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Fornacite

Pictures (40 Images total)

Fornacit xx
Views (File:
1505643234
): 1445
Fornacit xx
Lavrion, Barbara, Attika/Griechenland; Bildbreite 2 mm erstellt aus 66 Aufnahmen mit der Stacking-Methode
Copyright: Karlheinz Grosch; Contribution: Karlheinz Grosch
Collection: Karlheinz Grosch
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Sounion/Cato Sounio Minen/Barbara Mine
Mineral: Fornacite
Image: 1505643234
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Fornacit xx

Lavrion, Barbara, Attika/Griechenland; Bildbreite 2 mm erstellt aus 66 Aufnahmen mit der Stacking-Methode

Collection: Karlheinz Grosch
Copyright: Karlheinz Grosch
Contribution: Karlheinz Grosch 2017-09-17
Locality: Barbara Mine / Cato Sounio Minen / Sounion / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Fornacit
Views (File:
1394191917
): 866
Fornacit
Grube Barbara, Sounion, Laurion (Lavrion), Attika, Griechenland. Bildbreite 0,4 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Sounion/Cato Sounio Minen/Barbara Mine
Mineral: Fornacite
Image: 1394191917
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Fornacit

Grube Barbara, Sounion, Laurion (Lavrion), Attika, Griechenland. Bildbreite 0,4 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2014-03-07
Locality: Barbara Mine / Cato Sounio Minen / Sounion / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Fornacit
Views (File:
1506408908
): 923
Fornacit
Grube Bangertsheck/Klein-Weinbach/Taunus. Bildbreite 1,8 mm
Copyright: Lithos; Contribution: Lithos
Location: Deutschland/Hessen/Gießen, Bezirk/Limburg-Weilburg, Landkreis/Weinbach/Klein-Weinbach/Grube Bangertsheck
Mineral: Fornacite
Image: 1506408908
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Fornacit  E
Analysed with energy dispersive X-ray spectroscopy EDX

Grube Bangertsheck/Klein-Weinbach/Taunus. Bildbreite 1,8 mm

Copyright: Lithos
Contribution: Lithos 2017-09-26
Locality: Grube Bangertsheck / Klein-Weinbach / Weinbach / Limburg-Weilburg, Landkreis / Gießen, Bezirk / Hessen / Deutschland
Fornacit
Views (File:
1244407612
): 1893, Rating: 6.86
Fornacit
teilweise von Mimetesit (?) überwachsen; Moon Anchor Mine, Arizona
Copyright: schlothi; Contribution: schlothi
Collection: schlothi
Location: USA/Arizona/Maricopa Co./Big Horn Mts/Osborn District/Moon Anchor Mine
Mineral: Fornacite
Image: 1244407612
Rating: 6.86 (votes: 7)
License: Usage for Mineralienatlas project only
Fornacit

teilweise von Mimetesit (?) überwachsen; Moon Anchor Mine, Arizona

Collection: schlothi
Copyright: schlothi
Contribution: schlothi 2009-06-07
Locality: Moon Anchor Mine / Osborn District / Big Horn Mts / Maricopa Co. / Arizona / USA
Fornacit
Views (File:
1179061112
): 1575
Fornacit
Lavrion, Sounion, Stollen Nr. unbekannt
Copyright: Fritz Schreiber; Contribution: Erik
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Sounion
Mineral: Fornacite
Image: 1179061112
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Fornacit

Lavrion, Sounion, Stollen Nr. unbekannt

Copyright: Fritz Schreiber
Contribution: Erik 2007-05-13
Locality: Sounion / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grün, gelb, olivgrün, grünlichgelb
Streak color grünlichgelb
Solubility +++ HCl
Crystal System monoklin, P21/c

Chemism

Chemical formula

(Pb,Cu)3[(Cr,As)O4]2(OH)

Chemical composition

Arsen, Blei, Chrom, Kupfer, Sauerstoff, Wasserstoff

Unit weight: 774.340083 u; Number of atoms in the formula: 15

Info

Empirical formula:

(Pb0.75Cu0.25)3[(Cr0.75As0.25)O4]2(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.13

1

6.67

1.0079470

1.0079470

Oxygen

O

18.60

9

60.00

15.9994300

143.9948700

Chromium

Cr

10.07

1.5

10.00

51.9961600

77.9942400

Copper

Cu

6.15

0.75

5.00

63.5463000

47.6597250

Arsenic

As

4.84

0.5

3.33

74.9216020

37.4608010

Lead

Pb

60.21

2.25

15.00

207.2100000

466.2225000

Analysis wt%

PbO : 57.16, CuO : 10.91, Fe2O3 : 0.40, CrO3 : 11.78, As2O5 : 15.03, P2O5 : 0.66, H2O : 3.73 (Ref: Bulletin de Mineralogie 62)

Strunz 9th edition incl. updates

7.FC.10

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
F: Chromate
C: Mit PO4, AsO4, SiO4
10:Fornacit-Gruppe

Lapis Classification

VI/F.02-020

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
F: Chromate [CrO4] 2-

Classification by Hölzel

7.FB.220

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
F: Chromates
B: Chromates (+Anions -Water)

Dana 8th edition

43.04.03.02

43: Compound Phosphates, etc.
04: Compound Phosphates, etc. (Anhydrous Compound Anions With Hydroxyl or Halogen)
03: Vauquelinite Group

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

grün, gelb, olivgrün, grünlichgelb

Streak color

grünlichgelb

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.10

Birefringence chart\! Fornacite title=Birefringence chart Fornacite

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

2.14

RI value γ / ε

2.24

2V angle

Biaxial (+) lg

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

8.101

Cell parameters b (Å)

5.893

Cell parameters c (Å)

17.547

Cell parameters a/b or c/a

1.375

Cell parameters c/b

2.978

Cell parameters α

90°

Cell parameters β

110.0

Cell parameters γ

90°

Z

4

Volume (ų)

787.161

Crystal structure

Aufgeklärt, siehe
D. A. Ksenofontov et al.: Refinement of the crystal structure of fornacite using the rietveld method. Doklady Earth Sciences Volume 456, Issue 1 (2014) pp 520-523.

X-Ray Powder Diffraction

8.22(50),
4.80(90),
3.31(100),
2.98(100),
2.88(100),
2.80(100),
2.71(90)

XRD chart Fornacite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

6.27

6.534 ( ρ calc. Mineralienatlas )

Radioactivity

keine bekannt

Instability

+++ HCl

Preface

Author (Name, Year)

Lacroix, 1915

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 192

Other languages

Dutch

Fornaciet

German

Fornacit

Spanish

Fornacita

English

Fornacite

French

Fornacite

Russian

Форнасит

Alternative Name

German

Furnacit

Spanish

Furnacita

Furnacite

CNMNC symbol

Symbol

For

Locations with GPS information

IDs

GUSID (Global unique identifier short form) E-vUNMqeYEmUXBI_-Po55Q
GUID (Global unique identifier) 34D4EB13-9ECA-4960-945C-123FF8FA39E5
Database ID 1266