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|Name:||Named in 1925 by Alexander N. Winchell in 1899 after the type locality at Chestnut Hill, Easton, Pennsylvania, USA. The name eastonite was first used by Samuel Harbert Hamilton also after the type locality at Chestnut Hill, Easton, Pennsylvania, USA, but it not certain if Hamilton's mica was the same material as described by Winchell, although there has been much historical discussion of what eastonite actually is.|
Classification of Eastonite
|Strunz 8th edition ID:||8/H.11-150|
|Nickel-Strunz 10th (pending) edition ID:||9.EC.20|
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
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Type Occurrence of Eastonite
|Type Locality:||C.K. Williams & Co. Quarry (Williams Quarry), Chestnut Hill, Easton, Forks Township, Northampton Co., Pennsylvania, USA|
Crystallography of Eastonite
Chemical Properties of Eastonite
|Simplified for copy/paste:||KMg2Al(Al2Si2O10)(OH)2|
|Essential elements:||Al, H, K, Mg, O, Si|
|All elements listed in formula:||Al, H, K, Mg, O, Si|
Relationship of Eastonite to other Species
|Member of:||Mica Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Eastonite
|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 Eastonite
Hamilton, Samuel Harbert (1899) Mineral Collector, v. 6, p. 118.
Canadian Mineralogist: 36: 905-912.
Internet Links for Eastonite
Localities for Eastonite
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.