General Information:
Chemical Formula:FeAs2
Composition:(Molecular Weight = 205.69 gm)Iron 27.15 %
FeArsenic 72.85 %
As Empirical Formula: Fe2+As2
Name Origin:Named after its locality Lolling, Austria.
Physical Properties: Cleavage:[001] Distinct
Color:silvery white or tarnish gray.
Density:7.1 - 7.7, Average = 7.4
Diaphaniety:Opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Twinning Common - Crystals are usu ally twinned.
Hardness:5 - Apatite
Luminescence:Non-fluorescent.
Luster:Metallic
Streak:grayish black
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