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|Hardness:||4 - 5|
|Name:||For Scottish mineral collector James Edington (1787-1844).|
Zeolite Group. Edingtonite Subgroup.
Most edingtonites are orthorhombic (space group P212121), while some are tetragonal (space group P-421m) and called 'tetraedingtonite'. Orthorhombic edingtonites have (Si,Al) order, while tetragonal edingtonites are characterised by (Si,Al) disorder (symmetry increase due to disorder).
Classification of Edingtonite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||8/J.21-80|
|Nickel-Strunz 10th (pending) edition ID:||9.GA.15|
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
A : Zeolites with T5O10 Units – The Fibrous Zeolites
|Dana 8th edition ID:||126.96.36.199|
77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
|Hey's CIM Ref.:||16.12.7|
16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
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Type Occurrence of Edingtonite
|Type Locality:||Kilpatrick Hills, Strathclyde (Dunbartonshire), Scotland, UK|
Physical Properties of Edingtonite
|Hardness (Mohs):||4 - 5|
|X-Ray Powder Diffraction:|
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Optical Data of Edingtonite
|RI values:||nα = 1.538 nβ = 1.549 nγ = 1.554|
|Maximum Birefringence:||δ = 0.016|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v moderate|
Chemical Properties of Edingtonite
|Essential elements:||Al, Ba, H, O, Si|
|All elements listed in formula:||Al, Ba, H, O, Si|
Relationship of Edingtonite to other Species
|Member of:||Zeolite Group|
|Other Members of Group:|
|Structurally related to group(s):|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Edingtonite
|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 Edingtonite
Haidinger W, Turner E (1825): Description of edingtonite, a new mineral species. The Edinburgh Journal of Science 3, 316-320.
Brush G J, Dana E S (1879): On the mineral locality in Fairfield County, Connecticut, with the description of two additional new species. Second Paper, American Journal of Science and Arts 17, 359-368.
Acta Crystallographica: B32: 1623-1627.
Neues Jahrbuch für Mineralogie, Monatshefte (1984): 373-382.
Gatta, G.D. & Boffa Ballaran, T. (2004), New insight into the crystal structure of orthorhombic edingtonite: Evidence for a split Ba site: Mineralogical Magazine: 68: 167-175.
Gatta, G.D. & Boffa Ballaran, T., Comodi, P., & Zanazzi, P.F. (2004a), Isothermal equation of state and compressional behavior of tetragonal edingtonite: American Mineralogist 89: 633-639.
Gatta, G.D. & Boffa Ballaran, T., Comodi, P., & Zanazzi, P.F. (2004b), Comparative compressibility and equation of state of orthorhombic and tetragonal edingtonite: Physics and Chemistry of inerals: 31: 288-298.
Lee, Y., J.A. Hriljac, A. Studer & T. Vogt (2004b), Anisotropic compression of edingtonite and thomsonite to 6 GPa at room temperature: Physics and Chemistry of Minerals: 31: 22-27.
Internet Links for Edingtonite
Localities for Edingtonite
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: Forsythe Mine, Cooksville, Howard Co., Maryland, USAFrom Bill Cordua, 9th Dec 2013 04:44:50