General Information:
Chemical Formula:KLiFe++Al(AlSi3)O10(F,OH)2
Composition:(Molecular Weight = 437.10 gm)Potassium 8.94 %
K Lithium 1.59 %
LiAluminum 12.35 %
AlIron 12.78 %
FeSilicon 19.28 %
SiHydrogen 0.12 %
H Oxygen 38.43 %
O Fluorine 6.52 %
F Empirical Formula: KLiFe2+Al2Si3O10F1.5(OH)0.5
Environment:Pneumatolytic mineral occurring in cassiterite and topaz-bearing pegmatites.
Locality:Erzgebirge of Saxony at Zinnwald (now Cinovec) - "Ore Mountains", Czechoslovakia.
Name Origin:Named after its locality.
Physical Properties: Cleavage:[001] Good
Color:light brown, silvery white, gray, yellowish white, or greenish white.
Density:2.9 - 3.1, Average = 3
Diaphaniety:Transparent
Habits:Pseudo Hexagonal - Crystals show a hexagonal outline., Micaceous - Platy texture with "flexible" plates., Platy - Sheet forms (e.g. micas).
Hardness:3.5-4 - Copper Penny-Flourite
Luminescence:None.
Luster:Vitreous - Pearly
Streak:white
More details...
