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Černýite, Stannite

Grain of cernyite-stannite in chalcopyrite. The cernyite occurs as small, <200 micron grains, in the stannite. FOV 1mm. Brent Thorne specimen and photograph; Locality: Tanco Mine, Bernic Lake, Lac-...

Brent Thorne

Contribution: Stefan 2016-11-25

Locality: Tanco-Pegmatit / Bernic-See / Lac-du-Bonnet-Gebiet / Manitoba / Kanada

Collectors Summary

Color

stahlgrau-metallisch

Streak color

schwarz

Lustre

Metallglanz

Hardness (Mohs)

Solubility

++ HNO₃ 1:1

Crystal System

tetragonal, I42m

Additional information / Summary

Cernyit / Černýite

Chemism

Chemical formula

Cu₂CdSnS₄

Chemical composition

Cadmium, Kupfer, Zinn, Schwefel

Unit weight: 486.4771 u; Number of atoms in the formula: 8

Info

Empirical formula:

Cu₂CdSnS₄

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Sulfur	S	26.37	4	50.00	32.0655000	128.2620000
Copper	Cu	26.13	2	25.00	63.5463000	127.0926000
Cadmium	Cd	23.11	1	12.50	112.4118000	112.4118000
Tin	Sn	24.40	1	12.50	118.7107000	118.7107000

Search for minerals with similar chemistry

Analysis wt%

Cu : 28.10, Fe : 3.60, Zn : 4.90, Cd : 9.30, Sn : 26.30, S : 28.50 (Ref: Canadian Mineralogist 87)

Strunz 9th edition incl. updates

2.CB.15

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
B: mit Zink (Zn), Eisen (Fe), Kupfer (Cu), Silber (Ag), usw.
15:Stannit-Gruppe

Lapis Classification

II/C.06-090

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
6: Stannit-Gruppe

Classification by Hölzel

2.CB.320

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
3: Stannite-Group

Hey's Chemical Index of Minerals

06.01.13

06: Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
01: Sulphostannates and other sulfides containing Sn

Dana 8th edition

02.09.02.02

02: Sulfide Minerals
09: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
02: Stannite Group (Tetragonal: I-42m) A2BCS type

IMA status

anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

Stannite group

Optical Properties

Color	stahlgrau-metallisch
Streak color	schwarz
Change in color	mittelgrau in reflektiertem Licht
Lustre	Metallglanz
Pleochroism	unmerklich
Anisotropism	Sehr schwach in Grautönen
Reflectivity: (Lambda nm) ↓, ↑, Ø	(470) 24.6, 25.5, 25.1 (546) 23.4, 25.6, 24.5 (589) 22.3, 25.0, 23.7 (650) 22.7, 24.3, 23.5

Reflectivity Ø	24.18

Crystallography

Crystal System	tetragonal
Class (H-M)	42m
Space Group number	121
Space Group	I42m
Cell parameters a (Å)	5.51
Cell parameters b (Å)	-
Cell parameters c (Å)	10.84
Cell parameters a/b or c/a	1.967
Cell parameters c/b	-
Cell parameters α	90°
Cell parameters β	90°
Cell parameters γ	90°
Z	2
Volumne (Å³)	329.103
X-Ray Powder Diffraction

Crystals 3D

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Crystal Structure 3D

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Physical Properties

Hardness (Mohs)	4
VHN (Hardness Vickers)	200 (50g)
Density (g/cm³)	4.70 (berechnet)
	4.909 ( ρ calc. Mineralienatlas )
Instability	++ HNO₃ 1:1

(Co-)Type locality

USA /South Dakota /Pennington Co./Keystone District /Keystone /Hugo Mine

Kanada /Manitoba /Lac-du-Bonnet-Gebiet /Bernic-See /Tanco-Pegmatit

Type material

University of Manitoba, Winnepeg, Kanada

Canadian Geological Survey, Ottawa, Kanada

Royal Ontario Museum, Toronto, Kanada

Museum of Geology, South Dakota School of Mines, USA

National Museum of Natural History, Washington, D.C., USA

Collection number of type material

5159, 5160 (Winnepeg); 12119 (Ottawa); M34728–M34730 (Toronto); 5098, 5099 (South Dakota); 136924 (W

Preface

Name from	Dr. Petr Černý (1934- ), Tschechisch-Kanadischer Mineraloge, spezialisiert auf Pegmatite, Universität von Manitoba, Winnipeg, Kanada.
Author (Name, Year)	Kissin et al., 1978

References

Strunz Mineralogical Tables 9. Edition

American Mineralogist: 64: 653.

