Palermoite

General Information:
 Chemical Formula:
(Sr,Ca)(Li,Na)2Al4(PO4)4(OH)4
 Composition:
(Molecular Weight = 653.48 gm)
Sodium 1.76 % Na
Strontium 10.06 % Sr
Lithium 1.59 % Li
Calcium 1.53 % Ca
Aluminum 16.52 % Al
Phosphorus 18.96 % P 
Hydrogen 0.62 % H 
Oxygen 48.97 % O 
 Empirical Formula:
Sr0.75Ca0.25Li1.5Na0.5Al4(PO4)4(OH)4
Physical Properties:
 Cleavage:
[100] Perfect, [001] Distinct
 Color:
colorless or white.
 Density:
3.22
 Diaphaniety:
Transparent
 Hardness:
5.5 - Knife Blade
 Luster:
Vitreous - Adamantine
 Streak:
white
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