General Information:
Chemical Formula:
Pb5(PO4)3Cl
Composition:
(Molecular Weight = 1,356.37 gm)
Phosphorus 6.85 % P
Lead 76.38 % Pb
Chlorine 2.61 % Cl
Oxygen 14.15 % O
Empirical Formula:
Pb5(PO4)3Cl
Name Origin:
From the Greek pyr - "fire" and morfe - "form."
Physical Properties:
Cleavage:
[1011] Imperfect
Color:
green, yellow, brown, grayish white, or yellowish red.
Density:
6.7 - 7, Average = 6.85
Diaphaniety:
Subtransparent to subtranslucent
Habits:
Reniform - "Kidney like" in shape (e.g.. hematite)., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Globular - Spherical, or nearly so, rounded forms (e.g. wavell ite).
Hardness:
3.5-4 - Copper Penny-Flourite
Luminescence:
None.
Luster:
Adamantine - Resinous
Streak:
white
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