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Pyrochroite (Pyrochroit)

Pictures (4 Images total)

Pyrochroit
Views (File:
1244974518
): 1834
Pyrochroit
Bildbreite: 5 mm; Fundort: Långban, Filipstad, Värmland, Schweden
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Pyrochroite
Image: 1244974518
Rating: 5 (votes: 3)
License: Usage for Mineralienatlas project only
Pyrochroit

Bildbreite: 5 mm; Fundort: Långban, Filipstad, Värmland, Schweden
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-14
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden
Pyrochroit
Views (File:
1274607620
): 1334
Pyrochroit
Bildbreite: 4,6 mm, Fundort: Sterling Mine, Franklin, New Jersey, USA
Copyright: Public Domain; Contribution: thdun5
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Ogdensburg/Sterling Hill/Sterling Mine
Mineral: Pyrochroite
Image: 1274607620
License: Usage for Mineralienatlas project only
Pyrochroit

Bildbreite: 4,6 mm, Fundort: Sterling Mine, Franklin, New Jersey, USA
Copyright: Public Domain
Contribution: thdun5 2010-05-23
Locality: Sterling Mine / Sterling Hill / Ogdensburg / Franklin Mining District / Sussex Co. / New Jersey / USA
Pyrochroit
Views (File:
1642243588
): 99
Pyrochroit
Etwa 35 mm x 25 mm große, leicht violett angelaufene Pyrochroit -Stufe von der Wessels Mine im Kalahari Manganese Field in Südafrika.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: KMF-PyrCh-5-1-1
Location: Südafrika/Nordkap (Northern Cape), Provinz/Kalahari Manganese Field/Hotazel/Wessel's Mine (Wessels Mine)
Mineral: Pyrochroite
Image: 1642243588
License: Usage for Mineralienatlas project only
Pyrochroit (SNr: KMF-PyrCh-5-1-1)

Etwa 35 mm x 25 mm große, leicht violett angelaufene Pyrochroit -Stufe von der Wessels Mine im Kalahari Manganese Field in Südafrika.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2022-01-15
Locality: Wessel's Mine (Wessels Mine) / Hotazel / Kalahari Manganese Field / Nordkap (Northern Cape), Provinz / Südafrika
Pyrochroit
Views (File:
1244974463
): 1561
Pyrochroit
Bildbreite: 4 mm; Fundort: Långban, Filipstad, Värmland, Schweden
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte
Mineral: Pyrochroite
Image: 1244974463
Rating: 2 (votes: 1)
License: Usage for Mineralienatlas project only
Pyrochroit

Bildbreite: 4 mm; Fundort: Långban, Filipstad, Värmland, Schweden
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-14
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

You find additional Pyrochroit specimen at the Geolitho Museum

Collectors Summary

Color farblos, weiß, blass grün, blau, dunkelbraun
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ Säuren
Crystal System trigonal, P3m1

Chemism

Chemical formula

Mn(OH)2

Chemical composition

Mangan, Sauerstoff, Wasserstoff

Unit weight: 88.9528039 u; Number of atoms in the formula: 5

Info

Empirical formula:

Mn(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.27

2

40.00

1.0079470

2.0158940
Oxygen

O

35.97

2

40.00

15.9994300

31.9988600
Manganese

Mn

61.76

1

20.00

54.9380499

54.9380499

Analysis wt%

MnO : 66.98, MgO : 6.56, FeO : 1.39, ZnO : 3.08, H2O : 20.57, MnO2 : 0.89 (Ref: Dana, 7th ed. 1)

Strunz 9th edition incl. updates

4.FE.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
E: Hydroxide mit OH, ohne H2O; Lagen kantenverknüpfter Oktaeder
05:Brucit-Gruppe

Lapis Classification

IV/F.03-030

IV: OXIDE
F: Hydroxide und oxidische Hydrate (wasserhaltige Oxide mit Schichtstruktur)
3: Brucit-Reihe

Classification by Hölzel

4.FA.120

4: OXIDES
F: Hydroxides and Hydrates (without V and U)
A: Dihydroxides Me(OH)2
1: Brucite-Group

Dana 8th edition

06.02.01.03

06: Hydroxides and Oxides Containing Hydroxyl
02: Hydroxides and Oxides Containing Hydroxyl where X++ (OH)2
01: Brucite group (Rhombohedral: P-3m1)

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß, blass grün, blau, dunkelbraun

Streak color

weiß

Diaphaneity (Transparency)

teilweise durchscheinend bis opak

max. Birefringence

0.042
Birefringence chart\! Pyrochroite title=Birefringence chart Pyrochroite

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

1.723

RI value γ / ε

1.681

Ri mean

1.709

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Image ⇒ Luminescence ⇒ excitation ⇒ UV shortwave ~254nm (1 Images total)

Pyrochroit
Views (File:
1401212090
): 1417
Pyrochroit
Deckungsgleiche Aufnahmen, derb gelblich; das UV-Bild (254nm) zeigt eine rote Fluoreszenz könnte Calcit sein; BB = 3,8 mm. Fundort: Franklin, Franklin Mining District, Sussex Co., New Jersey, USA.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A002574, Donator: Klaus Fleck
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Pyrochroite
Encyclopedia: Fluoreszenz
Image: 1401212090
License: Usage for Mineralienatlas project only
Pyrochroit (SNr: A002574)

Deckungsgleiche Aufnahmen, derb gelblich; das UV-Bild (254nm) zeigt eine rote Fluoreszenz könnte Calcit sein; BB = 3,8 mm. Fundort: Franklin, Franklin Mining District, Sussex Co., New Jersey, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2014-05-27
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell parameters a (Å)

3.34

Cell parameters b (Å)

-

Cell parameters c (Å)

4.68

Cell parameters a/b or c/a

1.401

Cell parameters c/b

-

Z

1

Volumne (ų)

45.214

X-Ray Powder Diffraction

4.72(90),
2.87(40),
2.45(100),
1.826(60),
1.658(40),
1.565(30),
1.382(20),
1.374(20)
XRD chart Pyrochroite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.26

3.267 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Persberg/Pajsberg/Stora Pajsberg Mine

Preface

Author (Name, Year)

Igelström, 1864

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 458

Other languages

Spanish

Pirocroíta

German

Pyrochroit

English

Pyrochroite

French

Pyrochroite

Russian

Пирохроит

Simplified Chinese

羟锰矿

Alternative Name

Eisenpyrochroite

Spanish

Pyrochroita

Japanese

パイロクロアイト

CNMNC symbol

Symbol

Pyc

Locations with GPS information