Černýite
A valid IMA mineral species
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About Černýite
Formula:
Cu2(Cd,Zn,Fe)SnS4
Colour:
Steel Grey
Lustre:
Metallic
Hardness:
4
Specific Gravity:
4.76 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Named by S.A. Kissin, D.R. Owens, and W.L. Roberts in 1978 in honor of Dr. Petr Černý (1934 - 7 April 2018), Professor of Geology at the University of Manitoba, Canada and an expert in the mineralogy of pegmatites. He discovered the mineral at the Tanco Mine. Pronounced CHÄRNĪ·AIT.
This page provides mineralogical data about Černýite.
Unique Identifiers
Mindat ID:
1210
Long-form identifier:
mindat:1:1:1210:8
GUID
(UUID V4):
(UUID V4):
6307894a-75e0-47c8-833c-1c71b16882d9
IMA Classification of Černýite
Approved
IMA Formula:
Cu2CdSnS4
First published:
1978
Classification of Černýite
2.CB.15a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.2.2
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
6.1.13
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn
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 |
---|---|---|
Čný | 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 Černýite
Metallic
Transparency:
Opaque
Colour:
Steel Grey
Streak:
Black
Hardness:
4 on Mohs scale
Hardness:
VHN50=189 - 210 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
4.76 g/cm3 (Calculated)
Comment:
Density could not be measured due to lack of pure material.
Optical Data of Černýite
Anisotropism:
Very weak in shades of gray
Reflectivity:
Wavelength | R |
---|---|
470nm | 24.6% |
546nm | 23.4% |
589nm | 22.3% |
650nm | 22.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 24.6%.
Chemistry of Černýite
Mindat Formula:
Cu2(Cd,Zn,Fe)SnS4
Crystallography of Černýite
Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2m
Cell Parameters:
a = 5.487 Å, c = 10.828 Å
Ratio:
a:c = 1 : 1.973
Unit Cell V:
326.00 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Anhedral grains to 200 microns.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.167 Å | (100) |
1.939 Å | (70) |
1.662 Å | (50) |
1.954 Å | (40) |
1.639 Å | (40) |
1.770 Å | (30) |
1.257 Å | (30) |
Comments:
Tanco Mine, Manitoba, Canada. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) |
Geological Setting:
Complex zoned pegmatites
Type Occurrence of Černýite
Co-Type Localities:
General Appearance of Type Material:
Very fine intergrowths with kesterite from microscopic to 10x12 cm.
Place of Conservation of Type Material:
University of Manitoba, Winnipeg, Manitoba, Canada, 5159, 5160.
Canadian Geological Survey, Ottawa, Ontario, Canada, 12119.
Royal Ontario Museum, Toronto, Ontario, Canada, M34728–M34730.
Museum of Geology, South Dakota School of Mines, SD, USA, 5098, 5099.
National Museum of Natural History, Washington, D.C., USA, 136924.
Canadian Geological Survey, Ottawa, Ontario, Canada, 12119.
Royal Ontario Museum, Toronto, Ontario, Canada, M34728–M34730.
Museum of Geology, South Dakota School of Mines, SD, USA, 5098, 5099.
National Museum of Natural History, Washington, D.C., USA, 136924.
Geological Setting of Type Material:
Complex pegmatite.
Associated Minerals at Type Locality:
Reference:
Kissin, S.A., Owens, D.R., Roberts, W.L. (1978) Černýite, a copper-cadmium-tin sulfide with the stannite structure. The Canadian Mineralogist: 16: 139-146.
Synonyms of Černýite
Other Language Names for Černýite
Relationship of Černýite to other Species
Member of:
Other Members of this group:
Briartite | Cu2(Fe,Zn)GeS4 | Tet. |
Famatinite | Cu3SbS4 | Tet. 4 2m : I4 2m |
Ferrokësterite | Cu2FeSnS4 | Tet. 4 : I4 |
Hocartite | Ag2(Fe2+,Zn)SnS4 | Tet. 4 2m : I4 2m |
Kësterite | Cu2ZnSnS4 | Tet. 4 : I4 |
Keutschite | Cu2AgAsS4 | Tet. 4 2m : I4 2m |
Kuramite | Cu3SnS4 | Tet. 4 2m : I4 2m |
Luzonite | Cu3AsS4 | Tet. 4 2m : I4 2m |
Omariniite | Cu8Fe2ZnGe2S12 | Orth. 2 2 2 : I2 2 2 |
Permingeatite | Cu3SbSe4 | Tet. 4 2m : I4 2m |
Petrukite | (Cu,Fe,Zn,Ag)3(Sn,In)S4 | Orth. mm2 : Pmn21 |
Pirquitasite | Ag2ZnSnS4 | Tet. 4 : I4 |
Richardsite | Zn2CuGaS4 | Tet. 4 2m : I4 2m |
Stannite | Cu2FeSnS4 | Tet. 4 2m : I4 2m |
Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 | Orth. 2 2 2 : I2 2 2 |
UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 | |
Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 | |
Velikite | Cu2HgSnS4 | Tet. 4 : I4 |
Zincobriartite | Cu2(Zn,Fe)(Ge,Ga)S4 | Tet. 4 2m : I4 2m |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
2.CB. | Agmantinite | Ag2MnSnS4 |
2.CB. | Richardsite | Zn2CuGaS4 |
2.CB. | Gachingite | Au(Te1-xSex) |
2.CB. | Tolstykhite | Au3S4Te6 |
2.CB. | Hanswilkeite | KFeS2 |
2.CB. | Auroselenide | AuSe |
2.CB. | Ruizhongite | (Ag2◻)Pb3Ge2S8 |
2.CB. | Okruginite | Cu2SnSe3 |
2.CB.05a | Coloradoite | HgTe |
2.CB.05a | Hawleyite | CdS |
2.CB.05a | Metacinnabar | HgS |
2.CB.05c | Polhemusite | (Zn,Hg)S |
2.CB.05b | Sakuraiite | (Cu,Zn,Fe)3(In,Sn)S4 |
2.CB.05a | Sphalerite | ZnS |
2.CB.05a | Stilleite | ZnSe |
2.CB.05a | Tiemannite | HgSe |
2.CB.05 | UM1998-15-S:CuFeZn | Cu2Fe3Zn5S10 |
2.CB.05a | Rudashevskyite | (Fe,Zn)S |
2.CB.05a | Ishiharaite | (Cu,Ga,Fe,In,Zn)S |
2.CB.07a | Shenzhuangite | NiFeS2 |
2.CB.07a | Unnamed (Cu-Mn-Sn Sulpide) | Cu2MnSnS4 |
2.CB.10a | Chalcopyrite | CuFeS2 |
2.CB.10a | Eskebornite | CuFeSe2 |
2.CB.10a | Gallite | CuGaS2 |
2.CB.10b | Haycockite | Cu4Fe5S8 |
2.CB.10a | Lenaite | AgFeS2 |
2.CB.10b | Mooihoekite | Cu9Fe9S16 |
2.CB.10b | Putoranite | Cu1.1Fe1.2S2 |
2.CB.10a | Roquesite | CuInS2 |
2.CB.10b | Talnakhite | Cu9(Fe,Ni)8S16 |
2.CB.10a | Laforêtite | AgInS2 |
2.CB.10a | Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 |
2.CB.10a | UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 |
2.CB.10c | Omariniite | Cu8Fe2ZnGe2S12 |
2.CB.15a | Ferrokësterite | Cu2FeSnS4 |
2.CB.15a | Hocartite | Ag2(Fe2+,Zn)SnS4 |
2.CB.15a | Idaite | Cu5FeS6 |
2.CB.15a | Kësterite | Cu2ZnSnS4 |
2.CB.15a | Kuramite | Cu3SnS4 |
2.CB.15b | Mohite | Cu2SnS3 |
2.CB.15a | Pirquitasite | Ag2ZnSnS4 |
2.CB.15a | Stannite | Cu2FeSnS4 |
2.CB.15c | Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 |
2.CB.15a | Velikite | Cu2HgSnS4 |
2.CB.15c | UM2006-11-S:CuFeGeZn | Cu8(Fe,Zn)3Ge2S12 (?) |
2.CB.17a v | Arsenic-bearing Renierite | Cu11GeAsFe4S16 |
2.CB.20 | Chatkalite | Cu6FeSn2S8 |
2.CB.20 | Mawsonite | Cu6Fe2SnS8 |
2.CB.30 | Argyropyrite | near Ag2Fe7S11 |
2.CB.30 | Colusite | Cu13VAs3S16 |
2.CB.30 | Germanite | Cu13Fe2Ge2S16 |
2.CB.30 | Germanocolusite | Cu26V2(Ge,As)6S32 |
2.CB.30 | Nekrasovite | Cu26V2(Sn,As,Sb)6S32 |
2.CB.30 | Stibiocolusite | Cu13V(Sb,Sn,As)3S16 |
2.CB.30 | Ovamboite | Cu20(Fe,Cu,Zn)6W2Ge6S32 |
2.CB.30 | Maikainite | Cu20(Fe,Cu)6Mo2Ge6S32 |
2.CB.30 | Frieseite | Ag2Fe5S8 (?) |
2.CB.35a | Hemusite | Cu6SnMoS8 |
2.CB.35a | Kiddcreekite | Cu6SnWS8 |
2.CB.35a | Polkovicite | (Fe,Pb)3(Ge,Fe)1-xS4 |
2.CB.35a | Renierite | (Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 |
2.CB.35a | Vinciennite | Cu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16 |
2.CB.35a | Morozeviczite | (Pb,Fe)3Ge1-xS4 |
2.CB.35b | Catamarcaite | Cu6GeWS8 |
2.CB.40 | Lautite | CuAsS |
2.CB.42 | Lingbaoite | AgTe3 |
2.CB.45 | Cadmoselite | CdSe |
2.CB.45 | Greenockite | CdS |
2.CB.45 | Wurtzite | (Zn,Fe)S |
2.CB.45 | Rambergite | MnS |
2.CB.45 | Buseckite | (Fe,Zn,Mn)S |
2.CB.45 | Maletoyvayamite | Au3Se4Te6 |
2.CB.47 | Murchisite | Cr5S6 |
2.CB.50 | Zincselenide | ZnSe |
2.CB.50 | Wassonite | TiS |
2.CB.52 | Dzhezkazganite | ReMoCu2PbS6 ? |
2.CB.55a | Cubanite | CuFe2S3 |
2.CB.55b | Isocubanite | CuFe2S3 |
2.CB.60 | Picotpaulite | TlFe2S3 |
2.CB.60 | Raguinite | TlFeS2 |
2.CB.65 | Argentopyrite | AgFe2S3 |
2.CB.65 | Sternbergite | AgFe2S3 |
2.CB.70 | Sulvanite | Cu3VS4 |
2.CB.75 | Vulcanite | CuTe |
2.CB.80 | Empressite | AgTe |
2.CB.85 | Muthmannite | AuAgTe2 |
Other Information
Notes:
Coexisting cernyite and kesterite can be distinguished by etching width 1:1 HNO3. Kesterite is more readily stained by the etchant.
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 Černýite
mindat.org URL:
https://www.mindat.org/min-1210.html
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References for Černýite
Reference List:
Localities for Černýite
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).
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.
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Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada