Formula: Cu9S8
Origin of name: from locality Yarrow Creek, southwestern Alberta, Canada
Crystal system: Trigonal
Crystal class: 3m
Twinning:
Unit cell: a = 3.8, c = 67.26
Colour: Black, blue, blue to bluish white in reflected light, tarnishes
Diaphaneity: Opaque
Luster: Metallic
Habit: Massive, stellate aggregates
Hardness: 2.5
Specific gravity: 4.89
Cleavage: [0001] distinct
Tenacity:
Streak:
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 |