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Cumengeite

This page kindly sponsored by John Kashuba
Formula:
Pb21Cu20Cl42(OH)40 · 6H2O
Colour:
Indigo blue
Lustre:
Sub-Vitreous
Hardness:
Specific Gravity:
4.656
Crystal System:
Tetragonal
Name:
After Édouard Cumenge (April 16, 1828- July 20, 1902), French mining engineer at Boleo, Mexico.
A secondary mineral.
May be confused with diaboleite.

Correct spelling defined by Burke (2008); other, incorrect spelling is cumengéite.


Hide all sections | Show all sections

Classification of CumengeiteHide

Approved, 'Grandfathered' (first described prior to 1959)
3.DB.20

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
Dana 7th ed.:
10.6.7.1
10.6.7.1

10 : OXYHALIDES AND HYDROXYHALIDES
6 : AmBn(O,OH)pXq

Physical Properties of CumengeiteHide

Sub-Vitreous
Transparency:
Translucent
Colour:
Indigo blue
Streak:
Sky-blue
Hardness:
2½ on Mohs scale
Cleavage:
Distinct/Good
{101} good; {110} distinct; {001} Poor.
Density:
4.656 g/cm3 (Measured)    4.66 g/cm3 (Calculated)

Optical Data of CumengeiteHide

Type:
Uniaxial (-)
RI values:
nω = 2.026 - 2.041 nε = 1.926 - 1.965
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Visible
Comments:
Dichroic.
O = darker blue with green tint
E = Pure blue

Chemical Properties of CumengeiteHide

Formula:
Pb21Cu20Cl42(OH)40 · 6H2O

Crystallography of CumengeiteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Cell Parameters:
a = 15.065(2) Å, c = 24.436(5) Å
Ratio:
a:c = 1 : 1.622
Unit Cell V:
5,545.85 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Octahedral or cubo-octahedral crystals. Commonly on the faces of boleite or pseudoboleite.

Epitaxial Relationships of CumengeiteHide

Epitaxial Minerals:
PseudoboleitePb31Cu24Cl62(OH)48
BoleiteKPb26Ag9Cu24(OH)48Cl62
Epitaxy Comments:
Parallel overgrowths of cumengite on crystals of boleite and pseudoboleite.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.02 (4)
4.86 (9)
3.98 (4)
3.73 (6)
3.08 (4)
2.66 (4)
2.38 (10)

Type Occurrence of CumengeiteHide

Synonyms of CumengeiteHide

Other Language Names for CumengeiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Boleite24 photos of Cumengeite associated with Boleite on mindat.org.
Pseudoboleite12 photos of Cumengeite associated with Pseudoboleite on mindat.org.
Cerussite7 photos of Cumengeite associated with Cerussite on mindat.org.
Paratacamite5 photos of Cumengeite associated with Paratacamite on mindat.org.
Diaboleite4 photos of Cumengeite associated with Diaboleite on mindat.org.
Cuprite4 photos of Cumengeite associated with Cuprite on mindat.org.
Baryte4 photos of Cumengeite associated with Baryte on mindat.org.
Gypsum3 photos of Cumengeite associated with Gypsum on mindat.org.
Clinoatacamite3 photos of Cumengeite associated with Clinoatacamite on mindat.org.
Mimetite3 photos of Cumengeite associated with Mimetite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.DB.RickturneritePb7O4[Mg(OH)4](OH)Cl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.DB.05DiaboleitePb2CuCl2(OH)4Tet. 4mm : P4mm
3.DB.10PseudoboleitePb31Cu24Cl62(OH)48Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DB.15BoleiteKPb26Ag9Cu24(OH)48Cl62Iso. m3m (4/m 3 2/m) : Pm3m
3.DB.25BideauxitePb2AgCl3(F,OH)2Iso. m3m (4/m 3 2/m) : Fd3m
3.DB.30ChloroxiphitePb3CuO2Cl2(OH)2Mon. 2/m : P21/m
3.DB.35HematophanitePb4Fe3O8(OH,Cl)Tet. 4/mmm (4/m 2/m 2/m)
3.DB.40AsisitePb7SiO9Cl2 Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DB.40ParkinsonitePb7MoO9Cl2 Tet.
3.DB.45MurdochitePbCu6O8-x(Cl,Br)2x where x<=0.5Iso. m3m (4/m 3 2/m) : Fm3m
3.DB.50YedlinitePb6Cr3+Cl6(O,OH,H2O)8Trig. 3 : R3

