General Information:
Chemical Formula:
MgAl(SO4)2F·14(H2O)
Composition:
(Molecular Weight = 514.63 gm)
Magnesium 4.72 % Mg
Aluminum 5.24 % Al
Hydrogen 5.48 % H
Sulfur 12.46 % S
Oxygen 68.40 % O
Fluorine 3.69 % F
Empirical Formula:
MgAl(SO4)2F·14(H2O)
Environment:
Associated with pyrite and fluorite and in fractures cutting pyroxene-amphibole fenites.
IMA Status:
Approved IMA
Locality:
Ilmeniskie Mountains, Ural Mountains, Russia.
Name Origin:
Named for Nikolai Vasilevich Svyazhin (1927-1967), Russian mineralogist.
Physical Properties:
Color:
colorless, gray white, or yellow.
Density:
1.69
Diaphaniety:
Transparent
Habits:
Tabular - Form dimensions are thin in one direction., Nodular - Tuberose forms having irregular protuberances over the surface.,
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous (Glassy)
Streak:
white
More details...