General Information:
Chemical Formula:
Pb5(AsO4)3Cl
Composition:
(Molecular Weight = 1,488.21 gm)
Arsenic 15.10 % As
Lead 69.61 % Pb
Chlorine 2.38 % Cl
Oxygen 12.90 % O
Empirical Formula:
Pb5(AsO4)3Cl
Name Origin:
From the Greek mimethes - "imitator."
Physical Properties:
Cleavage:
[1011] Imperfect
Color:
white, yellow, orange, brown, or red.
Density:
7.1 - 7.24, Average = 7.17
Diaphaniety:
Subtransparent to translucent
Habits:
Reniform - "Kidney like" in shape (e.g.. hematite)., Globular - Spherical, or nearly so, rounded forms (e.g. wavellite)., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmal ine).
Hardness:
3.5-4 - Copper Penny-Flourite
Luminescence:
None.
Luster:
Adamantine - Resinous
Streak:
white
More details...