Formula: FeTiO3
Origin of name: After locality; Ilman Mountains, Russia
Crystal system: Hexagonal
Crystal class: -3
Twinning: On {0001}, Simple; on {10-11}, lamellar
Unit cell: a = 5.09 Ǻ, c = 14.09 Ǻ
Colour: Iron-black
Diaphaneity:
Luster: Metallic to dull
Habit: Crystals thick tabular or acute rhombohedral; granular; massive, lamellar to compact
Hardness: 5 to 6
Specific gravity: 4.72
Cleavage: 2; {0001} and {10-11} parting
Tenacity: Conchoidal to uneven; brittle
Streak: Black
Synonyms/varieties:
Comments: Series with geikielite and pyrophanite
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