Vlodavetsite

General Information:
 Chemical Formula:
AlCa2(SO4)2F2Cl·4(H2O)
 Composition:
(Molecular Weight = 444.78 gm)
Calcium 18.02 % Ca
Aluminum 6.07 % Al
Hydrogen 1.81 % H 
Sulfur 14.42 % S 
Chlorine 7.97 % Cl
Oxygen 43.17 % O 
Fluorine 8.54 % F 
 Empirical Formula:
AlCa2(SO4)2F2Cl·4(H2O)
 Environment:
A product of fumarolic exhalations at temperatures below 100 deg. C.
 IMA Status:
Approved IMA
 Locality:
The Tolbachik Main Fracture eruption (Cone II of the Northern fissure), Kanchatka, Russia.
 Name Origin:
For V. I. Vlodavets (1893-1993), Russian volcanologist.
Physical Properties:
 Cleavage:
[100] Perfect
 Color:
colorless or yellow white.
 Density:
2.35
 Diaphaniety:
Transparent
 Habits:
Tabular - Form dimensions are thin in one direction., Platy - Sheet forms (e.g. micas).,
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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