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Agardite-(Dy)

Mineralogy Database Dictionary

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Agardite-(Dy)

General Information:
 Chemical Formula:
(Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O)
 Composition:
(Molecular Weight = 1,083.41 gm)
Calcium 0.37 % Ca
Lanthanum 2.56 % La
Dysprosium 9.00 % Dy
Copper 35.19 % Cu
Arsenic 20.75 % As
Hydrogen 1.12 % 
Oxygen 31.01 % 
 Empirical Formula:
Dy0.6La0.2Ca0.1Cu6(AsO4)3(OH)6·3(H2O)
 IMA Status:
Not IMA Approved (Dana # Added)
 Name Origin:
Named for the composition and for Jules Agard, Geologist, Bureau de Recherches Geologiques et Minieres, Orleans, France.
Physical Properties:
 Color:
grass green.
 Density:
3.72
 Diaphaniety:
Transparent
 Hardness:
3-4 - Calcite-Fluorite
 Luster:
Vitreous (Glassy)
 Streak:
greenish white
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