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Pyrochroite

Pictures (4 Images total)

Pyrochroit
Views (Image: 1244974518): 1283
Pyrochroit

Bildbreite: 5 mm; Fundort: Långban, Filipstad, Värmland, Schweden

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-14
Pyrochroit
Views (Image: 1274607620): 898
Pyrochroit

Bildbreite: 4,6 mm, Fundort: Sterling Mine, Franklin, New Jersey, USA

Copyright: Public Domain
Contribution: thdun5 2010-05-23
Pyrochroit
Views (Image: 1401212090): 708
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
Pyrochroit
Views (Image: 1244974463): 1116
Pyrochroit

Bildbreite: 4 mm; Fundort: Långban, Filipstad, Värmland, Schweden

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-14

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

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

Author (Name, Year)

Igelström, 1864

References

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

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Amakinite

(Fe2+,Mg)(OH)2

trigonal : 3m : P3m1

4.FE.05

Brucite

Mg(OH)2

trigonal : 3m : P3m1

4.FE.05

Fougèrite

Fe2+6Fe3+2(OH)16CO3·3H2O

trigonal : 3m : R3m

4.FE.05

Portlandite

Ca(OH)2

trigonal : 3m : P3m1

4.FE.05

Pyrochroite

Mn(OH)2

trigonal : 3m : P3m1

4.FE.05

Theophrastite

Ni(OH)2

trigonal : 3m : P3m1

4.FE.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Brucite

Mg(OH)2

trigonal : 3m : P3m1

IV/F.03-010

Amakinite

(Fe2+,Mg)(OH)2

trigonal : 3m : P3m1

IV/F.03-020

Pyrochroite

Mn(OH)2

trigonal : 3m : P3m1

IV/F.03-030

Theophrastite

Ni(OH)2

trigonal : 3m : P3m1

IV/F.03-040

Paraotwayite

Ni(OH)2-x(SO4,CO3)0.5x

IV/F.03-050

Jamborite

Ni2+1-xCo3+x(OH)2-x(SO4)x·nH2O

trigonal : 3m : R3m

IV/F.03-055

Sweetite

Zn(OH)2

IV/F.03-060

Ashoverite

Zn(OH)2

tetragonal : 4/mmm : I41/amd

IV/F.03-070

Wülfingite

Zn(OH)2

orthorhombisch : 222 : P212121

IV/F.03-080

Spertiniite

Cu(OH)2

orthorhombisch : mm2 : Cmc21

IV/F.03-090

Portlandite

Ca(OH)2

trigonal : 3m : P3m1

IV/F.03-100

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Brucite

Mg(OH)2

trigonal : 3m : P3m1

4.FA.100

Pyrochroite

Mn(OH)2

trigonal : 3m : P3m1

4.FA.120

Theophrastite

Ni(OH)2

trigonal : 3m : P3m1

4.FA.150

Portlandite

Ca(OH)2

trigonal : 3m : P3m1

4.FA.170

Amakinite

(Fe2+,Mg)(OH)2

trigonal : 3m : P3m1

4.FA.180

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Brucite

Mg(OH)2

trigonal : 3m : P3m1

06.02.01.01

Amakinite

(Fe2+,Mg)(OH)2

trigonal : 3m : P3m1

06.02.01.02

Pyrochroite

Mn(OH)2

trigonal : 3m : P3m1

06.02.01.03

Portlandite

Ca(OH)2

trigonal : 3m : P3m1

06.02.01.04

Theophrastite

Ni(OH)2

trigonal : 3m : P3m1

06.02.01.05

Behoite

Be(OH)2

orthorhombisch : 222 : P212121

06.02.02.01

Clinobehoite

Be(OH)2

monoklin : 2 : P21

06.02.03.01

Spertiniite

Cu(OH)2

orthorhombisch : mm2 : Cmc21

06.02.04.01

Calumetite

Cu(OH,Cl)2·2H2O

06.02.05.01

Anthonyite

Cu(OH,Cl)2·3H2O

monoklin : 2/m

06.02.06.01

Duttonite

V4+O(OH)2

monoklin : 2/m : I2/c

06.02.07.01

Tivanite

V3+TiO3(OH)

monoklin : 2/m : P21/c

06.02.08.01

Sweetite

Zn(OH)2

06.02.09.01

Other languages

Spanish

Pirocroíta

German

Pyrochroit

English

Pyrochroite

French

Pyrochroite

Russian

Пирохроит

Simplified Chinese

羟锰矿

Alternative Name

Eisenpyrochroite

Spanish

Pyrochroita

Japanisch

パイロクロアイト

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Pyrochroit
Google-Bilder-Suche - search for: Pyrochroit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Pyrochroit

English pages

Mindat - search for: Pyrochroite
Webmineral - search for: Pyrochroite
Handbook-of-Mineralogy - search for: Pyrochroite
RRUFF Database-of-Raman-spectroscopy - search for: Pyrochroite
American-Mineralogist-Crystal-Structure-Database - search for: Pyrochroite
Athena - search for: Pyrochroite

Russian pages

Webmineral.ru - search for: Пирохроит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Pyrochroit
Bosse - search for: Pyrochroit



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