General Information:
Chemical Formula:
Na(Ca,Mn++)Al(PO4)(F,OH)3
Composition:
(Molecular Weight = 241.11 gm)
Sodium 9.53 % Na
Calcium 14.96 % Ca
Manganese 2.28 % Mn
Aluminum 11.19 % Al
Phosphorus 12.85 % P
Hydrogen 0.50 % H
Oxygen 34.51 % O
Fluorine 14.18 % F
Empirical Formula:
NaCa0.9Mn2+0.1Al(PO4)F1.8(OH)1.2
Environment:
In cavities of a silicocarbonate sill found as inclusions in esosphorite.
IMA Status:
Approved IMA 1981
Locality:
Viitaniemi granite pegmatite, Erajarvi, Orivesi, Finland.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[101] Distinct
Color:
colorless, gray, gray white, or white.
Density:
3.06 - 3.245, Average = 3.15
Habits:
Inclusions - Generally found as inclusions in other minerals., ,
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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