General Information:
Chemical Formula:
(La,Ca)Cu6(AsO4)3(OH)6·3(H2O)
Composition:
(Molecular Weight = 1,068.32 gm)
Calcium 0.94 % Ca
Lanthanum 9.75 % La
Copper 35.69 % Cu
Arsenic 21.04 % As
Hydrogen 1.13 % H
Oxygen 31.45 % O
Empirical Formula:
La0.75Ca0.25Cu6(AsO4)3(OH)6·3(H2O)
IMA Status:
Approved IMA (Dana # Added)
Locality:
TL: USA, NM, Lincoln Co, Red Cloud mn
Name Origin:
Named for the composition and for Jules Agard, Geologist, Bureau de Recherches Geologiques et Minieres, Orleans, France.
Physical Properties:
Color:
colorless, yellowish green, or blue.
Density:
3.72
Diaphaniety:
Transparent
Habits:
Acicular - Occurs as needle-like crystals., ,
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous (Glassy)
Streak:
greenish white
More details...