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Eakerite

Pictures (7 Images total)

Eakerit
Views (Image: 1292797732): 591
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
Eakerit
Views (Image: 1410600657): 294
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
Eakerit
Views (Image: 1410600694): 312
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
Eakerit
Views (Image: 1282664893): 1250, 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 2010-08-24
Eakerit, Pyrit
Views (Image: 1282664925): 682
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
Eakerit
Views (Image: 1166277582): 475
Eakerit

Fundort Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-16

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

Volumne (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

Author (Name, Year)

Leavens & White & Hey, 1970

References

Acta Crystallographica E63 (2007) i47

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Eakerite

Ca2SnAl2Si6O18(OH)2·2H2O

monoklin : 2/m : P21/a

9.CG.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Eakerite

Ca2SnAl2Si6O18(OH)2·2H2O

monoklin : 2/m : P21/a

VIII/G.02-010

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Ussingite

Na2AlSi3O8(OH)

triklin : 1 : P1

9.FG.300

Eakerite

Ca2SnAl2Si6O18(OH)2·2H2O

monoklin : 2/m : P21/a

9.FG.330

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Ekanite

ThCa2Si8O20

tetragonal : 422 : I422

72.01.01.01

Thornasite

Na12Th3(Si8O19)4 ·18H2O

trigonal : 3m : R3c

72.01.02.01

Prehnite

Ca2Al2Si3O10(OH)2

orthorhombisch : mm2 : P2cm

72.01.03.01

Amstallite

CaAl(Si,Al)4O8(OH)4·(H2O,Cl)

monoklin : 2/m : C2/c

72.01.04.01

Rudenkoite

Sr3Al3.5Si3.5O10(OH,O)8Cl2·H2O

monoklin : 2/m, 2, m : P2/m, P2, Pm

72.01.04.02

Eakerite

Ca2SnAl2Si6O18(OH)2·2H2O

monoklin : 2/m : P21/a

72.01.05.01

Other languages

German

Eakerit

Spanish

Eakerita

French

Eakerite

English

Eakerite

Russian

Икерит

Russian

Экерит

IMA Number

IMA 1969-019

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

German pages

DeWikiPedia - search for: Eakerit
Google-Bilder-Suche - search for: Eakerit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Eakerit

English pages

Mindat - search for: Eakerite
Webmineral - search for: Eakerite
Handbook-of-Mineralogy - search for: Eakerite
RRUFF Database-of-Raman-spectroscopy - search for: Eakerite
American-Mineralogist-Crystal-Structure-Database - search for: Eakerite
Athena - search for: Eakerite

Russian pages

Webmineral.ru - search for: Экерит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Eakerit
Crystal-Treasure.com - search for: Eakerit
Bosse - search for: Eakerit



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