General Information:
Chemical Formula:
PbAl2(CO3)2(OH)4·(H2O)
Composition:
(Molecular Weight = 467.23 gm)
Aluminum 11.55 % Al
Hydrogen 1.29 % H
Lead 44.35 % Pb
Carbon 5.14 % C
Oxygen 37.67 % O
Empirical Formula:
PbAl2(CO3)2(OH)4·(H2O)
Locality:
Dundas and Mt. Read, Tasmania.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[010] Perfect
Color:
sky blue, white, or light green.
Density:
3.41 - 3.55, Average = 3.48
Diaphaniety:
Transparent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Acicular - Occurs as needle-like crystals., Spherical - Spherical, rounded aggregates.
Hardness:
2 - Gypsum
Luster:
Vitreous - Silky
Streak:
white
More details...