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Ecdemite

Pictures (16 Images total)

Paralaurionit mit Ecdemit
Views (File:
1380452707
): 2799, Rating: 8.67
Paralaurionit mit Ecdemit
Bildbreite: 6 mm; Fundort: Schlackenfundstelle Legraina, Sounion, Laurion, Attika, Griechenland
Copyright: Fritz Schreiber; Contribution: Hg
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Sounion/Legraina
Mineral: Ecdemite, Paralaurionite
Image: 1380452707
Rating: 8.67 (votes: 6)
License: Usage for Mineralienatlas project only
Paralaurionit mit Ecdemit

Bildbreite: 6 mm; Fundort: Schlackenfundstelle Legraina, Sounion, Laurion, Attika, Griechenland
Copyright: Fritz Schreiber
Contribution: Hg 2013-09-29
Locality: Legraina / Sounion / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Ekdemit
Views (File:
1253279190
): 1660
Ekdemit
Bildbreite: 1 mm; Fundort: Lavrion Hafen, Lavrion, Attika, Griechenland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Lavrion (Laurion)/Lavrio (Laurion; Laurium), Hafen
Mineral: Ecdemite
Image: 1253279190
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Ekdemit

Bildbreite: 1 mm; Fundort: Lavrion Hafen, Lavrion, Attika, Griechenland
Copyright: Stephan Wolfsried
Contribution: Hg 2009-09-18
Locality: Lavrio (Laurion; Laurium), Hafen / Lavrion (Laurion) / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Ekdemit
Views (File:
1335292497
): 1171
Ekdemit
Feinkristalliene blaßgelbe Kristalle, BB = <1 mm, Fundort: Passa Limani (Schlackenfundstelle), Lavrion, Attika, Griechenland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A010110, Donator: Manfred Seitz
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Passa Limani/Passa Limani Bucht (Pacha Limani), Schlackenfundstelle
Mineral: Ecdemite
Image: 1335292497
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Ekdemit (SNr: A010110)

Feinkristalliene blaßgelbe Kristalle, BB = <1 mm, Fundort: Passa Limani (Schlackenfundstelle), Lavrion, Attika, Griechenland.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2012-04-24
Locality: Passa Limani Bucht (Pacha Limani), Schlackenfundstelle / Passa Limani / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Ekdemit (früher Heliophyllit)
Views (File:
1251028307
): 2371
Ekdemit (früher Heliophyllit)
Fo.: Pacha Limani, Lavrion, Attika, Griechenland, gelbe, blättrige XX auf Schlacke BB: 1,0mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A003416, Donator: Dorothea Kulicke
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Passa Limani/Passa Limani Bucht (Pacha Limani), Schlackenfundstelle
Mineral: Ecdemite
Image: 1251028307
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Ekdemit (früher Heliophyllit) (SNr: A003416)

Fo.: Pacha Limani, Lavrion, Attika, Griechenland, gelbe, blättrige XX auf Schlacke BB: 1,0mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2009-08-23
Locality: Passa Limani Bucht (Pacha Limani), Schlackenfundstelle / Passa Limani / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Ekdemit
Views (File:
1253279141
): 1347
Ekdemit
Bildbreite: 2 mm; Fundort: Lavrion Hafen, Lavrion, Attika, Griechenland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Schlackenfundstellen/Lavrion (Laurion)/Lavrio (Laurion; Laurium), Hafen
Mineral: Ecdemite
Image: 1253279141
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Ekdemit

Bildbreite: 2 mm; Fundort: Lavrion Hafen, Lavrion, Attika, Griechenland
Copyright: Stephan Wolfsried
Contribution: Hg 2009-09-18
Locality: Lavrio (Laurion; Laurium), Hafen / Lavrion (Laurion) / Lavrion (Laurion), Schlackenfundstellen / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grünlichgelb, gelb
Streak color blassgelb
Hardness (Mohs) 2.50 - 3.00
Solubility +++ Säuren, Alkalien
Crystal System monoklin, P21

