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Černýite

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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-...

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, 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

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

Volumne (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 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

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

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

German pages

DeWikiPedia - search for: Černýit
Google-Bilder-Suche - search for: Černýit
Mineralienatlas.de (Forum) - 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
Strahlen.org - search for: Černýite

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Černýit
Crystal-Treasure.com - search for: Černýit
Bosse - search for: Černýit
Edelsteine Neuburg - Gundolf Fischer - search for: Černýit

Locations with GPS information