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Nantokite

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Formula:
CuCl
System:
Isometric
Colour:
Colourless, white to ...
Lustre:
Adamantine
Hardness:
2 - 2½
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

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
3.AA.05

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
9.1.7.1

9 : NORMAL HALIDES
1 : AX
8.2.1

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu
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http://www.mindat.org/min-2840.html
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Type Occurrence of Nantokite

Year of Discovery:
1868

Physical Properties of Nantokite

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:
3.93 - 4.3 g/cm3 (Measured)    4.22 g/cm3 (Calculated)

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
Max 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:
All elements listed in formula:
Analytical Data:
Alters superficially to paratacamite when exposed in air.

Relationship of Nantokite to other Species

Other Members of Group:
3.AA.05MarshiteCuI
3.AA.05Miersite(Ag,Cu)I
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgI
3.AA.10Tocornalite(Ag,Hg)I
3.AA.15BromargyriteAgBr
3.AA.15ChlorargyriteAgCl
3.AA.20CarobbiiteKF
3.AA.20GriceiteLiF
3.AA.20HaliteNaCl
3.AA.20SylviteKCl
3.AA.20VilliaumiteNaF
3.AA.25SalammoniacNH4Cl
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)
3.AA.30Calomel(Hg22+)Cl2
3.AA.30Kuzminite(Hg22+)(Br,Cl)2
3.AA.30Moschelite(Hg22+)I2
3.AA.35NeighboriteNaMgF3
3.AA.40ChlorocalciteKCaCl3
3.AA.45KolaritePbTeCl2
3.AA.50RadhakrishnaitePbTe3(Cl,S)2
3.AA.55ChallacolloiteKPb2Cl5
3.AA.60HephaistositeTlPb2Cl5
8.2.2TolbachiteCuCl2
8.2.3EriochalciteCuCl2 · 2H2O
8.2.4AtacamiteCu2(OH)3Cl
8.2.5ParatacamiteCu3(Cu,Zn)(OH)6Cl2
8.2.6BotallackiteCu2(OH)3Cl
8.2.7MelanothalliteCu2Cl2O
8.2.8CalumetiteCu(OH,Cl)2 · 2H2O
8.2.9AnthonyiteCu(OH,Cl)2 · 3H2O
8.2.10ClaringbulliteCu4ClF(OH)6
8.2.11MarshiteCuI
8.2.12MitscherlichiteK2CuCl4 · 2H2O
8.2.13PonomareviteK4Cu4Cl10O

Other Names for Nantokite

Name in Other Languages:

Other Information

Special Storage/
Display Requirements:
Unstable in humid air, and transforms slowly into greenish secondary Cu-hydroxchlorides. Alters to paratacamite on exposure.
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 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

Localities for Nantokite

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
 
  • 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 (TL)
 
  • 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
Mineral and/or Locality  
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