • Goodsprings
Collection of John Dagenais
    • Humboldt Co.
      • Iron Point District
        • Valmy
Dr. William S. Wise presentation to Northwest Micro Mineral Study Group on 1 May 2004, Update on Mineralogy of the Silver Coin Mine, Iron Point District, Edna Mountains, Humboldt Co., Nevada
    • Nye Co.
      • Toquima Range
        • Belmont District
          • Belmont
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Luna Co.
      • Tres Hermanas Mts
        • Tres Hermanas District
Min Rec 20:1 p57
DeMark, R.S. (1989) Micromounting in New Mexico. Min Rec 20:57-64; http://www.mindat.org/mesg-104-249776.html
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