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Nantokite

A valid IMA mineral species - grandfathered
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About NantokiteHide

Formula:
CuCl
Colour:
Colourless, white to greyish, greenish
Lustre:
Adamantine
Hardness:
2 - 2½
Specific Gravity:
3.93 - 4.3
Crystal System:
Isometric
Name:
For the locality at Nantoko, CopiapĂł, Chile.
Chlorargyrite Group.

A rare anhydrous copper chloride, known only from arid environments and slags (as tetrahedral crystals). Colourless and transparent when fresh. Alters superficially to paratacamite (or rather clinoatacamite?) when exposed to air.


Unique IdentifiersHide

Mindat ID:
2840
Long-form identifier:
mindat:1:1:2840:6
GUID
(UUID V4):
917e4cad-8ddb-49d2-b606-48cfebfa8736

IMA Classification of NantokiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First published:
1868

Classification of NantokiteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
NtkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of NantokiteHide

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

Optical Data of NantokiteHide

Type:
Isotropic
RI values:
n = 1.930(5)
Birefringence:
Anomalously anisotropic
Surface Relief:
Very High
Comments:
On synthetic material.

Chemistry of NantokiteHide

Mindat Formula:
CuCl

Crystallography of NantokiteHide

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

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011520NantokiteWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 85-23719630293
0017906NantokiteWyckoff R, Posnjak E (1922) The Crystal Structures of the Cuprous Halides _cod_database_code 1010991 Journal of the American Chemical Society 44 30-3619220293
0015185NantokiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015186NantokiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015187NantokiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
0015188NantokiteHull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-588519940293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.127 Å(100)
1.915 Å(55)
1.633 Å(30)
1.243 Å(10)
2.710 Å(8)
1.1054 Å(8)
1.354 Å(6)
Comments:
Synthetic

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45b : [Other oxidized fumarolic minerals]
47g : [Halogen-bearing surface weathering minerals]
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
50 : Coal and/or oil shale minerals<0.36
Stage 10b: Anthropogenic minerals<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)
56 : Slag and smelter minerals (see also #51 and #55)

Type Occurrence of NantokiteHide

Place of Conservation of Type Material:
Mining Academy, Freiberg, Germany, 12012.
Reference:
Breithaupt, J.F.A. (1868) Nantokit, ein neues Mineral. Berg- und Hßttenmännische Zeitung: 27: 3-3.

Synonyms of NantokiteHide

Other Language Names for NantokiteHide

Relationship of Nantokite to other SpeciesHide

Other Members of this group:
BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
MarshiteCuIIso. 4 3m : F4 3m
Miersite(Ag,Cu)IIso. 4 3m : F4 3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
8 photos of Nantokite associated with CupriteCu2O
7 photos of Nantokite associated with CopperCu
5 photos of Nantokite associated with AtacamiteCu2(OH)3Cl
5 photos of Nantokite associated with ParatacamiteCu3(Cu,Zn)(OH)6Cl2
2 photos of Nantokite associated with Limonite
1 photo of Nantokite associated with MalachiteCu2(CO3)(OH)2
1 photo of Nantokite associated with GypsumCaSO4 ¡ 2H2O
1 photo of Nantokite associated with BrochantiteCu4(SO4)(OH)6
1 photo of Nantokite associated with GoethiteÎą-Fe3+O(OH)

Related Minerals - Strunz-mindat GroupingHide

3.AA.Brontesite(NH4)3PbCl5Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.05MarshiteCuIIso. 4 3m : F4 3m
3.AA.05Miersite(Ag,Cu)IIso. 4 3m : F4 3m
3.AA.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.10Tocornalite(Ag,Hg)IHex.
3.AA.15BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
3.AA.15ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20CarobbiiteKFIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20VilliaumiteNaFIso. m3m (4/m 3 2/m) : Fd3m
3.AA.25SalammoniacNH4ClIso. m3m (4/m 3 2/m)
3.AA.25UM1998-03-Cl:TlTlCl
3.AA.25LafossaiteTl(Cl,Br)Iso. m3m (4/m 3 2/m) : Pm3m
3.AA.25NataliyamalikiteTlIOrth. mmm (2/m 2/m 2/m) : Cmcm
3.AA.30Calomel[Hg2]2+Cl2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.30Kuzminite[Hg2]2+(Br,Cl)2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.30Moschelite[Hg2]2+I2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.35NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)
3.AA.35ParascandolaiteKMgF3Iso. m3m (4/m 3 2/m) : Pm3m
3.AA.40ChlorocalciteKCaCl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.40JavorieiteKFeCl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.45KolaritePbTeCl2Orth.
3.AA.50RadhakrishnaitePbTe3(Cl,S)2Tet.
3.AA.55ChallacolloiteKPb2Cl5Mon. 2/m : P21/b
3.AA.60HephaistositeTlPb2Cl5Mon. 2/m : P21/b
3.AA.90PseudocotunniteK2PbCl4Orth.

