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Member of:
Named in allusion to its monoCLINic morphology and relationship to Atacamite.
Polymorph of:
Easily confused with the closely related paratacamite.
Note that "anatacamite", originally considered a triclinic dimorph, was later recognised as twinned clinoatacamite and discredited.

Classification of Clinoatacamite


D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
Dana 7th ed.: URL:
Please feel free to link to this page.

Type Occurrence of Clinoatacamite

Physical Properties of Clinoatacamite

Green to dark greenish-black, greenish-blue.
Green to white.
Hardness (Mohs):

Crystallography of Clinoatacamite

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 6.157(2) Å, b = 6.814(3) Å, c = 9.105(5) Å
β = 99.65(4)°
a:b:c = 0.904 : 1 : 1.336
Unit Cell Volume:
V 376.58 ų (Calculated from Unit Cell)
Pseudo-rhombohedral; complex intergrowths/twins.
Very common, on {100}.

Optical Data of Clinoatacamite

Biaxial (-)
RI values:
nα = 1.830 nβ = 1.850 nγ = 1.880
Measured: 75° , Calculated: 80°
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Clinoatacamite

All elements listed in formula:

Relationship of Clinoatacamite to other Species

Member of:
Other Members of Group:
3.DA.20SimonkolleiteZn5Cl2(OH)8 · H2O
3.DA.25ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2O
3.DA.25ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
3.DA.40AnthonyiteCu(OH,Cl)2 · 3H2O
3.DA.40CalumetiteCu(OH,Cl)2 · 2H2O
3.DA.45KhaidarkaniteNa0.34Cu4Al3(OH)14F3 · 2H2O
3.DA.50BobkingiteCu5Cl2(OH)8 · 2H2O
3.DA.55AvdoniniteK2Cu5(OH)4Cl8 · H2O
3.DA.60DroninoiteNi6Fe32+(OH)16Cl2 · 4H2O

Other Names for Clinoatacamite

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 Clinoatacamite

Reference List:
Grice, J. D. Szymański, J. T., and Jambor, J. L. (1996), The crystal structure of clinoatacamite, a new polymorph of Cu2(OH)3Cl. Canadian Mineralogist: 34: 73-78.

Jambor, J. L., Dutrizac, J. E., Roberts, A. C., Grice, J. D. and Szymański, J. T. (1996): Clinoatacamite, a new polymorph of Cu2(OH)3Cl, and its relationship to paratacamite and "anarakite". Canadian Mineralogist: 34, 61-72.

Mineralogical Record: 27: 463.

Malcherek, T. & Schlüter, J. (2010): Anatacamite from La Vendida mine, Sierra Gorda, Atacama desert, Chile: a triclinic polymorph of Cu2(OH)3Cl. Neues Jahrbuch für Mineralogie - Abhandlungen, 187, 307-312. [as both clinoatacamite and "anatacamite" (later found to be twinned clinoatacamite and discredited)]

Malcharek, T. & Schlüter, J. (2008): The crystal structure of clinoatacamite and the quest for paratacamite. Poster, Annual Meeting of the DMG, Berlin, Germany, September 14-17, 2008; CD with abstracts, Abs. no. 527.

A S Wills and J-Y Henry (2008): On the crystal and magnetic ordering structures of clinoatacamite, γ-Cu2(OD)3Cl, a proposed valence bond solid. J. Phys.: Condens. Matter 20 472206.

