General Information:
Chemical Formula:
(Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O)
Composition:
(Molecular Weight = 1,069.23 gm)
Calcium 0.94 % Ca
Cerium 9.83 % Ce
Copper 35.66 % Cu
Arsenic 21.02 % As
Hydrogen 1.13 % H
Oxygen 31.42 % O
Empirical Formula:
Ce0.75Ca0.25Cu6(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:
bluish, yellow green, or sky blue.
Density:
3.72
Diaphaniety:
Transparent
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous (Glassy)
Streak:
greenish white
More details...