Formula: FeAs2
Origin of name: Locality; Lölling, near Hüttenberg, Austria
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning: On {001}, may form trillings; on {101}, polysynthetic
Unit cell: a = 5.300 Å, = 5.983 Å, c = 2.882 Å
Colour: Silver-white to steel-gray
Diaphaneity:
Luster: Metallic
Habit: Crystals prismatic, sometimes pyramidal and doubly terminated
Hardness: 5 to 5.5
Specific gravity: 7.43
Cleavage: 2; {010} and {101} sometimes distinct
Tenacity: Uneven; brittle
Streak: Greyish black
Synonyms/varieties:
Comments: Series with safflorite
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