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Georgiadesite

Pictures (13 Images total)

Georgiadesit
Views (File:
1412795934
): 1866, Rating: 8.5
Georgiadesit
Sechseckiger dicktafeliger farbloser Kristall mit Fiedlerit, Paralaurionit, BB = 1,8 mm, Fundort: Schlackenfundstelle Legraina, Sounion, Laurion, Attika, Griechenland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A027882, Donator: Peter Köhlen
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Sounion/Legraina
Mineral: Georgiadesite
Image: 1412795934
Rating: 8.5 (votes: 6)
License: Usage for Mineralienatlas project only
Georgiadesit (SNr: A027882)

Sechseckiger dicktafeliger farbloser Kristall mit Fiedlerit, Paralaurionit, BB = 1,8 mm, Fundort: Schlackenfundstelle Legraina, Sounion, Laurion, Attika, Griechenland.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2014-10-08
Locality: Legraina / Sounion / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Georgiadesit
Views (File:
1196854180
): 3720, Rating: 8.6
Georgiadesit
Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland; Bildbreite: 3 mm
Copyright: Christian Rewitzer; Contribution: Klinoklas
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Velatouri/Siri Minen/Cap Vrissaki
Mineral: Georgiadesite
Image: 1196854180
Rating: 8.6 (votes: 5)
License: Usage for Mineralienatlas project only
Georgiadesit

Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland; Bildbreite: 3 mm
Copyright: Christian Rewitzer
Contribution: Klinoklas 2007-12-05
Locality: Cap Vrissaki / Siri Minen / Velatouri / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Georgiadesit mit Paralaurionit
Views (File:
1196854345
): 2222, Rating: 7.57
Georgiadesit mit Paralaurionit
Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland; Bildbreite: 3 mm
Copyright: Christian Rewitzer; Contribution: Klinoklas
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Velatouri/Siri Minen/Cap Vrissaki
Mineral: Georgiadesite, Paralaurionite
Image: 1196854345
Rating: 7.57 (votes: 7)
License: Usage for Mineralienatlas project only
Georgiadesit mit Paralaurionit

Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland; Bildbreite: 3 mm
Copyright: Christian Rewitzer
Contribution: Klinoklas 2007-12-05
Locality: Cap Vrissaki / Siri Minen / Velatouri / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Georgiadesit
Views (File:
1140372260
): 1264
Georgiadesit
Fundort:Lavrion; Bildbreite:4 mm
Copyright: Stephan Wolfsried; Contribution: JHM
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt
Mineral: Georgiadesite
Image: 1140372260
Rating: 8 (votes: 3)
License: Usage for Mineralienatlas project only
Georgiadesit

Fundort:Lavrion; Bildbreite:4 mm

Copyright: Stephan Wolfsried
Contribution: JHM 2006-02-19
Locality: Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Georgiadesit auf Paralaurionit
Views (File:
1244106748
): 1147
Georgiadesit auf Paralaurionit
Bildbreite: 15 mm; Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland
Copyright: Fritz Schreiber; Contribution: Hg
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Velatouri/Siri Minen/Cap Vrissaki
Mineral: Georgiadesite
Image: 1244106748
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Georgiadesit auf Paralaurionit

Bildbreite: 15 mm; Fundort: Vrissaki Schlackenfundstelle, Lavrion, Attika, Griechenland
Copyright: Fritz Schreiber
Contribution: Hg 2009-06-04
Locality: Cap Vrissaki / Siri Minen / Velatouri / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color weiß, bräunlichgelb
Streak color weiß
Lustre Harzglanz
Hardness (Mohs) 3.5
Solubility +++ HNO3
Crystal System monoklin, P21/c

Chemism

Chemical formula

Pb4(As3+O3)Cl4(OH)

Chemical composition

Arsen, Blei, Chlor, Sauerstoff, Wasserstoff

Unit weight: 1110.580069 u; Number of atoms in the formula: 14

Info

Empirical formula:

Pb4(AsO3)Cl4(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.09

1

7.14

1.0079470

1.0079470
Oxygen

O

5.76

4

28.57

15.9994300

63.9977200
Chlorine

Cl

12.77

4

28.57

35.4532000

141.8128000
Arsenic

As

6.75

1

7.14

74.9216020

74.9216020
Lead

Pb

74.63

4

28.57

207.2100000

828.8400000

Analysis wt%

PbO : 80.39, As2O3 : 8.91, Cl : 12.77, H2O : 0.81 (Ref: berechnet)

Strunz 9th edition incl. updates

4.JB.70

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
J: Antimonite, Bismuthite, Sulfite, Selenite, Tellurite
B: [Arsenite], [Antimonite], [Bismuthite]; mit zusätzlichen [Anionen], ohne H20
70:Georgiadesit-Gruppe

Lapis Classification

IV/J.03-015

IV: OXIDE
J: Arsenite (mit As3+)
3: Arsenite mit [AsO3] 3--Inseln

Classification by Hölzel

5.JB.310

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
J: Arsenites
B: Arsenites (+Anions -Water)

Dana 8th edition

41.01.03.01

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
01: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A++)m (XO4)p Zq, with m:p>4:1

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß, bräunlichgelb

Streak color

weiß

Change in color

im Durchlicht farblos

Diaphaneity (Transparency)

durchscheinend

Lustre

Harzglanz

max. Birefringence

0.01
Birefringence chart\! Georgiadesite title=Birefringence chart Georgiadesite

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

2.17

RI value β

2.17

RI value γ / ε

2.18

Ri mean

2.173

2V angle

Biaxial (+) sehr groß

Orientation

Y = b; Z = c

Dispersion

stark; r < v

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

13.765

Cell parameters b (Å)

7.896

Cell parameters c (Å)

10.804

Cell parameters a/b or c/a

1.743

Cell parameters c/b

1.368

Cell parameters α

90°

Cell parameters β

102.57°

Cell parameters γ

90°

Z

4

Volume (ų)

1146.124

X-Ray Powder Diffraction

6.33(30),
5.30(30),
4.031(30),
3.955(50),
3.773(30),
3.164(50),
3.096(100),
2.967(30)
XRD chart Georgiadesite

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)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.436 (berechnet)

6.436 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3

(Co-)Type locality

(Co-)Type locality

Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Velatouri/Siri Minen/Cap Vrissaki

Type material

National School of Mines, Paris, Frankreich

American Museum of Natural History, New York City, New York, USA

National Museum of Natural History, Washington, D.C., USA

Collection number of type material

28427 (New York); 137839, 145938 (Washington);

Preface

Name from

Zu Ehren von Herrn Georgiadès, ein Direktor der Bergwerke aus Laurium Griechenland.

Author (Name, Year)

Lacroix & de Schulten, 1907

References

Comptes Rendus de l’Académie des Sciences de Paris 145 (1907), 783

Mineralogical Magazine 64 (2000), 879

Other languages

German

Georgiadesit

Spanish

Georgiadesita

English

Georgiadesite

French

Georgiadesite

Russian

Джорджиадесит

CNMNC symbol

Symbol

Ggd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 7nad31BD6kCA4TJ5tYOw3w
GUID (Global unique identifier) DF9D76EE-4350-40EA-80E1-3279B583B0DF
Database ID 1364