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|Lustre:||Vitreous||Hardness:||4 - 5|
Zeolite Group. Phillipsite-Ca-Phillipsite-K Series, and the Phillipsite-K-Phillipsite-Na Series.
See also the closely related flörkeite.
Classification of Phillipsite-K
|Strunz 8th edition ID:||8/J.25-55|
|Nickel-Strunz 10th (pending) edition ID:||9.GC.10|
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
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Type Occurrence of Phillipsite-K
|Type Locality:||Capo di Bove, Alban Hills, Rome Province, Latium, Italy|
Physical Properties of Phillipsite-K
|Hardness (Mohs):||4 - 5|
Crystallography of Phillipsite-K
|X-Ray Powder Diffraction:|
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Optical Data of Phillipsite-K
|RI values:||nα = 1.483 - 1.505 nβ = 1.484 - 1.511 nγ = 1.486 - 1.514|
|2V:||Measured: 60° to 90°, Calculated: 70° to 72°|
|Maximum Birefringence:||δ = 0.003 - 0.009|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r > v or r < v|
Chemical Properties of Phillipsite-K
|Simplified for copy/paste:||(K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O|
|Essential elements:||Al, H, K, O, Si|
|All elements listed in formula:||Al, Ba, Ca, H, K, Na, O, Si|
Relationship of Phillipsite-K to other Species
|Series:||Forms a series with Phillipsite-Ca (see here)|
Forms a series with Phillipsite-Na (see here)
|Member of:||Zeolite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Phillipsite-K
|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 Phillipsite-K
Steinfink, H. (1962): The crystal structure of the zeolite, phillipsite. Acta Crystallogr., 15, 644-652.
American Mineralogist (1972): 57: 1125-1145.
Rinaldi, R., Pluth, J. J. and Smith, J. V. (1974): Zeolites of the phillipsite family. Refinement of the crystal structures of phillipsite and harmotome. Acta Crystallogr., B30, 2426-2433.
Mineralogical Magazine (1998): 62: 553-554.
Gatta, G. D., Cappelletti, P. & Langella, A. (2010): Crystal-chemistry of phillipsites from the Neapolitan Yellow Tuff. European Journal of Mineralogy 22, 779-786.
Internet Links for Phillipsite-K
Localities for Phillipsite-K
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.