Other InformationHide

Notes:
Soluble 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 CumengeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mallard F E (1893) Sur la boléite, la cumengéite et la percylite. Bulletin de la Société Française de Minéralogie 16, 184-195
Lacroix A (1895) Sur quelques minéraux des mines du Boléo (Basse-Californie). Bulletin du Muséum D'Histoire Naturelle 1, 39-42
Friedel (1906) Bulletin de la Société française de Minéralogie: 29: 14.
Hadding (1919) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 41: 175.
Gossner and Arm (1929) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 72: 202.
Hocart (1930) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 74: 20.
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 79.
Hawthorne, F. C.; Groat, L. A. (1986): The crystal structure and chemical composition of cumengeite. Mineralalogical Magazine: 50, 157-162.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (1997) Handbook of Mineralogy, Volume III. Halides, Hydroxides, Oxides. Mineral Data Publishing, Tucson, AZ, 628pp.: 150.
Cruciani, G., Orlandi, P., Pasero, M., Russo, M. (2005): First Italian occurrence of cumengéite from Vesuvio: crystal structure refinement and revision of the chemical formula. Mineralogical Magazine, 69, 1037-1045.
Burke, E. A. J. (2008): Tidying up Mineral Names: An IMA scheme for Suffixes, Hyphens and Diacritical Marks. Mineralogical Record, 39, 131-135.

Internet Links for CumengeiteHide

Localities for CumengeiteHide

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
    • Yancowinna Co.
Worner, H. K. and Mitchell, R. W., eds. Birch, W. D. (et al) (1982) Minerals of Broken Hill, published by Australian Mining & Smelting Limited ISBN 0-909221-18-9
  • South Australia
    • Mt Lofty Ranges
      • South Mt Lofty Ranges (Adelaide Hills)
        • Clarendon
Kolitsch, U. and Elliott, P. (1999): Mineralogy of the Mount Malvern Mine near Clarendon, South Australia. Australian J. Mineral. 5, 3-17.
  • Tasmania
    • Central Coast municipality
      • Penguin
Bottrill, R.S. & Baker, W.E. (2008) A Catalogue of the Minerals of Tasmania. Bull. 73. Minerals Resources Tasmania
  • Western Australia
    • Ashburton Shire
Nickel, E.H., Gartrell, B.J. (1993) Secondary Minerals of Ashburton Downs Western Australia, Mineralogical Record (May-June 1993) 24:3: 203-218.
Ashburtonite, a new bicarbonate-silicate mineral from Ashburton Downs; J.D. Grice, E.H. Nickel, R.A. Gault; American Mineralogist, Vol 76, 001701-1707, 1991
    • Northampton Shire
Downes, P.J., Deacon, G.L., Grguric, B.A., Bevan, A.W.R., Blockley, J., Verrall, M. (2017): Minerals of the Northampton Lead-Copper Field Western Australia, Australian Journal of Mineralogy, 18 (1), 35-49.
Downes, P.J., Deacon, G.L., Grguric, B.A., Bevan, A.W.R., Blockley, J., Verrall, M. (2017), Minerals of the Northampton Lead-Copper Field Western Australia, Australian Journal of Mineralogy, Vol 18 (1), pp 42, June 2017
Austria
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Waitschach
Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Antofagasta
Arfè, G., Boni, M., Mondillo, N., Aiello, R., Balassone, G., Arseneau, V. and Soyk, D. (2016): Supergene alteration in the Capricornio Au-Ag epithermal vein system, Antofagasta Region, Chile. Can. Mineral. 54, 681-706.
    • Tocopilla Province
      • Gatico District
Sample analysed by Dr. Jochen Schluter (Hamburg University), Germany.
France
 
  • Provence-Alpes-Côte d'Azur
    • Var
      • Le Pradet
Cap Garonne museum specimen - EDS analysis by Association Jean Wyart, 2009
Germany
 
