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Berndtite-2T

Collectors Summary

Color graugelb
Streak color goldgelb
Hardness (Mohs) 1.00 - 2.00
Cleavages gut
Crystal System trigonal, P3m1

Chemism

Chem­ical formula

SnS2

Addi­tional chem. informa­tion

2 bekannte Polytypen: Berndtit-2T, Berndtit-4H

Chem­ical com­po­si­tion

Zinn, Schwefel

Unit weight: 182.8417 u; Number of atoms in the formula: 3

Info

Empirical formula:

SnS2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

35.07

2

66.67

32.0655000

64.1310000

Tin

Sn

64.93

1

33.33

118.7107000

118.7107000

Strunz 9th edi­tion incl. updates

2.EA.10

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
E: Metallsulfide mit M:S >= 1:2
A: M:S = 1:2, mit Cu, Ag, Au; Ni, Sn, PGE, Mo, W
10:Calaverit-Gruppe

Lapis Clas­sifica­tion

II/D.28-010

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1
28: Melonit-Gruppe

Clas­sifica­tion by Hölzel

2.EA.330

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
A: Me/S=1/2 with Cu,Ag,Au, etc.
3: With Ni,Sn,Pd,Pt, etc. - Melonite-Group

IMA sta­tus

anerkannt Mineral, Polytyp

Min­eral sta­tus

anerkanntes Mineral

Var­i­ety / poly­type of

Berndtite

Optical Properties

Color

graugelb

Streak color

goldgelb

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell param­e­ters a (Å)

3.645

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

5.901

Cell param­e­ters a/b or c/a

1.619

Cell param­e­ters c/b

-

Z

1

Volumne (ų)

67.897

X-Ray Pow­der Diffrac­tion

5.89(100),
3.162(30),
2.784(50),
2.155(20),
1.824(30),
1.743(20),
1.669(10),
1.526(10);

XRD chart Berndtite-2T

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

1.00 - 2.00

VHN (Hard­ness Vick­ers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.51 (berechnet)

4.471 ( ρ calc. Mineralienatlas )

Cleav­ages

gut

References

Naturwissenschaften 55 (1968), 177.

American Mineralogist 50 (1965), 2107 (Zusammenfassung).

American Mineralogist 51, 1551.

American Mineralogist 58 (1973), 347.

American Mineralogist 60, 739.

Mineralogical Magazine 54 (1990), 137.

Acta Crystallographica B46 (1990), 449.

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

'Berndtite'

SnS2

2.EA.10

Calaverite

AuTe2

monoklin : 2/m : C2/m

2.EA.10

Berndtite-2T

SnS2

trigonal : 3m : P3m1

2.EA.10

Berndtite-4H

SnS2

hexagonal : 6mm : P63mc

2.EA.10

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

Berndtite-2T

SnS2

trigonal : 3m : P3m1

II/D.28-010

Kitkaite

NiTeSe

trigonal : 3m : P3m1

II/D.28-020

Melonite

NiTe2

trigonal : 3m : P3m1

II/D.28-030

Merenskyite

PdTe2

trigonal : 3m : P3m1

II/D.28-040

Shuangfengite

IrTe2

trigonal : 3m : P3m1

II/D.28-045

Moncheite

(Pt,Pd)(Te,Bi)2

trigonal : 3m : P3m1

II/D.28-050

Sudovikovite

PtSe2

trigonal : 3m : P3m1

II/D.28-055

Verbeekite

PdSe2

monoklin : 2/m, 2, m : C2/m, C2, Cm

II/D.28-060

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

Kitkaite

NiTeSe

trigonal : 3m : P3m1

2.EA.300

Melonite

NiTe2

trigonal : 3m : P3m1

2.EA.310

Berndtite-2T

SnS2

trigonal : 3m : P3m1

2.EA.330

Berndtite-4H

SnS2

hexagonal : 6mm : P63mc

2.EA.340

Kotulskite

Pd(Te,Bi)2-x {x ≈ 0.4}

hexagonal : 6/mmm : P63/mmc

2.EA.360

Merenskyite

PdTe2

trigonal : 3m : P3m1

2.EA.370

Moncheite

(Pt,Pd)(Te,Bi)2

trigonal : 3m : P3m1

2.EA.380

Sudovikovite

PtSe2

trigonal : 3m : P3m1

2.EA.385

Shuangfengite

IrTe2

trigonal : 3m : P3m1

2.EA.390

Other languages

German

Berndtit-2T

Spanish

Berndtita-2T

French

Berndtite-2T

English

Berndtite-2T

Russian

Берндтит-2T

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

German pages

DeWikiPedia - search for: Berndtit-2T
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Mineralogisch-Petrographisches-Institut Hamburg - search for: Berndtit-2T

English pages

Mindat - search for: Berndtite-2T
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RRUFF - References and PDF downloads - search for: Berndtite-2T
American-Mineralogist-Crystal-Structure-Database - search for: Berndtite-2T
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Russian pages

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Mineral Dealer

German pages

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Locations with GPS information