Lacroixite

General Information:
 Chemical Formula:
NaAl(PO4)F
 Composition:
(Molecular Weight = 163.94 gm)
Sodium 14.02 % Na
Aluminum 16.46 % Al
Phosphorus 18.89 % P 
Oxygen 39.04 % O 
Fluorine 11.59 % F 
 Empirical Formula:
NaAl(PO4)F
Physical Properties:
 Cleavage:
[111] Indistinct, [111] Indistinct
 Color:
colorless, gray, gray white, light green, or light yellow.
 Density:
3.29
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous - Resinous
 Streak:
white
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