General Information:
Chemical Formula:
PbAlF3(OH)2
Composition:
(Molecular Weight = 325.19 gm)
Aluminum 8.30 % Al
Hydrogen 0.62 % H
Lead 63.72 % Pb
Oxygen 9.84 % O
Fluorine 17.53 % F
Empirical Formula:
PbAlF3(OH)2
Environment:
In a quartz-lined vug.
IMA Status:
Approved IMA 1993
Locality:
The Grand Reef mine, near Klondyke, Graham County, Arizona, USA.
Name Origin:
For Dr. Arthur (Art) Roe (1912-1993).
Physical Properties:
Cleavage:
[100] Perfect, [010] Good
Color:
colorless.
Density:
5.36 - 5.42, Average = 5.39
Diaphaniety:
Transparent
Habits:
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite)., ,
Hardness:
2.5 - Finger Nail
Luster:
Vitreous (Glassy)
Streak:
white
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