General Information:
Chemical Formula:
MgAl2(PO4)2(OH)2
Composition:
(Molecular Weight = 302.23 gm)
Magnesium 8.04 % Mg
Aluminum 17.86 % Al
Phosphorus 20.50 % P
Hydrogen 0.67 % H
Oxygen 52.94 % O
Empirical Formula:
MgAl2(PO4)2(OH)2
Name Origin:
From the Arabic azul - "sky" and the Greek lithos - "stone."
Physical Properties:
Cleavage:
[001] Indistinct, [???] Indistinct
Color:
blue, blue green, light blue, or black blue.
Density:
3 - 3.1, Average = 3.05
Diaphaniety:
Subtranslucent to opaque
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., Pyramidal - Crystals are shaped like pyramids.,
Hardness:
5-6 - Between Apatite and Orthoclase
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
white
More details...