Nantokite
A valid IMA mineral species - grandfathered
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About Nantokite
Formula:
CuCl
Colour:
Colourless, white to greyish, greenish
Lustre:
Adamantine
Hardness:
2 - 2½
Specific Gravity:
3.93 - 4.3
Crystal System:
Isometric
Member of:
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.
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 Identifiers
Mindat ID:
2840
Long-form identifier:
mindat:1:1:2840:6
GUID
(UUID V4):
(UUID V4):
917e4cad-8ddb-49d2-b606-48cfebfa8736
IMA Classification of Nantokite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1868
Type description reference:
Classification of Nantokite
3.AA.05
3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
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
9 : NORMAL HALIDES
1 : AX
8.2.1
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Ntk | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Nantokite
Adamantine
Transparency:
Transparent
Colour:
Colourless, white to greyish, greenish
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Sectile
Cleavage:
Distinct/Good
On {011}.
On {011}.
Fracture:
Conchoidal
Density:
3.93 - 4.3 g/cm3 (Measured) 4.22 g/cm3 (Calculated)
Optical Data of Nantokite
Type:
Isotropic
RI values:
n = 1.930(5)
Birefringence:
Anomalously anisotropic
Surface Relief:
Very High
Comments:
On synthetic material.
Chemistry of Nantokite
Mindat Formula:
CuCl
Elements listed:
Crystallography of Nantokite
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
F4 3m
Cell Parameters:
a = 5.407 Å
Unit Cell V:
158.08 Ă
Âł (Calculated from Unit Cell)
Z:
4
Morphology:
Massive, granular; small white tetrahedra.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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CIF File Best | x | y | z | a | b | c
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0011520 | Nantokite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 85-237 | 1963 | 0 | 293 | ||
0017906 | Nantokite | Wyckoff R, Posnjak E (1922) The Crystal Structures of the Cuprous Halides _cod_database_code 1010991 Journal of the American Chemical Society 44 30-36 | 1922 | 0 | 293 | ||
0015185 | Nantokite | Hull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-5885 | 1994 | 0 | 293 | ||
0015186 | Nantokite | Hull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-5885 | 1994 | 0 | 293 | ||
0015187 | Nantokite | Hull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-5885 | 1994 | 0 | 293 | ||
0015188 | Nantokite | Hull S, Keen D A (1994) High-pressure polymorphism of the copper(I) halides: A neutron-diffraction study to ~10 GPa Physical Review B50 5868-5885 | 1994 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.127 Ă | (100) |
1.915 Ă | (55) |
1.633 Ă | (30) |
1.243 Ă | (10) |
2.710 Ă | (8) |
1.1054 Ă | (8) |
1.354 Ă | (6) |
Comments:
Synthetic
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest 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 Nantokite
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 Nantokite
Other Language Names for Nantokite
Relationship of Nantokite to other Species
Member of:
Other Members of this group:
Bromargyrite | AgBr | Iso. m3m (4/m 3 2/m) : Fm3m |
Chlorargyrite | AgCl | Iso. m3m (4/m 3 2/m) : Fm3m |
Marshite | CuI | Iso. 4 3m : F4 3m |
Miersite | (Ag,Cu)I | Iso. 4 3m : F4 3m |
Common Associates
Associated Minerals Based on Photo Data:
8 photos of Nantokite associated with Cuprite | Cu2O |
7 photos of Nantokite associated with Copper | Cu |
5 photos of Nantokite associated with Atacamite | Cu2(OH)3Cl |
5 photos of Nantokite associated with Paratacamite | Cu3(Cu,Zn)(OH)6Cl2 |
2 photos of Nantokite associated with Limonite | |
1 photo of Nantokite associated with Malachite | Cu2(CO3)(OH)2 |
1 photo of Nantokite associated with Gypsum | CaSO4 ¡ 2H2O |
1 photo of Nantokite associated with Brochantite | Cu4(SO4)(OH)6 |
1 photo of Nantokite associated with Goethite | Îą-Fe3+O(OH) |
Related Minerals - Strunz-mindat Grouping
3.AA. | Brontesite | (NH4)3PbCl5 |
3.AA.05 | Marshite | CuI |
3.AA.05 | Miersite | (Ag,Cu)I |
3.AA.05 | UM1999-11:I:CuS | Cu(I,S) |
3.AA.10 | Iodargyrite | AgI |
3.AA.10 | Tocornalite | (Ag,Hg)I |
3.AA.15 | Bromargyrite | AgBr |
3.AA.15 | Chlorargyrite | AgCl |
3.AA.20 | Carobbiite | KF |
3.AA.20 | Griceite | LiF |
3.AA.20 | Halite | NaCl |
3.AA.20 | Sylvite | KCl |
3.AA.20 | Villiaumite | NaF |
3.AA.25 | Salammoniac | NH4Cl |
3.AA.25 | UM1998-03-Cl:Tl | TlCl |
3.AA.25 | Lafossaite | Tl(Cl,Br) |
3.AA.25 | Nataliyamalikite | TlI |
3.AA.30 | Calomel | [Hg2]2+Cl2 |
3.AA.30 | Kuzminite | [Hg2]2+(Br,Cl)2 |
3.AA.30 | Moschelite | [Hg2]2+I2 |
3.AA.35 | Neighborite | NaMgF3 |
3.AA.35 | Parascandolaite | KMgF3 |
3.AA.40 | Chlorocalcite | KCaCl3 |
3.AA.40 | Javorieite | KFeCl3 |
3.AA.45 | Kolarite | PbTeCl2 |
3.AA.50 | Radhakrishnaite | PbTe3(Cl,S)2 |
3.AA.55 | Challacolloite | KPb2Cl5 |
3.AA.60 | Hephaistosite | TlPb2Cl5 |
3.AA.90 | Pseudocotunnite | K2PbCl4 |
Other Information
Special Storage/
Display Requirements:
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 Nantokite
mindat.org URL:
https://www.mindat.org/min-2840.html
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References for Nantokite
Localities for Nantokite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
Atlantic Ocean | |
| Fouquet et al. (1993) |
Australia | |
| Mineralogical Society of America - ... |
Mineralogical Magazine 1894 10 : 326-327 | |
| Mineralogical Society of America - ... +1 other reference |
Australian Journal of Mineralogy Volume ... | |
| Mineralogical Society of America - ... |
| MacLeod (1991) |
Chile (TL) | |
| Dana 6 (1892) +1 other reference |
China | |
| Yi et al. (2017) |
Czech Republic | |
| Sejkora (1998) |
Germany | |
| Mineralien Welt 15 Jg.Heft 2 ... |
Ko Jansen +2 other references | |
Greece | |
| Fritz Schreiber collection (analysed by U. Kolitsch) |
India | |
| Singer et al. (2008) |
Italy | |
| ¡ Maletto et al. (2016) |
| AA. VV. |
| Rivista Mineralogica Italiana (Avril/Juin) |
| "Lithothek der MĂźnchener Micromounter" ... |
Ko Jansen +2 other references | |
| C.Boutry |
www.comune.pisa.it (2000) | |
| Franzini et al. (1992) +3 other references |
| Jansen et al. (1998) |
| Luigi Chiappino data |
Kazakhstan | |
| Mineralogical Society of America - ... +1 other reference |
Mexico | |
| Rocks & Min.: 56:247. |
| Panczner (1987) |
Morocco | |
| Georges Favreau collection |
Pakistan | |
| Ahmed (1991) |
Poland | |
| Coppola et al. (2009) |
Coppola et al. (2009) | |
| Coppola et al. (2009) |
Russia | |
| Cesnokov et al. (1998) |
Spain | |
| in Spanish version (Revista de Minerales) +1 other reference |
UK | |
| Golley et al. (1995) |
USA | |
| Graeme (1993) +1 other reference |
| Graeme (1993) +2 other references |
| PXRD by John Attard |
| Henderson et al. (1967) |
| Williams (1962) +1 other reference |
| Mineralogical Society of America - ... |
| Collection of Patrick Haynes. Found in ... |
| Rocks & Minerals (2008) |
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Baratti slag locality, Piombino, Livorno Province, Tuscany, Italy