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Pyroaurite-3R (Igelströmite)

Pictures (19 Images total)

Pyroaurit-3R
Views (Image: 1560622759): 202
Pyroaurit-3R

Pyroaurit-3R neben weißen Aragonit; Fundort westlich von Vrisia, Rhodos, Griechenland;Bildbreite ca. 1.2 mm; Eine Probe aus dem Fund wurde analysiert mit Raman und EDX;

Copyright: Stefan
Contribution: Stefan 2019-06-15
Locality: Serpentinitsteinbruch / Vrisia / Kallithea, Gemeindebezirk / Rhodos, Insel / Südliche Ägäis (Νότιο Αιγαίο) / Griechenland
Pyroaurit-3R
Views (Image: 1566852491): 143
Pyroaurit-3R

Orangelängs gestreckte Pyroaurit-3R-Kristalle; Griechenland/Südliche Ägäis (Νότιο Αιγαίο)/Rhodos, Insel/Kallithea, Gemeindebezirk/Vrisia/Serpentinit-Steinbruch; Bildbreite 1.2 mm; Eigenfund August ...

Collection: Stefan
Copyright: Stefan
Contribution: Stefan 2019-08-26
Locality: Serpentinitsteinbruch / Vrisia / Kallithea, Gemeindebezirk / Rhodos, Insel / Südliche Ägäis (Νότιο Αιγαίο) / Griechenland
Pyroaurit
Views (Image: 1224227918): 1817
Pyroaurit

Größe: 4,5 mm; Fundort: Borcola Pass (Cava del Passo della Borcola), Posina, Vicenza, Venetien (Veneto), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-10-17
Locality: Borcola Pass (Cava del Passo della Borcola) / Posina / Vicenza, Provinz / Venetien (Veneto), Region / Italien
Pyroaurit
Views (Image: 1278416308): 1880, Rating: 7.33
Pyroaurit

Bildbreite: 2 mm; Fundort: Ightem Mine (Irhtem Mine), Ightem, Bou Azzer District, Tazenakht, Marokko

Copyright: Stephan Wolfsried
Contribution: Hg 2010-07-06
Locality: Ightem (Irhtem) / Bou Azer (Bou Azzer), Distrikt / Taznakht / Ouarzazate, Provinz / Drâa-Tafilalet, Region / Marokko
Pyroaurit
Views (Image: 1222955011): 1696
Pyroaurit (SNr: A012709)

Fo.: Langban, Filipstad, Värmland, Schweden, trigonal tafelige, beige, XX, BB.: 1,0mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2008-10-02
Locality: Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte / Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden
Pyroaurit
Views (Image: 1278936000): 1939
Pyroaurit

Graue, perlglänzende Pyroaurit-Plättchen ("Eisenbrucit") auf 8 cm breiter Stufe von Siebenlehn, Freiberger Revier, Erzgebirge, Sachsen, Deutschland.

Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2010-07-12
Locality: Siebenlehn / Nossen / Meißen, Landkreis / Sachsen / Deutschland

Collectors Summary

Color bräunlichgelb, braun weiß, farblos, grünlich, gelblich weiß
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages {0001} vollkommen
Solubility +++ Säuren
Crystal System trigonal, R3m

Chemism

Chemical formula

Mg6Fe23+(CO3)(OH)16·4H2O

Chemical composition

Eisen, Magnesium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 661.709158 u; Number of atoms in the formula: 56

Info

Empirical formula:

Mg6Fe2(CO3)(OH)16·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.66

24

42.86

1.0079470

24.1907280

Carbon

C

1.82

1

1.79

12.0107800

12.0107800

Oxygen

O

55.61

23

41.07

15.9994300

367.9868900

Magnesium

Mg

22.04

6

10.71

24.3050600

145.8303600

Iron

Fe

16.88

2

3.57

55.8452000

111.6904000

Analysis wt%

MgO : 35.84, Fe2O3 : 23.37, CO2 : 7.30, H2O : 33.63 (Ref: Univ.TorontoStud.Geol.Ser.39)

Strunz 9th edition incl. updates

5.DA.50

5: Carbonate (Carbonate, Nitrate)
D: Carbonate mit weitere Anionen, mit H2O
A: Mit mittelgroßen [Kationen]
50:Hydrotalkit-Gruppe

Lapis Classification

V/E.03-030

V: NITRATE, CARBONATE UND BORATE
E: Wasserhaltige Carbonate, mit fremden Anionen
3: Hydrotalkit-Gruppe

