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Frohbergite (Frohbergit)

Pictures (1 Images total)

Frohbergit
Views (File:
1592587503
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Frohbergit
schwarze Aggreagte von Frohbergit auf Quarz, Gold Hill, Bowie area, Cochise County, Arizona, USA; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Arizona/Cochise Co.
Mineral: Frohbergite
Image: 1592587503
License: Usage for Mineralienatlas project only
Frohbergit

schwarze Aggreagte von Frohbergit auf Quarz, Gold Hill, Bowie area, Cochise County, Arizona, USA; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-19
Locality: Cochise Co. / Arizona / USA

Collectors Summary

Color weiß mit bläulich oder blassrosa Farbton
Hardness (Mohs) 4.5
Solubility +++ HNO3
Crystal System orthorhombisch, Pnnm

Chemism

Chemical formula

FeTe2

Chemical composition

Eisen, Tellur

Unit weight: 311.0512 u; Number of atoms in the formula: 3

Info

Empirical formula:

FeTe2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Iron

Fe

17.95

1

33.33

55.8452000

55.8452000
Tellurium

Te

82.05

2

66.67

127.6030000

255.2060000

Analysis wt%

Fe : 18.54, Te : 81.49 (Ref: Mineralogical Magazine 89)

Strunz 9th edition incl. updates

2.EB.10

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
E: Metallsulfide mit M:S >= 1:2
B: M:S = 1:2, mit Fe, Co, Ni, PGE, usw.
10:Markasit-Gruppe

Lapis Classification

II/D.20-050

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

Classification by Hölzel

2.EB.620

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
B: With Fe,Co,Ni,PGE Pyrite, Marcasite Family
6: Marcasite-Group

Dana 8th edition

02.12.02.03

02: Sulfide Minerals
12: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:2
02: Marcasite Group (Orthorhombic: Pnnm)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Marcasite group

Optical Properties

Color

weiß mit bläulich oder blassrosa Farbton

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnnm

Cell parameters a (Å)

5.28

Cell parameters b (Å)

6.26

Cell parameters c (Å)

3.85

Cell parameters a/b or c/a

0.843

Cell parameters c/b

0.615

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

127.253

X-Ray Powder Diffraction

3.29(30),
2.80(100),
2.70(70),
2.06(50),
1.935(30),
1.841(40),
1.573(30),
1.105(30)
XRD chart Frohbergite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

274

Density (g/cm³)

8.055

8.117 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3

(Co-)Type locality

(Co-)Type locality

Kanada/Québec/Abitibi Co./Montbray Township/Robb-Montbray Mine

Preface

Author (Name, Year)

Thompson, 1947

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 165

IMA group assignments

Other languages

German

Frohbergit

Spanish

Frohbergita

English

Frohbergite

French

Frohbergite

Russian

Фробергит

Simplified Chinese

碲铁矿

CNMNC symbol

Symbol

Frb

Locations with GPS information