
General Information:

Chemical Formula:
PbCa2Al(F,OH)9

Composition:
(Molecular Weight = 483.33 gm)
Calcium 16.58 %
CaAluminum 5.58 %
AlHydrogen 0.21 %
H Lead 42.87 %
PbOxygen 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...