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Armangite

Pictures (2 Images total)

Armangit
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Armangit
Langban, Filipstad, Schweden. BB: 2,0mm; Ex. R. Feigl Sammlung
Copyright: Mabu; Contribution: Mabu
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Armangite
Image: 1549118602
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Armangit

Langban, Filipstad, Schweden. BB: 2,0mm; Ex. R. Feigl Sammlung

Copyright: Mabu
Contribution: Mabu 2019-02-02
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden
Armangit
Views (File:
1549118478
): 551
Armangit
Langban, Filipstad, Schweden. BB 1,0mm; Ex. R. Feigl Sammlung
Copyright: Mabu; Contribution: Mabu
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Armangite
Image: 1549118478
License: Usage for Mineralienatlas project only
Armangit

Langban, Filipstad, Schweden. BB 1,0mm; Ex. R. Feigl Sammlung

Copyright: Mabu
Contribution: Mabu 2019-02-02
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Hardness (Mohs) 4
Solubility +++ HCl
Crystal System trigonal, P3

Chemism

Chemical formula

Mn262+[CO3|(AsO2(OH))4|(AsO3)14]

Chemical composition

Arsen, Mangan, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 3704.9882114 u; Number of atoms in the formula: 106

Info

Empirical formula:

Mn26[CO3(AsO2(OH))4(AsO3)14]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.11

4

3.77

1.0079470

4.0317880

Carbon

C

0.32

1

0.94

12.0107800

12.0107800

Oxygen

O

24.61

57

53.77

15.9994300

911.9675100

Manganese

Mn

38.55

26

24.53

54.9380499

1,428.3892974

Arsenic

As

36.40

18

16.98

74.9216020

1,348.5888360

Analysis wt%

MnO : 45.06, FeO : 2.19, CaO : 2.83, MgO : 0.49, As2O3 : 42.92, Sb2O3 : 0.40, CO2 : 5.08, H2O : 0.71 (Ref: American Mineralogist 79)

Strunz 9th edition incl. updates

4.JB.20

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
J: Antimonite, Bismuthite, Sulfite, Selenite, Tellurite
B: [Arsenite], [Antimonite], [Bismuthite]; mit zusätzlichen [Anionen], ohne H20
20:Armangit-Gruppe

Lapis Classification

IV/J.04-040

IV: OXIDE
J: Arsenite (mit As3+)
4: Arsenite mit [AsO3] 3--Inseln

Classification by Hölzel

5.JB.170

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
J: Arsenites
B: Arsenites (+Anions -Water)

Dana 8th edition

46.02.07.01

46: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
02: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites with miscellaneous formulae

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.02

Birefringence chart\! Armangite title=Birefringence chart Armangite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

2.01

RI value γ / ε

1.99

Ri mean

2.003

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

147

Space Group

P3

Cell parameters a (Å)

13.491

Cell parameters b (Å)

-

Cell parameters c (Å)

8.855

Cell parameters a/b or c/a

0.656

Cell parameters c/b

-

Z

1

Volume (ų)

1395.75

X-Ray Powder Diffraction

5.80(40),
3.92(50),
2.94(70),
2.762(100),
2.428(70),
1.759(60),
1.676(50),
1.459(50)

XRD chart Armangite

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)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.43 (gemessen)

4.408 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

Preface

Author (Name, Year)

Aminoff & Mauzelius, 1920

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 23

Other languages

German

Armangit

Spanish

Armangita

French

Armangite

English

Armangite

Russian

Армангит

Japanese

アーマング石

CNMNC symbol

Symbol

Amg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) B_FfC5JLZUqVBpChzXL1NQ
GUID (Global unique identifier) 0B5FF107-4B92-4A65-9506-90A1CD72F535
Database ID 185