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Eirikite

Pictures (3 Images total)

Eirikit
Views (Image: 1353440891): 936
Eirikit (SNr: A027120)

Stängelige faserige strohgelbe Kristall, BB = 13 mm, Fundort: Vesle Arøy, Insel, Langesundsfjord, Larvik, Vestfold, Norwegen.

Collection: Lithothek der Münchener Micromounter
Copyright: Heribert Rotter
Contribution: Münchener Micromounter 2012-11-20
Locality: Vesle Arøy, Insel / Langesundsfjord / Larvik / Vestfold og Telemark, Provinz / Norwegen
Eirikit
Views (Image: 1338890429): 551
Eirikit (SNr: A027441)

Faserige beige Kristalle, BB = 5,5 mm, gefunden Juni 2010, Fundort: Vesle Arøy, Insel, Langesundsfjord, Larvik, Vestfold, Norwegen.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2012-06-05
Locality: Vesle Arøy, Insel / Langesundsfjord / Larvik / Vestfold og Telemark, Provinz / Norwegen
faseriger beigefarbener Eirikit
Views (Image: 1615909363): 93
faseriger beigefarbener Eirikit (SNr: A036987)

Norwegen/Vestfold og Telemark, Provinz/Larvik/Langesundsfjord/Vesle Arøy, Insel, BB = 6,9 mm

Collection: Lithothek der Münchener Micromounter
Copyright: husi
Contribution: Münchener Micromounter 2021-03-16
Locality: Vesle Arøy, Insel / Langesundsfjord / Larvik / Vestfold og Telemark, Provinz / Norwegen

Collectors Summary

Color weiß bis farblos
Streak color weiß
Lustre Glasglanz bis Seidenglanz
Hardness (Mohs) 6
Cleavages gut (10-10)
Fracture muschelig
Solubility - warme 6m HCl
Crystal System trigonal, P3m1

Chemism

Chem­ical formula

KNa6Be2(Si15Al3)O39F2

Chem­ical com­po­si­tion

Aluminium, Beryllium, Natrium, Silicium, Fluor, Kalium, Sauerstoff

Unit weight: 1359.2634369 u; Number of atoms in the formula: 68

Info

Empirical formula:

KNa6Be2(Si15Al3)O39F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Beryllium

Be

1.33

2

2.94

9.0121823

18.0243646

Oxygen

O

45.91

39

57.35

15.9994300

623.9777700

Fluorine

F

2.80

2

2.94

18.9984033

37.9968065

Sodium

Na

10.15

6

8.82

22.9897702

137.9386212

Aluminium

Al

5.96

3

4.41

26.9815382

80.9446146

Silicon

Si

30.99

15

22.06

28.0855300

421.2829500

Potassium

K

2.88

1

1.47

39.0983100

39.0983100

Anal­y­sis wt%

SiO2 : 66.03, Al2O3 : 11.08, BeO : 3.65, Na2O : 13.38, K2O : 3.13, F : 2.70 (Ref: European Journal of Mineralogy 2010)

Strunz 9th edi­tion incl. updates

9.EH.25

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
H: Übergangsstrukturen zwischen Schichtsilikaten und anderen Silikaten
25:Leifit-Gruppe

Lapis Clas­sifica­tion

VIII/J.10-015

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
10: Mit tetraederfremden Anionen

Clas­sifica­tion by Hölzel

9.FJ.340

9: SILICATES
F: Tektosilicates
J: Singly connected 4-Ring Chains

IMA sta­tus

anerkannt - IMA Veröffentlichungen August 2007

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

weiß bis farblos

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend bis transparent

Lus­tre

Glasglanz bis Seidenglanz

max. Birefrin­gence

0.004

Birefringence chart\! Eirikite title=Birefringence chart Eirikite

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

1.517

RI value γ / ε

1.521

Ri mean

1.518

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell param­e­ters a (Å)

14.387

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

4.873

Cell param­e­ters a/b or c/a

0.339

Cell param­e­ters c/b

-

Z

1

Volumne (ų)

873.509

Kristall struc­ture

aufgeklärt, siehe A.O. Larsen et al., 2010

X-Ray Pow­der Diffrac­tion

4.710(29), 4.153(21), 3.386(70), 3.161(100), 3.115(17), 2.466(31), 2.398(19), 2.217(20)

XRD chart Eirikite

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)

6

VHN (Hard­ness Vick­ers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.59(1) gem.. 2.577 ber.

2.584 ( ρ calc. Mineralienatlas )

Cleav­ages

gut (10-10)

Frac­ture

muschelig

Tenac­ity

spröde

Insta­bil­ity

- warme 6m HCl

Chem­ical Prop­er­ties and Tests

unlöslich in warmer Salzsäure

Preface

Name from

Eirik Raude (Erik dem Roten, ≈ 950 bis ≈ 1003), der als Flüchtling aus Island kommend im Jahr 983 Grönland entdeckte.

Author (Name, Year)

A.O. Larsen et al., 2010

References

Alf Olav Larsen, Uwe Kolitsch, Robert A. Gault, Gerald Giester: Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. Eur J Mineral 22 (2010) S.875-880.

IMA Veröffentlichungen August 2007
Mineralien Welt 01/11, Neue Mineralien, Steffen Jahn

Other languages

German

Eirikit

English

Eirikite

Russian

Эйрикит

CNMNC (IMA)-Number

IMA 2007-017

CNMNC symbol

Symbol

Eir

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

German pages

DeWikiPedia - search for: Eirikit
Google-Bilder-Suche - search for: Eirikit
Mineralienatlas.de (Forum) - search for: Eirikit

English pages

Mindat - search for: Eirikite
Webmineral - search for:Eirikite
Handbook-of-Mineralogy - search for: Eirikite
RRUFF - Raman, XRD and other mineral data - search for: Eirikite
RRUFF - References and PDF downloads - search for: Eirikite
American-Mineralogist-Crystal-Structure-Database - search for: Eirikite
Strahlen.org - search for: Eirikite

Russian pages

Webmineral.ru - search for: Эйрикит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Eirikit
Crystal-Treasure.com - search for: Eirikit
Bosse - search for: Eirikit
Edelsteine Neuburg - Gundolf Fischer - search for: Eirikit

Locations with GPS information