  • Lower Saxony
    • Harz
      • Goslar
        • Astfeld
van den Berg, W. & van Loon, C. (1990): Slag Minerals from the Rammelsberg, Harz Mountains, Germany. UK Journal of Mines & Minerals, 8, 18-23.
      • Lautenthal
Karl Volkman collection
  • North Rhine-Westphalia
    • Ruhr Coal Mining area
      • Essen
Weiss: "Mineralfundstellen, Deutschland West", 1990
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Sounion area
          • Sounion Mines
J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
Grolig, H. & Grolig, E. (1978): Lavrion in Attika. Lapis, 3 (5), 16-25; 40 (in German).
        • Agios Nikolaos [St Nicholas] area
Fritz Schreiber collection (U. Kolitsch SXRD analysis)
        • Sounion area
Fritz Schreiber collection (Uwe Kolitsch SXRD-analysis)
Ko Jansen collection
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Vrissaki area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
  • Latium
    • Rome Province
      • Anzio
Palombi, S., Bellatreccia, F. & Pucci, R. (2009): Le scorie metallurgiche di Tor Caldara, Anzio - RM. Il Cercapietre, no. 1-2, 44-56. [http://www.gminromano.it/Cercapietre/rivista09/art03.pdf]
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 22 (3), 39-41.
  • Sardinia
    • Cagliari Province
      • Villaputzu
Orlandi, P. & Campostrini, I. (2005): Zibaldone. Aggiornamenti di mineralogia italiana 2004. Rivista Mineralogica Italiana, 3/2005, 184-191.
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
          • Madonna di Fucinaia (Madonna della Fucinaia) slag heaps
http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
        • Sassetta
          • Canina Valley
Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
        • Suvereto
Luigi Chiappino data
      • Piombino
Franzini, M., Perchiazzi, N. (1992): I minerali delle scorie ferrifere etrusche di Baratti (Livorno). Atti della Società Toscana di Scienze Naturali, Memorie, Serie A, 99, 43-77; Franzini, M., Perchiazzi, N., Bartoli, M.L., Chiappino, L. (1992): Baratti (LI): una nuova località mineralogica italiana analoga al Laurion. Rivista Mineralogica Italiana, 15, 1 (1-1992), 1-14 [1a parte]; Cerutti, G., Preite, D. (1995): Mineralien der etruskischen Schlacken von Baratti, Toskana. Lapis, 20, 4, 13-18 and 50.
Mexico (TL)
 
  • Baja California Sur (BC Sur)
    • Mun. de Mulegé
      • Santa Rosalía
Bull.Soc.fr.Min.Crist. 16 (1893), 184; 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: 80; Mineralogical Record 5 (1973), 280-87; Min Mag 50 (1986), 157
          • Arroyo de la Soledad
Rocks & Min.:63:390.; 2009 New Mexico Mineral Symposium abstracts
          • Arroyo del Boleo
Panczner(1987):92-350.
Slovakia
 
  • Banská Bystrica Region
    • Revúca Co.
      • Nandráž
Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
Spain
 
  • Asturias
José Rafael González López collection.
Turkmenistan
 
  • Balkan Province
    • Cheleken Peninsula
Lebedev, L.M., Nikitina, J.B. (1983): The Cheleken ore forming system. Russ. Acad. Sci., Moscow (in Russian.)
UK
 
  • England
    • Cornwall
      • St Agnes District
        • Crantock
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
        • Newquay
No reference listed
No reference listed
          • Trevelgue
No reference listed
        • Perranzabuloe
          • Perranporth
            • Perran St George and Droskyn Mines
George Eric Stanley Curtis specimen
      • St Just District
        • St Just
          • Botallack
[Journal of the Russell Society, 6(1), 17-26 (1995)]
      • Wadebridge District
        • Padstow
          • Gunver Head
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
        • St Minver
          • Trebetherick
No reference listed
      • Wendron & Falmouth District
        • Falmouth
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications; Allan C. Dean, Robert F. Symes, John H. Thomas and Peter A. Williams (1983) Cumengéite from Cornwall. Mineralogical Magazine 47:235-236.
        • Feock
          • Penpol
Steve Sorrell collection
  • Wales
    • Gwynedd
      • Lleyn Peninsula
        • Llanengan
          • Abersoch
Dossett, I. & Green, D.I., 1998. Atacamite, botallackite and cumengeite from Abersoch, Gwynedd, Wales. Journal of the Russell Society 7(1), 37-38.
USA
 
  • Arizona
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
Collected by and in the collection of Joe Ruiz. Analyzed by the University of Arizona.
      • Painted Rock Mts
        • Painted Rock District
          • Theba
Raman ID on 2007 material; Michael Cline. Confirmed via single crystal X-ray by Dr. Marcus Origlieri.; Bob Meyer (2011) The Micro Mineral Collector. Friends of Mineralogy - Pacific Northwest Chapter Newsletter
Mineral and/or Locality  
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