General Information:
Chemical Formula:
CaCu5(AsO4)2(CO3)(OH)4·6(H2O)
Composition:
(Molecular Weight = 1,557.97 gm)
Calcium 5.14 % Ca
Copper 36.71 % Cu
Arsenic 19.24 % As
Hydrogen 1.94 % H
Oxygen 36.97 % O
Empirical Formula:
Ca2Cu9(AsO4)4(OH)10·10(H2O)
Name Origin:
Named after the Tyrol Mountains, Austia.
Physical Properties:
Cleavage:
[001] Perfect
Color:
blue, blue green, green blue, or light green.
Density:
3.1 - 3.2, Average = 3.15
Diaphaniety:
Translucent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Platy - Sheet forms (e.g. micas)., Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
None.
Luster:
Vitreous - Pearly
Streak:
pale blue
More details...