Neighborite

General Information:
 Chemical Formula:
NaMgF3
 Composition:
(Molecular Weight = 104.29 gm)
Sodium 22.04 % Na
Magnesium 23.31 % Mg
Fluorine 54.65 % F 
 Empirical Formula:
NaMgF3
 IMA Status:
Approved IMA 1961
Physical Properties:
 Cleavage:
[???] Indistinct
 Color:
colorless, pink, or reddish brown.
 Density:
3.03
 Diaphaniety:
Transparent to Translucent
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Vitreous (Glassy)
 Streak:
white
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