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Nantokite

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Formula:
CuCl
System:IsometricColour:Colourless, white to ...
Lustre:AdamantineHardness:2 - 2½
Member of:Chlorargyrite Group
Name:For the locality at Nantoko, Copiapó, Chile.


Chlorargyrite Group.

A rare anhydrous copper chloride, known only from arid environments and slags (as tetrahedral crystals). Colourless and transparent when fresh.

Classification of Nantokite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/A.01-10
Nickel-Strunz 10th (pending) edition ID:3.AA.05

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
Dana 8th edition ID:9.1.7.1

9 : NORMAL HALIDES
1 : AX
Hey's CIM Ref.:8.2.1

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu
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Type Occurrence of Nantokite

Type Locality:Carmen Bajo Mine, Nantoko, Copiapó Province, Atacama Region, Chile
Year of Discovery:1868

Physical Properties of Nantokite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:Colourless, white to greyish, greenish
Streak:White
Hardness (Mohs):2 - 2½
Tenacity:Sectile
Cleavage:Distinct/Good
On {011}.
Fracture:Conchoidal
Density (measured):3.93 - 4.3 g/cm3
Density (calculated):4.22 g/cm3

Crystallography of Nantokite

Crystal System:Isometric
Class (H-M):4 3m - Hextetrahedral
Space Group:F4 3m
Cell Parameters:a = 5.407Å
Unit Cell Volume:V 158.08 ų (Calculated from Unit Cell)
Z:4
Morphology:Massive, granular

Optical Data of Nantokite

Type:Isotropic
RI values: n = 1.930(5)
Birefringence:Anomalously anisotropic
Maximum Birefringence:δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:Very High
Comments:On synthetic material.

Chemical Properties of Nantokite

Formula:
CuCl
Essential elements:Cl, Cu
All elements listed in formula:Cl, Cu
Analytical Data:Alters superficially to paratacamite when exposed in air.

Relationship of Nantokite to other Species

Member of:Chlorargyrite Group
Other Members of Group:

- +
Related Minerals - Nickel-Strunz Grouping):

- +
3.AA.05Marshite
CuI
3.AA.05Miersite
(Ag,Cu)I
3.AA.05UM1999-11:I:CuS
Cu(I,S)
3.AA.10Iodargyrite
AgI
3.AA.10Tocornalite
(Ag,Hg)I
3.AA.15Bromargyrite
AgBr
3.AA.15Chlorargyrite
AgCl
3.AA.20Carobbiite
KF
3.AA.20Griceite
LiF
3.AA.20Halite
NaCl
3.AA.20Sylvite
KCl
3.AA.20Villiaumite
NaF
3.AA.25Salammoniac
NH
 
4
Cl
3.AA.25UM1998-03-Cl:Tl
TlCl
3.AA.25Lafossaite
Tl(Cl,Br)
3.AA.30Calomel
(Hg
+
2
)Cl
 
2
3.AA.30Kuzminite
(Hg
+
2
)(Br,Cl)
 
2
3.AA.30Moschelite
(Hg
+
2
)I
 
2
3.AA.35Neighborite
NaMgF
 
3
3.AA.40Chlorocalcite
KCaCl
 
3
3.AA.45Kolarite
PbTeCl
 
2
3.AA.50Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
3.AA.55Challacolloite
KPb
 
2
Cl
 
5
3.AA.60Hephaistosite
TlPb
 
2
Cl
 
5
Related Minerals - Hey's Index Grouping:

- +
8.2.2Tolbachite
CuCl
 
2
8.2.3Eriochalcite
CuCl
 
2
· 2H
 
2
O
8.2.4Atacamite
Cu
 
2
(OH)
 
3
Cl
8.2.5Paratacamite
Cu
 
3
(Cu,Zn)(OH)
 
6
Cl
 
2
8.2.6Botallackite
Cu
 
2
(OH)
 
3
Cl
8.2.7Melanothallite
Cu
 
2
Cl
 
2
O
8.2.8Calumetite
Cu(OH,Cl)
 
2
· 2H
 
2
O
8.2.9Anthonyite
Cu(OH,Cl)
 
2
· 3H
 
2
O
8.2.10Claringbullite
Cu
 
4
(OH)
 
7
Cl · nH
 
2
O
8.2.11Marshite
CuI
8.2.12Mitscherlichite
K
 
2
CuCl
 
4
· 2H
 
2
O
8.2.13Ponomarevite
K
 
4
Cu
 
4
Cl
 
10
O

Other Names for Nantokite

Synonyms:
Kupferchlorür
Other Languages:
German:Nantokit
Russian:Нантокит
Spanish:Nantokita
Nantoquita

Other Information

Special Storage/
Display Requirements:
Unstable in humid air, and transforms slowly into greenish secondary Cu-hydroxchlorides. Alters to paratacamite on exposure.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Nantokite

Reference List:

- +
Breithaupt (1868) B.H. Zeitung: 27: 3.

