General Information:
Chemical Formula:
Na5(Y,Dy,Gd)TiSi6O18·6(H2O)
Environment:
In hyperagpaitic pegmatites. The titanium-dominent analogue of sazykinaite-(Y)
IMA Status:
Approved IMA 1995 (Dana # Added)
Locality:
Mont Alluaiv in the northwestern part of the Lovozero alkaline massif, Kila Peninsula, Russia.
Name Origin:
For Yu. A. Pyatenko (1928-), prominent Russian crystal chemist.
Physical Properties:
Cleavage:
[0112] Indistinct
Color:
colorless.
Density:
2.68
Diaphaniety:
Transparent to Translucent
Habits:
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals., ,
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
white
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