General Information:
Chemical Formula:
FeS·Ca(OH)2·Al(OH)3
Composition:
(Molecular Weight = 240.01 gm)
Calcium 16.70 % Ca
Aluminum 11.24 % Al
Iron 23.27 % Fe
Hydrogen 2.10 % H
Sulfur 13.36 % S
Oxygen 33.33 % O
Empirical Formula:
Fe2+SCaAl(OH)5
Environment:
In a skarn.
IMA Status:
Approved IMA
Locality:
Talnakh, Norilsk, Russia.
Name Origin:
Named for Leonid N. Vyalsov (1939-), Russian mineralogist.
Physical Properties:
Color:
red.
Density:
1.96
Diaphaniety:
Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
Luster:
Sub Metallic
More details...