Breithaupt (1872) Jb. Min.: 814.

Armstrong ad Carmichael (1894) Proceedings of the Royal Society of New South Wales: 28: 96.

Wyckoff and Posnjak (1922) Journal of theAmerican Chemical Society: 44: 30.

Barth and Lunde (1925) Norsk Geol. Tidsskr.: 8: 281.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 18-19.

Internet Links for Nantokite

Search Engines:
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  • External Links:
  • Look for Nantokite on Webmineral
  • Look for Nantokite on Athena Mineralogy
  • Look for Nantokite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Nantokite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
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  • Localities for Nantokite

    The 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. ? 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
     
    • New South Wales
      • Yancowinna Co.
    Handbook of Mineralogy
    Mineralogical Magazine 1894 10 : 326-327
    • Queensland
      • Mount Isa - Cloncurry area
        • Cloncurry District
          • Cloncurry
    Handbook of Mineralogy
    Australian Journal of Mineralogy Volume 5 Number 2
    Handbook of Mineralogy
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Nantoko
    Dana 6 (1892): 154; 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, John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 18.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Ústí Region
        • Krušné Hory Mts (Erzgebirge)
          • Krupka (Graupen)
            • Steinknochen area (Lux vein)
    Lapis 23(4), 18-34 (1998)
    Germany
     
    • Saxony-Anhalt
      • Mansfeld Basin
        • Hettstedt
          • Copper-Silver smelter (Gottesbelohnung smelter; slag locality)
    Mineralien Welt 15 Jg.Heft 2 März-April 2004 and Mineralien Welt 19Jg Heft1 Jan -Febr, 2008 Hoorst Knoll
    Greece
     
    • Aegean Islands Department (Aiyaíon)
      • Kykládes Prefecture
        • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
          • Serifos Island (Seriphos)
            • Avissalos (Avyssalos; Avessalos; Aghriomelisa Mountain)
    Fritz Schreiber collection (analysed by U. Kolitsch)
    India
     
    • Madhya Pradesh
      • Balaghat District
        • Baihar Tehsil
          • Padritola
    Singer, D.A., Berger, V.I., and Moring, B.C. (2008): US Geological Survey Open-File Report 2008-1155.
    Italy
     
    • Campania
      • Naples Province
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
    • Liguria
      • Genova Province
        • Genova
          • Varenna Valley
    Rivista Mineralogica Italiana, 2 (Avril/Juin), 175-188.
    • Tuscany
      • Livorno Province
        • Campiglia Marittima
    http://www.comune.pisa.it/apsn/Articoli/Scorie/Capattoli.htm
    C.Boutry
          • Sassetta
    Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
        • Piombino
    Cerutti, G. and Preite, D. (1995): Mineralien der etruskischen Schlacken von Baratti, Toskana. Lapis, 20 (4), 13-18; 50 (in German).
    Luigi Chiappino data
    Kazakhstan
     
    • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
      • Dzhezkazgan (Zhezqazghan)
    Handbook of Mineralogy; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
    Mexico
     
    • Durango
      • Mun. de Mapimí
        • Mapimí
    Rocks & Min.: 56:247.
    • Tamaulipas
      • Mun. de Villagrán
        • San José
    Panczner (1987):281.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Djebel Saghro (Jbel Saghro)
          • Bou Skour district
    Georges FAVREAU collection
    Poland
     
    • Małopolskie
      • Chrzanów District
    Coppola, V., Boni, M., Gilg, A., and Strzelska-Smakowska, B. (2009): Mineralium Deposita 44, 559-580.
        • Trzebinia
    Coppola, V., Boni, M., Gilg, A., and Strzelska-Smakowska, B. (2009): Mineralium Deposita 44, 559-580.
    • Upper Silesia (Śląskie)
    Coppola, V., Boni, M., Gilg, A., and Strzelska-Smakowska, B. (2009): Mineralium Deposita 44, 559-580.
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
    Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
    Spain
     
    • Andalusia
      • Almería
        • 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).
    UK
     
    • England
      • Cornwall
        • St Just District
          • St Just
            • Trewellard
    [Golley & Williams, 1995, 44 - "Cornish Mineral Reference Manual"]
    USA
     
    • Arizona
      • Cochise Co.
        • Mule Mts
          • Warren District
            • Bisbee
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 310; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 398; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
    • Connecticut
      • Fairfield Co.
        • Stamford
    Henderson, William, A., Jr. (1967), A Copper Analog of Laurium, Greece. Rocks & Minerals: 42(5): 273-276.
    • Michigan
      • Ontonagon Co.
        • Mass City
    Rocks & Min.:58:112.
    • New Mexico
      • Grant Co.
    Handbook of Mineralogy
    • New York
      • St. Lawrence Co.
        • Balmat-Edwards Zinc District
    Rocks & Minerals (2008) Volume 83:3 Pages: 224 - 239
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