Other InformationHide

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.

Internet Links for NantokiteHide

References for NantokiteHide

Localities for NantokiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Atlantic Ocean
 
  • Mid-Atlantic Ridge complex
Fouquet et al. (1993)
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
Mineralogical Society of America - ...
Mineralogical Magazine 1894 10 : 326-327
  • Queensland
    • Cloncurry Shire
      • Cloncurry
Mineralogical Society of America - ... +1 other reference
Australian Journal of Mineralogy Volume ...
      • Selwyn District
Mineralogical Society of America - ...
  • Western Australia
    • Exmouth Shire
MacLeod (1991)
Chile (TL)
 
  • Atacama
    • CopiapĂł Province
      • Tierra Amarilla
        • Candelaria Copper mining complex
Dana 6 (1892) +1 other reference
China
 
  • Qinghai
    • Haixi Mongol and Tibetan Autonomous Prefecture
      • Golmud City (Ge'ermu Co.)
Yi et al. (2017)
Czech Republic
 
  • ÚstĂ­ nad Labem Region
    • Teplice District
      • Krupka
        • Steinknochen area
Sejkora (1998)
Germany
 
  • Saxony-Anhalt
    • Mansfeld-SĂźdharz
      • Mansfeld
Mineralien Welt 15 Jg.Heft 2 ...
Ko Jansen +2 other references
Greece
 
  • South Aegean
    • Milos
      • Serifos Island
        • Avissalos
Fritz Schreiber collection (analysed by U. Kolitsch)
India
 
  • Madhya Pradesh
    • Jabalpur Division
      • Balaghat District
        • Baihar Tehsil
          • Malanjkand
Singer et al. (2008)
Italy
 
  • Aosta Valley
    • Brusson
¡ Maletto et al. (2016)
  • Campania
    • Naples
AA. VV.
  • Liguria
    • Genoa
      • Genoa
        • Varenna Valley
Rivista Mineralogica Italiana (Avril/Juin)
  • Tuscany
    • Grosseto Province
      • Massa Marittima
        • Valpiana - Castello della Marsiliana area slag sites
"Lithothek der MĂźnchener Micromounter" ...
Ko Jansen +2 other references
    • Livorno Province
      • Campiglia Marittima
C.Boutry
www.comune.pisa.it (2000)
      • Piombino
Franzini et al. (1992) +3 other references
      • Sassetta
        • Canina Valley
Jansen et al. (1998)
      • Suvereto
Luigi Chiappino data
Kazakhstan
 
  • Karaganda Region
Mineralogical Society of America - ... +1 other reference
Mexico
 
  • Durango
    • MapimĂ­ Municipality
      • MapimĂ­
Rocks & Min.: 56:247.
  • Tamaulipas
    • VillagrĂĄn Municipality
      • San JosĂŠ
Panczner (1987)
Morocco
 
  • Drâa-Tafilalet Region
    • Zagora Province
      • Agdz Cercle
        • Bou Skour mining district
Georges Favreau collection
Pakistan
 
  • Khyber Pakhtunkhwa Province
    • Charsadda District
Ahmed (1991)
Poland
 
  • Lesser Poland Voivodeship
    • ChrzanĂłw County
      • Gmina Trzebinia
Coppola et al. (2009)
Coppola et al. (2009)
  • Silesian Voivodeship
Coppola et al. (2009)
Russia
 
  • Chelyabinsk Oblast
Cesnokov et al. (1998)
Spain
 
  • Andalusia
    • AlmerĂ­a
      • HuĂŠrcal-Overa
        • Cuesta Alta
          • Cerro Minado Mines
in Spanish version (Revista de Minerales) +1 other reference
UK
 
  • England
    • Cornwall
      • St Just
        • Trewellard
Golley et al. (1995)
USA
 
  • Arizona
    • Cochise County
      • Bisbee
Graeme (1993) +1 other reference
        • Hendricks Gulch
Graeme (1993) +2 other references
  • Colorado
    • San Juan County
      • Eureka Mining District
        • Gladstone
          • Bonita Peak
PXRD by John Attard
  • Connecticut
    • Fairfield County
      • Stamford
Henderson et al. (1967)
  • Michigan
    • Ontonagon County
      • Mass City
Williams (1962) +1 other reference
  • New Mexico
    • Grant County
Mineralogical Society of America - ...
    • Socorro County
      • Magdalena Mining District
Collection of Patrick Haynes. Found in ...
  • New York
    • St. Lawrence County
      • Balmat-Edwards Zinc Mining District
Rocks & Minerals (2008)
 
Mineral and/or Locality  
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