Kutinaite
A valid IMA mineral species
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About Kutinaite
Jan Kutina
Formula:
Ag6Cu14As7
Bindi & Makovicky (2015) suggest the formula (K,Tl)0.25Cu14Ag6As6.75.
Originally assumed to be Cu2AgAs.
Originally assumed to be Cu2AgAs.
Colour:
Silver gray
Lustre:
Metallic
Hardness:
4½
Specific Gravity:
8.38
Crystal System:
Isometric
Name:
Named in 1970 by J. Hak, Z. Johan, and Brian J. Skinner in honor of Dr. Jan Kutina (1924, Prague - 14 August 2008, Maryland, USA), geologist. He held academic positions at the Charles University in Prague and in the USA and Japan. His specialty was ore deposits and metallogenic research.
Restudy of the type material is necessary (Bindi & Makovicky, 2015).
Unique Identifiers
Mindat ID:
2298
Long-form identifier:
mindat:1:1:2298:5
Similar Names
| Coutinite | A synonym of Lanthanite-(Nd) | |
| Katanite | A valid IMA mineral species - pending publication | Ba3NbFe3Si2O14 |
| Mutinaite | A valid IMA mineral species | Na3Ca4Si85Al11O192 · 60H2O |
IMA Classification of Kutinaite
Approved
Approval year:
1969
First published:
1970
Classification of Kutinaite
2.AA.25
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2.2.2.2
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
1.40
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Kti | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Kutinaite
Metallic
Transparency:
Opaque
Colour:
Silver gray
Hardness:
4½ on Mohs scale
Hardness:
VHN25=237 - 270 kg/mm2 - Vickers
Tenacity:
Malleable
Density:
8.38(7) g/cm3 (Measured) 8.400 g/cm3 (Calculated)
Comment:
Measured on synthetic material
Optical Data of Kutinaite
Type:
Isotropic
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 400nm | 49.6% |
| 440nm | 48.0% |
| 480nm | 45.6% |
| 520nm | 43.5% |
| 560nm | 42.0% |
| 600nm | 41.1% |
| 640nm | 40.5% |
| 680nm | 40.5% |
| 700nm | 40.9% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 49.6%.
Colour in reflected light:
grayish white to pale blue-gray
Chemistry of Kutinaite
Mindat Formula:
Ag6Cu14As7
Bindi & Makovicky (2015) suggest the formula (K,Tl)0.25Cu14Ag6As6.75.
Originally assumed to be Cu2AgAs.
Bindi & Makovicky (2015) suggest the formula (K,Tl)0.25Cu14Ag6As6.75.
Originally assumed to be Cu2AgAs.
Element Weights:
Elements listed:
Crystallography of Kutinaite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Cell Parameters:
a = 11.78079(2) Å
Unit Cell V:
1,635.02 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: Pm3m. synthetic
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0005793 | Kutinaite | Karanovic L, Poleti D, Makovicky E, Balic-Zunic T, Makovicky M (2002) The crystal structure of synthetic kutinaite, Cu14Ag6As7 The Canadian Mineralogist 40 1437-1449 |  | 2002 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.259 Å | (100) |
| 2.078 Å | (100) |
| 2.702 Å | (90) |
| 2.398 Å | (80) |
| 1.991 Å | (70) |
| 1.959 Å | (70) |
| 1.776 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Kutinaite
Place of Conservation of Type Material:
1) Charles University, Prague, Czech Republic, 14428.
2) Yale University, New Haven, Connecticut, USA.
2) Yale University, New Haven, Connecticut, USA.
Associated Minerals at Type Locality:
Synonyms of Kutinaite
Other Language Names for Kutinaite
Related Minerals - Strunz-mindat Grouping
| 2.AA. | Trigodomeykite | Cu3-xAs |
| 2.AA.10b | Domeykite | Cu3As |
| 2.AA.10a | Algodonite | (Cu1-xAsx) |
| 2.AA.10d | Koutekite | Cu5As2 |
| 2.AA.15 | Novákite | (Cu,Ag)21As10 |
| 2.AA.20 | Cuprostibite | Cu2(Sb,Tl) |
| 2.AA.30 | Allargentum | (Ag1-xSbx) |
| 2.AA.35 | Dyscrasite | Ag3Sb |
| 2.AA.40 | Maldonite | Au2Bi |
| 2.AA.45 | Stistaite | SnSb |
| 2.AA.50 | Zaccariniite | RhNiAs |
| 2.AA.55 | Dienerite | Ni3As |
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.
Internet Links for Kutinaite
mindat.org URL:
https://www.mindat.org/min-2298.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Kutinaite
Reference List:
Hak, J., Johan, Z., Skinner, Brian J. (1970) Kutinaite; a new copper-silver arsenide mineral from Cerny Dul, Czechoslovakia. American Mineralogist, 55 (7-8) 1083-1087
Johan, Z. (1985) The Černý Důl deposit (Czechoslovakia): An example of Ni-, Fe-, Ag-, Cu-arsenide mineralization with extremely high activity of arsenic; new data on paxite, novakite and kutinaite. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 34 (3) 167-182 doi:10.1007/bf01082960
Localities for Kutinaite
Showing 10 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Harris et al. (1985) |
Czech Republic | |
| Sejkora et al. (2022) |
| Hak et al. (1970) +3 other references |
France | |
| Picot et al. (1978) |
| Picot et al. (1978) | |
| |
Germany | |
| Belendorff (1986) +1 other reference |
Iran | |
| Anthony et al. (1990) |
| Khoshnoodi et al. (2025) | |
Kazakhstan | |
| Sal'kov +1 other reference |
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Černý Důl, Trutnov District, Hradec Králové Region, Czech Republic