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Anduoite (Anduoit)

Collectors Summary

Color bleigrau-met.
Streak color grauschwarz
Hardness (Mohs) 6.50 - 7.00
Solubility - HNO3 1:1, HCl
Crystal System orthorhombisch, Pnnm

Chemism

Chemical formula

(Ru,Os)As2

Chemical composition

Arsen, Osmium, Ruthenium

Unit weight: 273.205454 u; Number of atoms in the formula: 3

Info

Empirical formula:

(Ru0.75Os0.25)As2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Arsenic

As

54.85

2

66.67

74.9216020

149.8432040
Ruthenium

Ru

27.75

0.75

25.00

101.0720000

75.8040000
Osmium

Os

17.41

0.25

8.33

190.2330000

47.5582500

Analysis wt%

Ru : 35.50, Os : 5.50, Ir : 2.00, As : 56.90, PLT : 43.00 (Ref: American Mineralogist 80)

Strunz 9th edition incl. updates

2.EB.15

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.
15:Löllingit-Gruppe

Lapis Classification

II/D.20-070

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.890

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

IMA status

Ohne Prüfung durch die CNMNC veröffentlicht, inzwischen anerkannt nach IMA/CNMNC List of Mineral Names (2009)

Mineral status

anerkanntes Mineral

Optical Properties

Color

bleigrau-met.

Streak color

grauschwarz

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnnm

Cell parameters a (Å)

5.41

Cell parameters b (Å)

6.206

Cell parameters c (Å)

3.01

Cell parameters a/b or c/a

0.872

Cell parameters c/b

0.485

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

101.059

X-Ray Powder Diffraction

2.000(50),
1.920(100),
1.501(90),
1.210(70),
1.187(70),
1.133(80),
1.095(90),
1.083(40)
XRD chart Anduoite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.50 - 7.00

VHN (Hardness Vickers)

1158 (10g)

Density (g/cm³)

8.692 (berechnet)

8.978 ( ρ calc. Mineralienatlas )

Instability

- HNO3 1:1, HCl

(Co-)Type locality

(Co-)Type locality

China/Tibet (Xizang AR)/Nagchu (Naqu), Präfektur/Amdo (Anduo), Kreis/Anduo Cr-Lagerstätte

Preface

Author (Name, Year)

Yu & Chou, 1979

References

Kexue Tongbao (in Chinese) 15 (1979), 704

Other languages

German

Anduoit

French

Anduoite

English

Anduoite

Spanish

Anduoíta

Russian

Андуоит

Simplified Chinese

安多矿

Alternative Name

German

Andouoit

Spanish

Andouoita

French

Andouoite

CNMNC symbol

Symbol

Adu

Locations with GPS information