Classification by Hölzel

5.DD.520

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
D: Carbonates (+Anions +Water)
D: Hydrotalcite Series
5: Pyroaurite-Group

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Hydrotalcite Supergroup  ⇒ Hydrotalcite Group

Optical Properties

Color

bräunlichgelb, braun weiß, farblos, grünlich, gelblich weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.021

Birefringence chart\! Pyroaurite-3R title=Birefringence chart Pyroaurite-3R

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

1.564

RI value γ / ε

1.543

Ri mean

1.557

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

6.19

Cell parameters b (Å)

-

Cell parameters c (Å)

46.54

Cell parameters a/b or c/a

7.519

Cell parameters c/b

-

Z

3

Volumne (ų)

1544.324

X-Ray Powder Diffraction

7.77(100),
3.89(80),
2.62(50),
2.33(50),
1.97(50),
1.76(10),
1.55(20),
1.52(20)

XRD chart Pyroaurite-3R

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

Polytypes

Pyroaurite-2H

Mg6Fe23+[(OH)16|CO3]·4H2O

hexagonal

P63/mmc

6/mmm

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

Density (g/cm³)

2.07

2.134 ( ρ calc. Mineralienatlas )

Cleavages

{0001} vollkommen

Instability

+++ Säuren

Preface

Author (Name, Year)

Igelström, 1865

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 456

IMA group assignments

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

Comblainite

Ni4Co3+2(CO3)(OH)12·3H2O

5.DA.50

Desautelsite

Mg6Mn3+2(CO3)(OH)16·4H2O

trigonal : 3m, 3m : R3m, R3m

5.DA.50

Droninoite

Ni6Fe3+2Cl2(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

Hydrotalcite

Mg6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

Pyroaurite-3R

Mg6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

Reevesite

Ni6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

Stichtite

Mg6Cr2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

Takovite

Ni6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DA.50

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

Hydrotalcite

Mg6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

V/E.03-010

Stichtite

Mg6Cr2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

V/E.03-020

Pyroaurite-3R

Mg6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

V/E.03-030

Desautelsite

Mg6Mn3+2(CO3)(OH)16·4H2O

trigonal : 3m, 3m : R3m, R3m

V/E.03-040

Takovite

Ni6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

V/E.03-050

Reevesite

Ni6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

V/E.03-060

Comblainite

Ni4Co3+2(CO3)(OH)12·3H2O

V/E.03-070

Sergeevite

Ca2Mg11(CO3)9(HCO3)4(OH)4·6H2O

V/E.03-080

Karchevskyite

[Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11]

V/E.03-090

Putnisite

SrCa4Cr3+8(CO3)8SO4(OH)16·23H2O

orthorhombisch : mmm : Pnma

V/E.03-100

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

Hydrotalcite

Mg6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.500

Pyroaurite-3R

Mg6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.520

Iowaite

Mg6Fe3+2(OH)16Cl2·4H2O

trigonal : 3m : R3m

5.DD.530

Woodallite

Mg6(Cr,Fe3+)2(OH)16Cl2·4H2O

trigonal : 3m : R3m

5.DD.535

Stichtite

Mg6Cr2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.540

Reevesite

Ni6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.580

Droninoite

Ni6Fe3+2Cl2(OH)16·4H2O

trigonal : 3m : R3m

5.DD.583

Other languages

Spanish

Piroaurita

German

Pyroaurit-3R

French

Pyroaurite

English

Pyroaurite-3R

Russian

Пироаурит

old name

German

Pyroaurit

English

Pyroaurite

Alternative Name

Chrome-Pyroaurite

Igelstrmite

Igelströmite

Piroaurite

Pyroaurita

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

German pages

DeWikiPedia - search for: Pyroaurit-3R
Google-Bilder-Suche - search for: Pyroaurit-3R
Mineralogisch-Petrographisches-Institut Hamburg - search for: Pyroaurit-3R

English pages

Mindat - search for: Pyroaurite-3R
Webmineral - search for:Pyroaurite-3R
Handbook-of-Mineralogy - search for: Pyroaurite-3R
RRUFF - Raman, XRD and other mineral data - search for: Pyroaurite-3R
RRUFF - References and PDF downloads - search for: Pyroaurite-3R
American-Mineralogist-Crystal-Structure-Database - search for: Pyroaurite-3R
Athena - search for: Pyroaurite-3R

Russian pages

Webmineral.ru - search for: Пироаурит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Pyroaurit-3R
Crystal-Treasure.com - search for: Pyroaurit-3R
Bosse - search for: Pyroaurit-3R

Locations with GPS information




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