Chemism

Chemical formula

Pb6As23+O7Cl4

Empirical formula (analysis)

Pb5.99As3+1.94Sb3+0.06Cl4.03O6.97

Chemical composition

Arsen, Blei, Chlor, Sauerstoff

Unit weight: 1648.23383698 u; Number of atoms in the formula: 18.99

Info

Empirical formula:

Pb5.99As1.94Sb0.06Cl4.03O6.97

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

6.77

6.97

36.70

15.9994300

111.5160271
Chlorine

Cl

8.67

4.03

21.22

35.4532000

142.8763960
Arsenic

As

8.82

1.94

10.22

74.9216020

145.3479079
Antimony

Sb

0.44

0.06

0.32

121.7601000

7.3056060
Lead

Pb

75.30

5.99

31.54

207.2100000

1,241.1879000

Analysis wt%

PbO : 83.45, As2O3 : 10.60, Cl : 8.00 (Ref: Dana, 7th ed. 2)

Strunz 9th edition incl. updates

3.DC.65

3: Halide (Fluoride, Chloride, Bromide, Iodide)
D: Oxihalide, Hydroxyhalide und verwandte Doppel-Halide
C: Mit [Pb] ([As], [Sb], [Bi]) ohne [Cu]
65:Heliophyllit-Gruppe

Lapis Classification

III/D.10-100

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
D: Oxihalogenide
10: Oxihalogenide mit Pb-Bi-Sb und verwandte Verbindungen

Classification by Hölzel

3.EC.210

3: HALIDES
E: Halides with mostly Pb,As,Sb,Bi,Te
C: With As,Sb,Bi and mostly Pb

Dana 8th edition

46.02.01.01

46: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
02: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites with miscellaneous formulae

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlichgelb, gelb

Streak color

blassgelb

max. Birefringence

0.07
Birefringence chart\! Ecdemite title=Birefringence chart Ecdemite

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

2.32

RI value γ / ε

2.25

Ri mean

2.297

2V angle

Uniaxial (-)

Optical Data Luminescence

Color LW-UV (365nm)

  

gelb

LW-UV Intensity

stark

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

4

Space Group

P21

Cell parameters a (Å)

10.8276(38)

Cell parameters b (Å)

10.8265(21)

Cell parameters c (Å)

6.9705(14)

Cell parameters a/b or c/a

1

Cell parameters c/b

0.644

Cell parameters α

90°

Cell parameters β

113.261(24)∘

Cell parameters γ

90°

Z

8

Volume (ų)

750.698

X-Ray Powder Diffraction

3.66(80),
2.85(100),
2.72(80),
2.07(70),
1.920(60),
1.670(40),
1.652(50),
1.591(70)
XRD chart Ecdemite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.50 - 3.00

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.14 (gemessen)

29.165 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren, Alkalien

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt/Långban Fe-Mn-(Ba-As-Pb-Sb) Lagerstätte

Preface

Author (Name, Year)

Nordenskiöld, 1877

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 173

Perchiazzi, Natale; Hålenius, Ulf; Vignola, Pietro; Demitri, Nicola - Crystal-chemical study of ecdemite from Harstigen, a new naturalmember of the layered lead oxyhalides group - European Journal of Mineralogy Volume 31 Number 3 (2019), p. 609 - 617 https://dx.doi.org/10.1127/ejm/2019/0031-2853

Heliophyllite: a discredited mineral species identical to ecdemite - Eur. J. Mineral., 32, 265–273, 2020 https://doi.org/10.5194/ejm-32-265-2020

Other languages

Spanish

Ecdemita

French

Ecdemite

English

Ecdemite

German

Ekdemit

Russian

Экдемит

Alternative Name

German

Ecdemit

Spanish

Ekdemita

Ekdemite

CNMNC symbol

Symbol

Ecd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) mtTOMk4fW0OFhFjtKTU_dA
GUID (Global unique identifier) 32CED49A-1F4E-435B-8584-58ED29353F74
Database ID 1016