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Murdochite

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Formula:
PbCu6O8-x(Cl,Br)2x where x<=0.5
System:
Isometric
Colour:
Black
Hardness:
4
Name:
After Professor Joseph Murdoch [February 19, 1890 Washington, D.C., USA – December 31, 1973 Santa Monica, California, USA], professor of mineralogy, University of California, Los Angeles, California, USA. Murdoch was an authority on ore microscopy and ore genesis.
A secondary mineral found in the oxidized zones of lead-copper deposits.

Classification of Murdochite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.DB.45

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
4.6.5.1

4 : SIMPLE OXIDES
6 : Miscellaneous
7.11.25

7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
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Type Occurrence of Murdochite

Year of Discovery:
1953

Physical Properties of Murdochite

Adamantine
Colour:
Black
Streak:
Black
Hardness (Mohs):
4
Hardness (Vickers):
VHN100=519 - 567 kg/mm2
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {111}.
Density:
5.9 - 6.7 g/cm3 (Measured)    6.06 g/cm3 (Calculated)

Crystallography of Murdochite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Cell Parameters:
a = 9.21Å
Unit Cell Volume:
V 781.23 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals octahedral and cubo-octahedral.
Twinning:
Common on unstated law.
Comment:
Cell parameter data: a = 9.210-9.224.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Murdochite

Type:
Isotropic
Type:
Isotropic
Colour in reflected light:
grey with a yellowish brown tint

Chemical Properties of Murdochite

Formula:
PbCu6O8-x(Cl,Br)2x where x<=0.5
Essential elements:
All elements listed in formula:

Relationship of Murdochite to other Species

3.DB.RickturneritePb7O4[Mg(OH)4](OH)Cl3
3.DB.05DiaboleitePb2CuCl2(OH)4
3.DB.10PseudoboleitePb31Cu24Cl62(OH)48
3.DB.15BoleiteKPb26Ag9Cu24(OH)48Cl62
3.DB.20CumengeitePb21Cu20Cl42(OH)40 · 6H2O
3.DB.25BideauxitePb2AgCl3(F,OH)2
3.DB.30ChloroxiphitePb3CuO2Cl2(OH)2
3.DB.35HematophanitePb4Fe3O8(OH,Cl)
3.DB.40AsisitePb7SiO9Cl2
3.DB.40ParkinsonitePb7MoO9Cl2
3.DB.50YedlinitePb6Cr3+Cl6(O,OH,H2O)8
7.11.1RomarchiteSnO
7.11.2CassiteriteSnO2
7.11.4SchoenfliesiteMg[Sn(OH)6]
7.11.5BurtiteCa[Sn(OH)6]
7.11.6VismirnoviteZn[Sn(OH)6]
7.11.7WickmaniteMn2+[Sn(OH)6]
7.11.8TetrawickmaniteMn2+[Sn4+(OH)6]
7.11.9Jeanbandyite(Fe2+,Mn2+)[Sn4+(OH)6]
7.11.10NataniteFe2+[Sn(OH)6]
7.11.11Mushistonite(Cu,Zn,Fe2+)[Sn(OH)6]
7.11.12Ferronigerite-2N1S(Al,Fe,Zn)2(Al,Sn)6O11(OH)
7.11.13Magnesionigerite
7.11.14ArgutiteGeO2
7.11.15BrunogeieriteFe22+Ge4+O4
7.11.16StottiteFe2+[Ge4+(OH)6]
7.11.17CarboiriteFeAl2(GeO4)O(OH)2
7.11.18OtjisumeitePbGe4O9
7.11.19BartelkeitePb(Fe2+Ge)[Ge2O7](OH)2 · H2O
7.11.20MassicotPbO
7.11.21LithargePbO
7.11.22MiniumPb3O4
7.11.23PlattneritePbO2
7.11.24Scrutinyiteα-PbO2
7.11.26MacedonitePbTiO3
7.11.27CesàrolitePb(Mn4+)3O6(OH)2
7.11.28CoronaditePb(Mn64+Mn23+)O16
7.11.29QuenselitePbMnO2(OH)
7.11.30PlumboferritePb2Fe3+11-xMnx2+O19-2x, x = 1/3
7.11.31Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19
7.11.32SenaitePb(Ti,Fe,Mn)21O38

Other Names for Murdochite

Name in Other Languages:

Other Information

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 Murdochite

Reference List:
Fahey, J.J. (1955), Murdochite, a new copper lead oxide mineral, American Mineralogist: 40: 905-906.

Christ, C.L. and J.R. Clark (1955) The crystal structure of murdochite. American Mineralogist, 40, 907–916.

Burke, E.A.J. and P. Maaskant (1970) New data on murdochite. Neues Jahrb. Mineral., Monatsh., 558–565.

Dubler, E., Vedani, A., and Oswald, H.R. (1983) New structure determination of murdochite, Cu6PbO8. Acta Crystallographica (1983): C39: 1143-1146.

