Coquimbite
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Description
A yellowish brown to violet hydrated iron sulfate mineral. Coquimbite was named after the province of Coquimbo in Chile where it was first described in 1841.
Synonyms and Related Terms
coquimbit; coquimbita
Physical and Chemical Properties
- Crystal structure is massive or granular, but may occur in plates or prisms.
- Fracture = uneven
- Cleavage = imperfect
- Luster = vitreous
- Streak = white
| Composition | Fe2(SO4)3.9H2O |
|---|---|
| Mohs Hardness | 2.5 |
| Density | 2.0-2.1 g/ml |
| Molecular Weight | 562.02 |
| Refractive Index | 1.55; 1.557 |
Resources and Citations
- Web Minerals: Coquimbite
- Mindat at http://www.mindat.org/min-1126.html