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Idaite	Cu₃FeS₄ tetragonal : 42m : I42m	2.CB.15
Mohite	Cu₂SnS₃ monoklin : m : Cc	2.CB.15
Černýite	Cu₂CdSnS₄ tetragonal : 42m : I42m	2.CB.15
Kuramite	Cu₃SnS₄ tetragonal : 42m : I42m	2.CB.15
Stannite	Cu₂FeSnS₄ tetragonal : 42m : I42m	2.CB.15
Velikite	Cu₂(Hg,Zn)SnS₄ tetragonal : 4 : I4	2.CB.15
Hocartite	Ag₂FeSnS₄ tetragonal : 42m : I42m	2.CB.15
Keutschite	Cu₂AgAsS₄ tetragonal : 42m : I42m	2.CB.15
Kësterite	Cu₂(Zn,Fe)SnS₄ tetragonal : 4 : I4	2.CB.15
Stannoidite	Cu₈(Fe,Zn)₃Sn₂S₁₂ orthorhombisch : 222 : I222	2.CB.15
Pirquitasite	Ag₂ZnSnS₄ tetragonal : 42m, 4 : I42m, I4	2.CB.15
Ferrokësterite	Cu₂FeSnS₄ tetragonal : 4 : I4	2.CB.15
Richardsite	Zn₂CuGaS₄ tetragonal : 42m : I42m	2.CB.15
Omariniite	Cu₈Fe₂ZnGe₂S₁₂ orthorhombisch : 222 : I222	2.CB.15c

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Luzonite	Cu₃AsS₄ tetragonal : 42m : I42m	II/C.06-010
Famatinite	Cu₃SbS₄ tetragonal : 42m : I42m	II/C.06-020
Permingeatite	Cu₃SbSe₄ tetragonal : 42m : I42m	II/C.06-030
Briartite	Cu₂(Zn,Fe)GeS₄ tetragonal : 42m : I42m	II/C.06-040
Barquillite	Cu₂(Cd,Fe)GeS₄ tetragonal : 42m : I42m	II/C.06-045
Kuramite	Cu₃SnS₄ tetragonal : 42m : I42m	II/C.06-050
Stannite	Cu₂FeSnS₄ tetragonal : 42m : I42m	II/C.06-060
Ferrokësterite	Cu₂FeSnS₄ tetragonal : 4 : I4	II/C.06-070
Kësterite	Cu₂(Zn,Fe)SnS₄ tetragonal : 4 : I4	II/C.06-080
Černýite	Cu₂CdSnS₄ tetragonal : 42m : I42m	II/C.06-090
Velikite	Cu₂(Hg,Zn)SnS₄ tetragonal : 4 : I4	II/C.06-100
Hocartite	Ag₂FeSnS₄ tetragonal : 42m : I42m	II/C.06-110
Pirquitasite	Ag₂ZnSnS₄ tetragonal : 42m, 4 : I42m, I4	II/C.06-120
Richardsite	Zn₂CuGaS₄ tetragonal : 42m : I42m	II/C.06-125
Sakuraiite	(Cu,Zn,Fe)₃(In,Sn)S₄ kubisch	II/C.06-130
Petrukite	(Cu,Ag)₂(Fe,Zn)(Sn,In)S₄ orthorhombisch : mm2 : Pmn2₁	II/C.06-140
Rhodostannite	(Cu,Ag)₂FeSn₃S₈ tetragonal : 4/m : I4₁/a	II/C.06-150
Toyohaite	Ag₂FeSn₃S₈ tetragonal : 4/m : I4₁/a	II/C.06-160

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

'Plumbostannite'	Pb₂Fe₂Sn₂Sb₂S₁₁	2.CB.3
Stannite	Cu₂FeSnS₄ tetragonal : 42m : I42m	2.CB.300
Kuramite	Cu₃SnS₄ tetragonal : 42m : I42m	2.CB.310
Černýite	Cu₂CdSnS₄ tetragonal : 42m : I42m	2.CB.320
Velikite	Cu₂(Hg,Zn)SnS₄ tetragonal : 4 : I4	2.CB.340
Hocartite	Ag₂FeSnS₄ tetragonal : 42m : I42m	2.CB.350
Pirquitasite	Ag₂ZnSnS₄ tetragonal : 42m, 4 : I42m, I4	2.CB.360
Kësterite	Cu₂(Zn,Fe)SnS₄ tetragonal : 4 : I4	2.CB.370
Ferrokësterite	Cu₂FeSnS₄ tetragonal : 4 : I4	2.CB.375
Stannoidite	Cu₈(Fe,Zn)₃Sn₂S₁₂ orthorhombisch : 222 : I222	2.CB.390