Internet Links for Clinoatacamite

The following Clinoatacamite specimens are currently listed for sale on

Localities for Clinoatacamite

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.
Atlantic Ocean
  • Mid-Atlantic Ridge complex
Gablina, I.F., Semkova, T.A., Stepanova, T.V., and Gor'kova, N.V. (2006): Lithology and Mineral Resources 41(1), 27-44.
  • New South Wales
    • Kennedy Co.
      • Northparkes Mine (Goonumbla Mine; Endeavour Mine)
A.L. McLean, J.Chapman, J.L. Sharpe and P.A. Williams (2004): The mineralogy of the oxidised zone of the E26 orebody at Northparkes, New South Wales. Australian Journal of Mineralogy 10, 53-57.
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
Australian Jour.Min. v.6, no. 1
  • Western Australia
    • Coolgardie Shire
      • Widgiemooltha
Colchester et al., 2007
    • East Pilbara Shire
      • Rudall River District
Downes, P. J., Hope, M., Bevan, A. W. R. and Henry, D. A. (2006): Chalcocite and associated secondary minerals from the Telfer gold mine, Western Australia. Austral. J. Mineral. 12, 25-42.
  • Lower Austria
    • Industrieviertel
Kolitsch, U. & Götzinger, M. A. (2013): 1816) Azurit, Cuprit, Klinoatacamit und sekundäres Kupfer in einem Kupfergusskuchen aus dem Stadtgebiet Neunkirchen, Niederösterreich. 129 in Niedermayr, G. et al. (2013): Neue Mineralfunde aus Österreich LXII. Carinthia II, 203./123., 91-146.
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
analysed material from dr. Jochen Schluter (curator Hamburg mineralogical museum) - Arturo Molina collection
Malcherek, T. & Schlüter, J. (2010): Anatacamite from La Vendida mine, Sierra Gorda, Atacama desert, Chile: a triclinic polymorph of Cu2(OH)3Cl. Neues Jahrbuch für Mineralogie - Abhandlungen, 187, 307-312. [as both clinoatacamite and "anatacamite" (later found to be twinned clinoatacamite and discredited)]
    • El Loa Province
      • Calama
        • Chuquicamata District
Canadian Mineralogist (1996): 34: 61-72; Mineralogical Record: 27: 463.
    • Tocopilla Province
C. Ruiz Fuller/F. Peebles (1988): "Yacimientos metalíferos de Chile": Fondecyt, Stgo de Chile.
  • Arica and Parinacota Region
    • Arica Province
      • Caleta Vítor district
Samples analysed by Dr. Jochen Schluter (Hamburg University), Germany.
  • Atacama Region
    • Chañaral Province
      • El Salado
samples were analysed by Robert Jenkins at Arizona State University
  • Tarapacá Region
    • El Tamarugal Province
      • Salar Grande
Samples analysed as "anatacamite" (later found to be twinned clinoatacamite) by Anthony Kampf, Curator Emeritus of Mineral Sciences at NHM of LAC, California
  • Xinjiang Autonomous Region
    • Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture)
      • Shanshan Co. (Piqan Co.; Pichan Co.)
        • Kanggur-Xifengshan gold belt
Kaiyin Bai and Zhaoxin Han (2007): Northwestern Geology 40(2), 114-117
  • Saxony-Anhalt
    • Stassfurt Potash Deposit
  • Schleswig-Holstein
    • Helgoland Island
Markus Gerstmann collection (SXRD-analysed by Uwe Kolitsch)
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
        • Lavrion (Laurion; Laurium)
Möckel, S. (2000): Strashimirit und 11 weitere Neubestimmungen aus Lavrion (GR). Lapis 25 (7-8), 74.
      • Lavrion District slag localities
        • Agios Nikolaos [St Nicholas] area
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (II). Mineralien-Welt 25 (2), 82-95 (in German).
  • Esfahan Province (Isfahan Province; Aspadana Province)
    • Nain County (Nayin County)
      • Anarak District
Jambor, J.L. et al. (1996). "Clinoatacamite a new polymorph of Cu2(OH)3Cl and its relationship to paratactamite and "anarakite"." Canadian Mineralogist, 34,pp:61-72.
  • Co. Waterford
    • Bonmahon (Bunmahon)
      • Knockmahon
Braithwaite, R.S.W. & Wilson, J.I. (2001) J. Russell Soc., 7(2), p.96.
  • Tuscany
    • Livorno Province
      • Elba Island
        • Capoliveri
          • Cape Calamita Mine (Calamita Mine)
P. Rögner, M. Hanauer, F. Senesi (2000) - Elba orientale: nuovi ritrovamenti - Riv. Min. It., 24, 2: 102-109.
  • Sonora
    • Mun. de Santa Cruz
      • Cuitaca
Peter Megaw collection, Marcus Origlieri analysis
Papua New Guinea
  • New Ireland Province
    • Lihir Island area
A.D. Renno, L. Franz, T. Witzke, P.M. Herzig (2004) Canadian Mineralogist 42, 1-16
  • Ica Department
    • Pisco Umay
Richard Dale collection
  • Western-Siberian Region
    • Altaiskii Krai
      • Rudnyi Altai
Pekov, I.V., Lykova, I.S. (2011) Rubtsovskoe deposit, - Mineralogical Almanac, Vol. 16, 96 pp (in Rus).
  • Andalusia
    • Almería
      • Cuevas del Almanzora (Cuevas de Vera)
        • Sierra Almagrera
          • Jaroso Ravine
Georges FAVREAU collection
      • Huércal-Overa
        • Cuesta Alta
          • Cerro Minado Mines
VIÑALS, J., FAVREAU, G., and EYTIER C. & J.-R. (2010): Bobkingite, capgaronnite, juanitaite, gerhardtite, reevesite and other rare minerals from Cerro Minado, Huercal-Overa (Almería). Mineral Up, 4, 3, 6-23 Versions simultaneously published in Catalan (Mineralogistes de Catalunya); in Spanish version (Revista de Minerales).
      • Níjar
        • Rodalquilar
          • Cerro de los Guardias
Georges Favreau collection Christiane & Jean-Robert Eytier collection
      • San José
Georges FAVREAU collection
    • Córdoba
      • El Guijo
Calvo, M. (2009). Minerales y Minas de España. Vol III. Halogenuros. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 267 págs.
  • Aragón
    • Zaragoza
      • Fombuena
Calvo, G., Viñals, J. y Calvo, M. (2008). Presencia de delafossita, gibbsita y cianotriquita en un yacimiento cuprífero del barranco de la Sierra, Fombuena (Zaragoza). Macla, 9, 59-60.
  • Valencian Community
    • Castellón
Mineralogía de la concesión San Rafael, Villahermosa del Río, Castellón, España
        • San Rafael claim
- Cócera, H., Menor-Salván, C. and Muñoz-Alvarado, R. (2010): Mineralogía de la concesión San Rafael, Villahermosa del Río, Castellón, España. Acopios, 1, 1-51. [ ;]
- Cócera, H., Menor-Salván, C. and Muñoz-Alvarado, R. (2010): Mineralogía de la concesión San Rafael, Villahermosa del Río, Castellón, España. Acopios, 1, 1-51. [ ;]
  • England
    • Leicestershire
      • Stanton under Bardon
UKJMM 26:31-42
  • Scotland
    • Strathclyde
      • Isle of Islay
[J.Russell Soc. 1998:38]
      • Lochgilphead
[J.Russell Soc. 1998:38]
  • Arizona
    • La Paz Co.
      • Trigo Mts
        • Silver District
XRD-analysed as "anatacamite" (later found to be twinned clinoatacamite) by Dr. Anthony Kampf.
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
Raman analyzed at the University of Arizona.
      • Painted Rock Mts
        • Painted Rock District
          • Theba
PXRD analyzed by Tony Kampf; also as "anatacamite" (later found to be twinned clinoatacamite) PXRD analyzed by Tony Kampf; Bruce Murphy Collection
    • Pinal Co.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Raman analyzed at the University of Arizona.
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