Formula: FeNb3S6
Origin of name: Named after Alan D. Edgar (1935-1998), Professor of Petrology, University of Western Ontario, London, Ontario, Canada, in recognition of his contributions to the study of alkaline r ocks and synthetic equivalents.
Crystal system: Hexagonal
Crystal class: 622
Twinning:
Unit cell: a = 5.771, c = 12.19
Colour: Dark gray, black
Diaphaneity: Opaque
Luster: Metallic
Habit: Platy
Hardness: 2-2.5
Specific gravity:
Cleavage: [0001] perfect
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 |