Formula: TlHgSb4S7
Origin of name: for David J. Vaughan (1946-), British mineralogist
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 9.012, b = 13.223, c = 5.906, α = 93.27°, β = 95.05°, γ = 109.16°
Colour: Black, greenish gray, bluish gray in reflected light
Diaphaneity: Opaque
Luster: Metallic
Habit: Anhedral grains, microscopic
Hardness: 3-3.5
Specific gravity:
Cleavage: Weak parting observed
Tenacity: Brittle, even, may be arcuate fracture
Streak: Black
Synonyms/varieties:
Comments:
| Back to Alphabetical list | Colour photos | Optical properties/Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |