General Information:
Chemical Formula:
CaMgSc(PO4)2(OH)·4(H2O)
Composition:
(Molecular Weight = 388.35 gm)
Calcium 10.32 % Ca
Magnesium 6.26 % Mg
Scandium 11.58 % Sc
Phosphorus 15.95 % P
Hydrogen 2.34 % H
Oxygen 53.56 % O
Empirical Formula:
CaMgSc(PO4)2(OH)·4(H2O)
Environment:
Metasomatically reworked calcite-phlogopite-clinohumite-magnetite ores in a calcite-dolomite carbonatitic stockwork zone. The scandium dominant analog of overite and segelerite.
IMA Status:
Approved IMA (Dana # Added)
Locality:
Kovdor ultramafic alkaline complex, Yona or Juonni River (from the Russian or Finnish), Kola Peninsula, Russia).
Name Origin:
The name alludes to the locality. Pronounced YO'NAITE.
Physical Properties:
Cleavage:
None
Color:
colorless, light yellow, yellowish brown, gray, or bright orange.
Density:
2.43
Diaphaniety:
Translucent
Habits:
Spherical - Spherical, rounded aggregates., Platy - Sheet forms (e.g. micas).,
Hardness:
4-4.5 - Between Fluorite and Apatite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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