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Ellenbergerite

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Ellenbergerit
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Ellenbergerit
violett; Fundort:Dora-Maira Massiv, Revello, Piemont,Italien; Bildbreite etwa 2mm
Copyright: Archiv: Berthold Stein (rtbstone); Contribution: rtbstone
Location: Italien/Piemont (Piemonte), Region/Cuneo, Provinz/Dora-Maira-Massiv
Mineral: Ellenbergerite
Image: 1233233966
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Ellenbergerit

violett; Fundort:Dora-Maira Massiv, Revello, Piemont,Italien; Bildbreite etwa 2mm

Copyright: Archiv: Berthold Stein (rtbstone)
Contribution: rtbstone 2009-01-29
Locality: Dora-Maira-Massiv / Cuneo, Provinz / Piemont (Piemonte), Region / Italien

Collectors Summary

Color violett (amethystfarben)
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 6.5
Crystal System hexagonal, P63
Morphology prismatisch, nadelig

Chemism

Chemical formula

Mg6(Mg,Ti,Zr)2(Al,Mg)6Si8O28(OH)10

Chemical composition

Aluminium, Magnesium, Silicium, Titan, Zirconium, Sauerstoff, Wasserstoff

Unit weight: 1222.5780939 u; Number of atoms in the formula: 70

Info

Empirical formula:

Mg6(Mg0.6Ti0.3Zr0.1)2(Al0.75Mg0.25)6Si8O28(OH)10

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.82

10

14.29

1.0079470

10.0794700

Oxygen

O

49.73

38

54.29

15.9994300

607.9783400

Magnesium

Mg

17.30

8.7

12.43

24.3050600

211.4540220

Aluminium

Al

9.93

4.5

6.43

26.9815382

121.4169219

Silicon

Si

18.38

8

11.43

28.0855300

224.6842400

Titanium

Ti

2.35

0.6

0.86

47.8671000

28.7202600

Zirconium

Zr

1.49

0.2

0.29

91.2242000

18.2448400

Strunz 9th edition incl. updates

9.AF.80

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
80:Ellenbergerit-Gruppe

Lapis Classification

VIII/B.30-010

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
30: Kationen mit Koordinationszahlen zwischen [8] und [12]; Beryllium- und Bor-Inselsilikate

Classification by Hölzel

9.AK.160

9: SILICATES
A: Nesosilicates
K: Boro and Beryllo Nesosilicates
1: C small; Dumortierite-Kornerupine-Group

Dana 8th edition

52.04.10.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
04: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or > [6] coordination

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

violett (amethystfarben)

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend-transparent

Lustre

Glasglanz

max. Birefringence

0.009

Birefringence chart\! Ellenbergerite title=Birefringence chart Ellenbergerite

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

1.679

RI value γ / ε

1.670

Ri mean

1.676

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6

Space Group number

173

Space Group

P63

Cell parameters a (Å)

12.255

Cell parameters b (Å)

-

Cell parameters c (Å)

4.932

Cell parameters a/b or c/a

0.402

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volume (ų)

641.476

X-Ray Powder Diffraction

3.61(50),
3.54(70),
3.11(100),
3.06(50),
2.653(70),
2.336(30),
2.186(50),
1.778(30)

XRD chart Ellenbergerite

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

Morphology

prismatisch, nadelig

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.5

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.17 (gemessen)

3.165 ( ρ calc. Mineralienatlas )

Preface

Occurrences

nur im Weißschiefer von Parigi Ultrahochdruckmetamorphit (Versenkungs-Tiefe 120 km)

Associations

eingewachsen in große Pyropkristalle mit Rutil, Talk und Muskovit (Phengit)

Rareness

weltweit nur im Dora-Maira-Massiv, dort aber häufiger

Author (Name, Year)

Chopin & Klaska & Medenbach & Dron, 1986

References

Contributions to Mineralogy and Petrology 92 (1986), 316

Other languages

German

Ellenbergerit

Spanish

Ellenbergerita

French

Ellenbergerite

English

Ellenbergerite

Russian

Элленбергерит

CNMNC (IMA)-Number

IMA 1984-066

CNMNC symbol

Symbol

Ell

IDs

GUSID (Global unique identifier short form) Osa-g1HCMUWAzYTwWcezsA
GUID (Global unique identifier) 83BEC63A-C251-4531-80CD-84F059C7B3B0
Database ID 1019