Formula: (Fe,Pb)4S8O4
Origin of name: for Prof. Willy A. Viaene (1943-), Katholieke Universiteit Leuven, Belgium.
Crystal system: Monoclinic
Crystal class: unknown
Twinning:
Unit cell: a = 9.717, b = 7.28, c = 6.559, β = 95°
Colour: Yellow
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystallites less than 30 micron forming polycrystalline aggregates up to 200 micron, spherical
Hardness: 3
Specific gravity: 3.7-3.9
Cleavage: {110} good
Tenacity:
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 |