Formula: PbSnS2
Origin of name: for Ted A. Hadley (1961-) of Sunnyvale, California, U.S.A., who participated in the collection of the holotype specimen.
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 7.014, b = 11.855, c = 12.601, α = 115.56°, β = 82.57°, γ = 100.57°
Colour: Very dark red to black
Diaphaneity: Opaque to translucent on thin edges
Luster: Adamantine to submetallic
Habit: Microscopic crystals, anhedral, spherical aggregates
Hardness: 2.5
Specific gravity:
Cleavage: 1; {010} poor
Tenacity: Brittle, uneven fracture
Streak: Red
Synonyms/varieties:
Comments:
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