General Information:
Chemical Formula:
PbCa2Al(F,OH)9
Composition:
(Molecular Weight = 483.33 gm)
Calcium 16.58 % Ca
Aluminum 5.58 % Al
Hydrogen 0.21 % H
Lead 42.87 % Pb
Oxygen 3.31 % O
Fluorine 31.45 % F
Empirical Formula:
PbCa2AlF8OH
Environment:
In a small epithermal lead-copper-silver deposit in a silicified breccia.
IMA Status:
Approved IMA (Dana # Added)
Locality:
The Grand Reef mine in Laurel Canyon, about 6 km northeast of Klondyke, Aravaipa mining district, Graham County, Arizona. USA.
Name Origin:
For the relationshop with aravaipaite
Physical Properties:
Cleavage:
[100] Good
Color:
colorless or milk white.
Density:
4.85
Diaphaniety:
Transparent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Massive - Uniformly indistinguishable crystals forming large masses.,
Hardness:
2.5 - Finger Nail
Luster:
Vitreous (Glassy)
Streak:
white
More details...