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|System:||Hexagonal||Colour:||bluish green to yellow ...|
|Lustre:||Sub-Vitreous, Resinous, Waxy||Hardness:||3 - 4|
This page provides mineralogical data about Agardite-(Y).
Classification of Agardite-(Y)
|IMA status:||Approved 1968|
|Strunz 8th edition ID:||7/D.53-40|
|Nickel-Strunz 10th (pending) edition ID:||8.DL.15|
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
|Dana 8th edition ID:||184.108.40.206|
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)7(XO4)3Zq·xH2O
|Hey's CIM Ref.:||20.4.13|
20 : Arsenates (also arsenates with phosphate, but without other anions)
4 : Arsenates of Group III metals (Al, rare earths)
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Type Occurrence of Agardite-(Y)
|Type Locality:||Bou Skour Mine, Bou Skour District, Djebel Saghro (Jbel Saghro), Ouarzazate Province, Souss-Massa-Draâ Region, Morocco|
|Place of Conservation of Type Material:||Serv. Geol. Maroc, Rabat, Morocco; |
National School of Mines, Paris, France;
The Natural History Museum, London, England, 1978,24.
|Year of Discovery:||1968|
|Geological Setting of type material:||Oxidation zone of copper veins or deposits|
Occurrences of Agardite-(Y)
|Geological Setting:||In the oxidation zone of some copper deposits.|
Physical Properties of Agardite-(Y)
|Lustre:||Sub-Vitreous, Resinous, Waxy|
|Diaphaneity (Transparency):||Transparent, Translucent|
|Colour:||bluish green to yellow green|
|Hardness (Mohs):||3 - 4|
|Density (measured):||3.61 - 3.72 g/cm3|
|Density (calculated):||3.66 g/cm3|
Crystallography of Agardite-(Y)
|Class (H-M):||6/m - Dipyramidal|
|Space Group Setting:||P63/m|
|Cell Parameters:||a = 13.583Å, c = 5.895Å|
|Ratio:||a:c = 1 : 0.434|
|Unit Cell Volume:||V 941.90 Å³ (Calculated from Unit Cell)|
|Morphology:||Crystals are acicular hexagonal prisms, elongated along , a few mm long, may be stepped or hollow tubes; in radiating fibrous aggregates.|
|X-Ray Powder Diffraction:|
|Comments:||All Agardites seem to be indistinguishable by XRD|
Optical Data of Agardite-(Y)
|RI values:||nω = 1.701 - 1.723 nε = 1.770 - 1.815|
|Maximum Birefringence:||δ = 0.069|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Agardite-(Y)
|Essential elements:||As, Cu, H, O, Y|
|All elements listed in formula:||As, Ca, Cu, H, O, Y|
Relationship of Agardite-(Y) to other Species
|Member of:||Mixite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Agardite-(Y)
|Fluorescence in UV light:||Not fluorescent|
|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 Agardite-(Y)
Bull. Min. (1969): 92: 420-434.
American Mineralogist: 55: 1447.
Best Localities for Agardite-(Y)
|Best of Species:||Agardite-(Y)|
Internet Links for Agardite-(Y)
Localities for Agardite-(Y)
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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