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Chalcopyrite	CuFeS₂ tetragonal : 42m : I42d	02.09.01.01
Eskebornite	CuFeSe₂ tetragonal : 42m : P42c	02.09.01.02
Gallite	CuGaS₂ tetragonal : 42m : I42d	02.09.01.03
Roquesite	CuInS₂ tetragonal : 42m : I42d	02.09.01.04
Lenaite	AgFeS₂ tetragonal : 42m : I42d	02.09.01.05
Laforêtite	AgInS₂ tetragonal : 42m : I42d	02.09.01.06
Stannite	Cu₂FeSnS₄ tetragonal : 42m : I42m	02.09.02.01
Černýite	Cu₂CdSnS₄ tetragonal : 42m : I42m	02.09.02.02
Briartite	Cu₂(Zn,Fe)GeS₄ tetragonal : 42m : I42m	02.09.02.03
Kuramite	Cu₃SnS₄ tetragonal : 42m : I42m	02.09.02.04
Sakuraiite	(Cu,Zn,Fe)₃(In,Sn)S₄ kubisch	02.09.02.05
Hocartite	Ag₂FeSnS₄ tetragonal : 42m : I42m	02.09.02.06
Pirquitasite	Ag₂ZnSnS₄ tetragonal : 42m, 4 : I42m, I4	02.09.02.07
Velikite	Cu₂(Hg,Zn)SnS₄ tetragonal : 4 : I4	02.09.02.08
Kësterite	Cu₂(Zn,Fe)SnS₄ tetragonal : 4 : I4	02.09.02.09
Ferrokësterite	Cu₂FeSnS₄ tetragonal : 4 : I4	02.09.02.10
Barquillite	Cu₂(Cd,Fe)GeS₄ tetragonal : 42m : I42m	02.09.02.11
Chatkalite	Cu₆Fe²⁺Sn₂S₈ tetragonal : 42m : P4m2	02.09.03.02
Stannoidite	Cu₈(Fe,Zn)₃Sn₂S₁₂ orthorhombisch : 222 : I222	02.09.03.03
Renierite	(Cu,Zn)₁₁(Ge,As)₂Fe₄S₁₆ tetragonal : 42m : P42c	02.09.04.01
Germanite	Cu₁₃Fe₂Ge₂S₁₆ kubisch : 43m : P43n	02.09.04.02
Maikainite	Cu₁₀Fe₃MoGe₃S₁₆ kubisch	02.09.04.03
Ovamboite	Cu₁₀Fe₃WGe₃S₁₆ kubisch	02.09.04.04
Morozeviczite	(Pb,Fe)₃Ge_1-xS₄ kubisch	02.09.05.01
Polkovicite	(Fe,Pb)₃(Ge,Fe)_1-xS₄ kubisch	02.09.05.02
Hemusite	Cu¹⁺₄Cu²⁺₂SnMoS₈ kubisch	02.09.06.01
Kiddcreekite	Cu₆SnWS₈ kubisch	02.09.06.02
Putoranite	Cu_1.1Fe_1.2S₂ kubisch : m3m	02.09.07.01
Talnakhite	Cu₉(Fe,Ni)₈S₁₆ kubisch : 43m : I43m	02.09.08.01
Haycockite	Cu₄Fe₅S₈ orthorhombisch	02.09.08.02
Mooihoekite	Cu₉Fe₉S₁₆ tetragonal : 42m : P42m	02.09.08.03
Raguinite	TlFeS₂ monoklin : 2/m : C2/m	02.09.09.01

Related minerals "Hey's Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Stannoidite	Cu₈(Fe,Zn)₃Sn₂S₁₂ orthorhombisch : 222 : I222	06.01.12
Černýite	Cu₂CdSnS₄ tetragonal : 42m : I42m	06.01.13
Vinciennite	Cu₁₀Fe₄Sn(As,Sb)S₁₆ tetragonal	06.01.14
Hocartite	Ag₂FeSnS₄ tetragonal : 42m : I42m	06.01.16

Alternative Name

German	Cernyit
English	Cernyite

CNMNC (IMA)-Number

IMA 1976-057

CNMNC symbol

Symbol

Čný

Automatic Links to external internet sources (Responsibility is with the operator)

German pages	DeWikiPedia - search for: Černýit Google-Bilder-Suche - search for: Černýit Mineralogisch-Petrographisches-Institut Hamburg - search for: Černýit
English pages	Mindat - search for: Černýite Webmineral - search for:Černýite Handbook-of-Mineralogy - search for: Černýite RRUFF - Raman, XRD and other mineral data - search for: Černýite RRUFF - References and PDF downloads - search for: Černýite American-Mineralogist-Crystal-Structure-Database - search for: Černýite Athena - search for: Černýite

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German pages

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