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Mineralpedia Details for Agardite-(Ce)

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Agardite-(Ce)

Agardite-(Ce)

Named as an analogue of agardite-Y which in turn was named in honor of Jules Agard, a geologist with the Bureau de Recherches Geologiques et Minieres in Orleans, France, and for the dominance of cerium over the other rare earth elements. Notable localities for Agardite-Ce include at the Majuba Hill mine in Nevada, USA, at the Clara mine and Neubulach in the Schwarzwald Mountains in Germany, at St. Hilary and Gwinear in Cornwall, England, at Laurion in Greece, and at Tsumeb in Namibia. A few other localities are known.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

Formula
Cu2+6Ce(AsO4)3(OH)6ยท3H2
Crystal System
Hexagonal 
Crystal Habit
Acicular 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
yellow green 
Streak
greenish white 
Class
Hexagonal - Dipyramidal 
Fracture
Conchoidal 
Hardness
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Agardite - (Ce) from Majuba Hill mine, Pershing Co., Nevada, United States

Agardite - (Ce)
            from Majuba Hill mine, Pershing Co., Nevada, United States

Green acicular spray to about 0.75mm.

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Agardite-(Ce) from Clara mine, Wolfach, Schwarzwald, Baden-Wurttemberg, Germany

Agardite-(Ce)
            from Clara mine, Wolfach, Schwarzwald, Baden-Wurttemberg, Germany

Fibrous green crystals to 2mm in calcite matrix.

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Agardite-(Ce) from Hilarion mine, Laurium dist., Attika, Greece

Agardite-(Ce)
            from Hilarion mine, Laurium dist., Attika, Greece

Very fine blue-green acicular Agardite-Ce crystals in sprays to 4mm and matted crystals in the vuggy areas of matrix.

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