Mineralpedia Details for Francisite
Francisite
Named after Glyn Francis, a Quality Control Officer at the Iron Monarch quarry in Australia and the collector of the first material. Francisite is a rare mineral that occurs in oxidizes baryte lenses in sedimentary iron formations. It occurs in only two localities in the world: at its type locality in the Iron Monarch open cut in South Australia, and at the Baccu Locci mine in Sardinia, Italy.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/francisite.pdf
- Formula
- Cu3Bi(Se4+O3)2O2Cl
- Crystal System
- Orthorhombic
- Cleavage
- None, None, None
- Luster
- Adamantine
- Color
- light green
- Streak
- light green
- Class
- Orthorhombic - Dipyramidal
- Hardness
- 3-4
- WebMineral
- View Francisite
- Mindat
- View Francisite
Francisite from Iron Monarch mine, Iron Knob, South Australia, Australia
- Special Info
- Type Locality
Bright green (noncrystalline masses) to deep green (platy) and submetallic crystals to less than 0.1mm in white matrix.
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