General Information:
Chemical Formula:
NaCu5O2(SeO3)2Cl
Composition:
(Molecular Weight = 662.09 gm)
Sodium 3.47 % Na
Copper 47.99 % Cu
Selenium 23.85 % Se
Chlorine 5.35 % Cl
Oxygen 19.33 % O
Empirical Formula:
NaCu5O2(SeO3)2Cl
Environment:
From fumarolic exhalations.
IMA Status:
Approved IMA 1996 (Dana # Added)
Locality:
On the South and North breaks of the Tolbachik Main Fracture eruption, Kamchatka, Russia.
Name Origin:
For G. A. Ilinskiy (1927-1996) of St. Petersburg University.
Physical Properties:
Cleavage:
[100] Perfect
Color:
emerald green.
Density:
4.08
Diaphaniety:
Transparent
Habits:
Tabular - Form dimensions are thin in one direction., Euhedral Crystals - Occurs as well-formed crystals showing good external form.,
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Adamantine
Streak:
light green
More details...