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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

Volume (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)

Crystals 3D

Open larger view

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.

Other languages

German

Berndtit-2T

Spanish

Berndtita-2T

French

Berndtite-2T

English

Berndtite-2T

Russian

Берндтит-2T

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 2ZJ3hfy5CUaMieZsy8Dm-A
GUID (Global unique identifier) 857792D9-B9FC-4609-8C89-E66CCBC0E6F8
Database ID 369