Internet Links for Murdochite

Localities for Murdochite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • Western Australia
    • Roebourne Shire
      • Whim Creek
P. Downes, J. Bevan & A. Bevan (1998) - Minerals of the Whim Creek copper mine, Western Australia - Australian Journal of Mineralogy, Vol. 4, N°1, pp 13-29
Chile
 
  • Atacama Region
    • Copiapó Province
      • Zapallar district
maurizio dini collection
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
Fritz Schreiber collection
        • Sounion Area
          • Agia Varvara Mines (St Barbara Mines)
Branko Rieck collection
Lapis, 24, 7/8, (1999)
Iran
 
  • Esfahan Province (Isfahan Province; Aspadana Province)
    • Nain County (Nayin County)
      • Anarak District
Karl Heinz Fabritz collection (Uwe Kolitsch SXRD analysis); Adib, D. and Ottemann, J. (1970): Mineralium Deposita, 5, 86-93
Italy
 
  • Tuscany
    • Grosseto Province
      • Montieri
        • Gerfalco
Batacchi, C., Cadoni, M., Ciriotti, M.E. (2011): Murdochite di Fosso Mandromicci, Gerfalco, Toscana: primo ritrovamento italiano. Micro (Periodico dell'AMI). 2011 (3), 101-112
Mexico
 
  • Chihuahua
    • Mun. de Aquiles Serdán
      • Santa Eulalia District
        • East Camp
Megaw, P.K.M., 1990b, Geology and geochemistry of the Santa Eulalia mining district, Chihuahua, Mexico.: Unpublished Ph.D. Thesis, Univ. of Arizona, 549 p
  • Durango
    • Mun. de Mapimí
      • Mapimí
Rocks & Min.: 56:247.
Thomas P. Moore (2008) Lapis, 33, #7-8, 33-40.
Thomas P. Moore (2008) Lapis, 33, #7-8, 33-40.
USA
 
  • Arizona
    • Cochise Co.
      • Mule Mts
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 331.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.:69
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 28.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 308; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 308; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Hayden area
            • Chilito
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 123, 308; Keith, S.B. (1972), Mineralogy and paragenesis of the 79 mine lead-zinc-copper deposit, Min.Rec.: 3: 247-264;
    • La Paz Co.
      • New Water Mts
Hunt, W. (1983) Calciovolborthite from the New Water Mountains Yuma County, Arizona. Mineralogical Record 14:119
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
              • Tiger Wash
MinRec 19(3):81-87.
Yang, H., Downs, R.T., Evans, S.H., Jenkins, R.A., Bloch, E.M. (2013): Rongibbsite, Pb2(Si4Al)O11(OH), a new zeolitic aluminosilicate mineral with an interrupted framework from Maricopa County, Arizona, U.S.A. American Mineralogist, 98, 236-241
    • Pima Co.
      • Waterman Mts
        • Waterman District
          • Silver Hill District
            • Silver Hill
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 123, 308, 331; Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, AZ Geol. Soc. Digest: 3: 53-56.
    • Pinal Co.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 308; Fahey, J.J. (1955), Murdochite, a new copper lead oxide mineral, Am.Min.: 40: 905-906; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 28.
      • Tohono O'odham Indian Reservation
        • Silver Reef District
          • Tat Momoli Mts
            • Chuichu area
              • Silver Reef Mountains area
                • White Horse Pass area
Collected by and in the collection of Brent Thorne
  • California
    • San Bernardino Co.
      • Baker
        • Otto Mountain
Joe Marty specimens
      • Barstow
        • Lead Mountain
www.mineralsocal.org
      • Soda Lake Mts
        • Baker
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 183-184; Mills, S. J., Kampf, A. R., Kolitsch, U., Housley, R. M. & Raudsepp, M. (2010) The crystal chemistry and crystal structure of kuksite, Pb3Zn3Te6+P2O14, and a note on the crystal structure of yafsoanite, (Ca,Pb)3Zn(TeO6)2. American Mineralogist, 95(7), 933–938; www.mineralsocal.org.
  • Montana
    • Granite Co.
      • Philipsburg District (Flint Creek District)
        • John Long Mts
          • Black Pine Ridge
Martin Jensen and Tony Nikischer (2012) Some notes on the mineralogy of the Black Pine Mine, Granite County, Montana. Mineral News, 28, #6, 1-10.
  • Nevada
    • Clark Co.
      • Alunite District
Richard W. Thomssen; Robert M. Housley (2005) Recent rare mineral finds in southern California and Nevada desert mines. Abstracts from the 2005 Desert Symposium. California State University, Desert Studies Consortium and LSA Associates, Inc.
    • Nye Co.
      • Paradise Range
        • Gabbs District
Ron Layton Collection
  • New Mexico
    • Hidalgo Co.
      • San Simon District
        • Granite Gap
R&M 77:5 p298-305
R&M 77:5 p298-305
    • Luna Co.
      • Cooks Peak District (Cooke's Peak District)
        • Old Hadley (Graphic) Mining District
Walstrom 2006 New Mexico Mineral Symposium abstracts
    • Sierra Co.
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
    • Socorro Co.
Northrop, Minerals of New Mexico, 3rd Rev. ed., 1996
        • Bingham
Minerals of New Mexico 3rd ed.
Ian Merkel
[MinRecord 30:337]
Mineral and/or Locality  
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