Hibbingite
| Hibbingite | |
|---|---|
| General | |
| Category | Halide mineral |
| Formula | Fe2(OH)3Cl |
| Strunz classification | 3.DA.10a
3 : HALIDES D : Oxyhalides, hydroxyhalides and related double halides A : With Cu, etc., without Pb |
| Crystal system | Orthorhombic |
| Crystal class | mmm (2/m 2/m 2/m) - Dipyramidal |
| Space group | Pnam |
| Unit cell | a=6.31(6), b=9.20( 4 ) ,c=7.10(7)L, v:412.17A', and Z=4 |
| Identification | |
| Formula mass | 198.17 |
| Color | colorless to pale green, increasingly red with oxidation |
| Crystal habit | platy |
| Cleavage | perpendicular to vein walls |
| Specific gravity | 3.04 |
| Density | 3.04 g/cm³ |
| Refractive index | 1.6-1.7 |
| Solubility | soluble in water and ethanol |
| References | |
Hibbingite is a divalent iron hydroxychloride found in the Duluth Complex of northeastern Minnesota, United States. Hibbingite can be found in troctolitic, partially serpentinized rocks. Hibbingite can also be found in sulfide ore from the Sudbury Complex, Canada, the Noril’sk Intrusion in Russia, and in terrestrially weathered meteorites. Hibbingite is mostly found as vein filings from drill cores taken from troctolitic, partially serpentinized rocks. Hibbingite itself can have cleavage perpendicular to the vein walls in which it is found. Hibbingite is associated with serpentine, olivine, plagioclase, biotite, and secondary magnetite or goethite. Fresh samples are internally green but turn reddish as they oxidize. Hibbingite is part of the atacamite family of minerals.