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|Name:||For Jack Eaker, mining engineer.|
This page provides mineralogical data about Eakerite.
Classification of Eakerite
|IMA status:||Approved 1969|
|Strunz 8th edition ID:||8/G.02-10|
|Nickel-Strunz 10th (pending) edition ID:||9.CG.05|
9 : SILICATES (Germanates)
C : Cyclosilicates
G : [Si4O12]8- branched 4-membered single rings
|Dana 8th edition ID:||184.108.40.206|
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
1 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
|Hey's CIM Ref.:||16.14.12|
16 : Silicates Containing Aluminum and other Metals
14 : Aluminosilicates of Ti, Zr, Sn and Pb
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Type Occurrence of Eakerite
|Type Locality:||Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA|
|Year of Discovery:||1969|
Physical Properties of Eakerite
Crystallography of Eakerite
|Cell Parameters:||a = 15.83Å, b = 7.72Å, c = 7.44Å|
β = 101.31°
|Ratio:||a:b:c = 2.051 : 1 : 0.964|
|Unit Cell Volume:||V 891.57 Å³ (Calculated from Unit Cell)|
Optical Data of Eakerite
|RI values:||nα = 1.584 nβ = 1.586 nγ = 1.600|
|2V:||Measured: 35° , Calculated: 42°|
|Maximum Birefringence:||δ = 0.016|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Eakerite
|Simplified for copy/paste:||Ca2SnAl2Si6O18(OH)2·2H2O|
|Essential elements:||Al, Ca, H, O, Si, Sn|
|All elements listed in formula:||Al, Ca, H, O, Si, Sn|
Relationship of Eakerite to other Species
|Related Minerals - Hey's Index Grouping:|
Other Names for Eakerite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Eakerite
American Mineralogist: 56: 637.
American Mineralogist: 61: 956-962.
Internet Links for Eakerite
Localities for Eakerite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Riverton Mine, Kimberley, Francis Baard District, Northern Cape Province, South AfricaFrom Debbie Woolf, 20th Apr 2014 20:20:42