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Berndtite-4H

Collectors Summary

Color goldgelb
Streak color goldgelb
Hardness (Mohs) 1 - 2
Crystal System hexagonal, P63mc

Chemism

Chemical formula

SnS2

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

Analysis wt%

Sn : 64.95, S : 35.05 (Ref: berechnet)

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

Classification by Hölzel

2.EA.340

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

anerkanntes Mineral, Polytyp

Mineral status

anerkanntes Mineral

Variety / polytype of

Berndtite

Optical Properties

Color

goldgelb

Streak color

goldgelb

Change in color

intensive bräunliche bis orangegelbe interne Reflektionen

Crystallography

Crystal System

hexagonal

Class (H-M)

6mm

Space Group number

186

Space Group

P63mc

Cell parameters a (Å)

3.645

Cell parameters b (Å)

-

Cell parameters c (Å)

11.802

Cell parameters a/b or c/a

3.238

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

135.794

X-Ray Powder Diffraction

5.90(10),
3.16(30),
3.05(20),
2.78(40),
1.82(100),
1.74(20),
1.58(30),
1.52(10);

XRD chart Berndtite-4H

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

Physical Properties

Hardness (Mohs)

1 - 2

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.57 (berechnet)

4.471 ( ρ calc. Mineralienatlas )

Other languages

German

Berndtit-4H

English

Berndtite-4H

Locations with GPS information