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Černýite

Pictures (1 Images total)

Černýite, Stannite
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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-du-Bonnet area, Manitoba, Canada;
Copyright: Brent Thorne; Contribution: Stefan
Location: Kanada/Manitoba/Lac-du-Bonnet-Gebiet/Bernic-See/Tanco-Pegmatit
Mineral: Černýite
Image: 1480085818
License: Usage for Mineralienatlas project only
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-...
Copyright: 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) 4
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

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, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
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

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
Reflection chart Černýite

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

Volume (ų)

329.103

X-Ray Powder Diffraction

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

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

(Co-)Type locality

USA/South Dakota/Pennington County/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

Other languages

Spanish

Cernýita

French

Cernýite

German

Černýit

English

Černýite

Alternative Name

German

Cernyit

English

Cernyite

CNMNC (IMA)-Number

IMA 1976-057

CNMNC symbol

Symbol

Čný

Locations with GPS information

IDs

GUSID (Global unique identifier short form) giVrFVrRd0eu96nNQWQ1hg
GUID (Global unique identifier) 156B2582-D15A-4777-AEF7-A9CD41643586
Database ID 649