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Eveite

Pictures (1 Images total)

Eveit mit Akrochordit
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Eveit mit Akrochordit
hellgrüne Kristalle von Eveit neben bräunlichem Akrochordit, Langban, Schweden; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Akrochordite, Eveite
Image: 1582227552
License: Usage for Mineralienatlas project only
Eveit mit Akrochordit

hellgrüne Kristalle von Eveit neben bräunlichem Akrochordit, Langban, Schweden; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-20
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Color abfelgrün
Streak color weiß
Hardness (Mohs) 4
Solubility +++ HCl
Crystal System orthorhombisch, Pnnm

Chemism

Chemical formula

Mn2(AsO4)(OH)

Chemical composition

Arsen, Mangan, Sauerstoff, Wasserstoff

Unit weight: 265.8027988 u; Number of atoms in the formula: 9

Info

Empirical formula:

Mn2(AsO4)(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.38

1

11.11

1.0079470

1.0079470
Oxygen

O

30.10

5

55.56

15.9994300

79.9971500
Manganese

Mn

41.34

2

22.22

54.9380499

109.8760998
Arsenic

As

28.19

1

11.11

74.9216020

74.9216020

Analysis wt%

MnO : 53.38, As2O5 : 43.24, H2O : 3.39 (Ref: berechnet)

Strunz 9th edition incl. updates

8.BB.30

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
B: Mit ausschließlich mittelgroßen [Kationen], (OH, etc.): RO4 ≤ 1:1
30:Libethenit-Gruppe

Lapis Classification

VII/B.06-040

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
6: Mittelgroße Kationen: Mg-Mn-Fe-Cu-Zn; Libethenit-Gruppe

Classification by Hölzel

8.BB.340

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
B: Phosphates, C medium, V: 2, OH/XO4=1/1
3: Orthorhombic Libethenite-Group

Dana 8th edition

41.06.06.04

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
06: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A)2 (XO4) Zq
06: Olivenite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Andalusite group

Optical Properties

Color

abfelgrün

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.032
Birefringence chart\! Eveite title=Birefringence chart Eveite

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

1.700

RI value β

1.715

RI value γ / ε

1.732

Ri mean

1.716

2V angle

Biaxial (+) 65°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnnm

Cell parameters a (Å)

8.548

Cell parameters b (Å)

8.721

Cell parameters c (Å)

6.296

Cell parameters a/b or c/a

0.980

Cell parameters c/b

0.722

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

469.349

X-Ray Powder Diffraction

6.10(70),
5.09(80),
4.39(100),
3.14(40),
3.058(90),
2.797(50),
2.552(40),
2.528(60)
XRD chart Eveite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.76

3.761 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte

Preface

Author (Name, Year)

Moore, 1968

References

Arkiv för Mineralogi och Geologi 4 (1968), 473

IMA group assignments

Other languages

German

Eveit

English

Eveite

French

Eveite

Spanish

Eveíta

Russian

Эвеит

CNMNC (IMA)-Number

IMA 1966-047

CNMNC symbol

Symbol

Ev

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 7phNm8b88EKaIc1CBLEBlw
GUID (Global unique identifier) 9B4D98EE-FCC6-42F0-9A21-CD4204B10197
Database ID 1079