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Eakerite (Eakerita)

Pictures (7 Images total)

Eakerit
Views (File:
1410600694
): 630
Eakerit
Bildbreite: 1,7 mm, Fundort: Foote Lithium Co. Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite
Image: 1410600694
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Eakerit

Bildbreite: 1,7 mm, Fundort: Foote Lithium Co. Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried
Contribution: Hg 2014-09-13
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Eakerit
Views (File:
1292797732
): 1118
Eakerit
Größe: 2,32 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite
Image: 1292797732
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Eakerit

Größe: 2,32 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-12-19
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Eakerit
Views (File:
1410600657
): 600
Eakerit
Bildbreite: 1,7 mm, Fundort: Foote Lithium Co. Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite
Image: 1410600657
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Eakerit

Bildbreite: 1,7 mm, Fundort: Foote Lithium Co. Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried
Contribution: Hg 2014-09-13
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Eakerit
Views (File:
1282664893
): 1486, Rating: 8
Eakerit
Eakerit mit Pyrit besetzt, Kristallgröße: 3 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Jason B. Smith; Contribution: thdun5
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite
Image: 1282664893
Rating: 8 (votes: 7)
License: Usage for Mineralienatlas project only
Eakerit

Eakerit mit Pyrit besetzt, Kristallgröße: 3 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Jason B. Smith
Contribution: thdun5 2010-08-24
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Eakerit, Pyrit
Views (File:
1282664925
): 1006
Eakerit, Pyrit
Kristallgröße: 2,1 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Jason B. Smith; Contribution: thdun5
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite, Pyrite
Image: 1282664925
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Eakerit, Pyrit

Kristallgröße: 2,1 mm, Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Jason B. Smith
Contribution: thdun5 2010-08-24
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Eakerit
Views (File:
1166277582
): 603
Eakerit
Fundort Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Eakerite
Image: 1166277582
License: Usage for Mineralienatlas project only
Eakerit

Fundort Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-16
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 5.5
Solubility - Säuren, Alkalien
Crystal System monoklin, P21/a

Chemism

Chemical formula

Ca2SnAl2Si6O18(OH)2·2H2O

Chemical composition

Aluminium, Calcium, Silicium, Zinn, Sauerstoff, Wasserstoff

Unit weight: 779.3788984 u; Number of atoms in the formula: 39

Info

Empirical formula:

Ca2SnAl2Si6O18(OH)2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.78

6

15.38

1.0079470

6.0476820
Oxygen

O

45.16

22

56.41

15.9994300

351.9874600
Aluminium

Al

6.92

2

5.13

26.9815382

53.9630764
Silicon

Si

21.62

6

15.38

28.0855300

168.5131800
Calcium

Ca

10.28

2

5.13

40.0784000

80.1568000
Tin

Sn

15.23

1

2.56

118.7107000

118.7107000

Analysis wt%

SiO2 : 46.75, Al2O3 : 14.07, SnO2 : 18.59, CaO : 14.20, H2O : 6.70 (Ref: Mineralogical Record 70)

Strunz 9th edition incl. updates

9.CG.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
G: ~[Si4O12]9- verzweigte vierer-Einfachringe
05:Eakerit-Gruppe

Lapis Classification

VIII/G.02-010

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten

Classification by Hölzel

9.FG.330

9: SILICATES
F: Tektosilicates
G: Scapolite-Group

Dana 8th edition

72.01.05.01

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
01: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

max. Birefringence

0.016
Birefringence chart\! Eakerite title=Birefringence chart Eakerite

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

1.584

RI value β

1.586

RI value γ / ε

1.600

Ri mean

1.590

2V angle

Biaxial (+) 35°~

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

15.829

Cell parameters b (Å)

7.721

Cell parameters c (Å)

7.438

Cell parameters a/b or c/a

2.050

Cell parameters c/b

0.963

Cell parameters α

90°

Cell parameters β

101.32

Cell parameters γ

90°

Z

2

Volume (ų)

891.356

X-Ray Powder Diffraction

7.31(80),
6.905(50),
5.944(50),
5.257(90),
4.812(100),
3.999(50),
3.353(60),
3.021(80)
XRD chart Eakerite

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)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.93 (gemessen)

2.904 ( ρ calc. Mineralienatlas )

Instability

- Säuren, Alkalien

(Co-)Type locality

(Co-)Type locality

USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)

Preface

Author (Name, Year)

Leavens & White & Hey, 1970

References

Acta Crystallographica E63 (2007) i47

Other languages

German

Eakerit

Spanish

Eakerita

French

Eakerite

English

Eakerite

Russian

Икерит

Russian

Экерит

CNMNC (IMA)-Number

IMA 1969-019

CNMNC symbol

Symbol

Ea

Locations with GPS information

IDs

GUSID (Global unique identifier short form) bQ5QusdsZUKkoDagAtbrrQ
GUID (Global unique identifier) BA500E6D-6CC7-4265-A4A0-36A002D6EBAD
Database ID 990