Edingtonite
| Edingtonite | |
|---|---|
|
Edingtonite from Ice River Alkaline Complex, Golden Mining Division, British Columbia, Canada | |
| General | |
| Category | Tectosilicate |
| Formula (repeating unit) | BaAl2Si3O10·4H2O |
| Strunz classification | 09.GA.15 |
| Identification | |
| Crystal system | Orthorhombic, some are tetragonal |
| Mohs scale hardness | 4 - 5 |
| Optical properties | Biaxial (-) |
| Refractive index | nα = 1.538 nβ = 1.549 nγ = 1.554 |
| Birefringence | δ = 0.016 |
| 2V angle | Calculated: 66° |
| References | [1][2] |
Edingtonite is a white, gray, brown, colorless, pink or yellow zeolite mineral. Its chemical formula is BaAl2Si3O10·4H2O. It has varieties with tetragonal, orthorhombic or triclinic crystals.[3]
It was named for Scottish mineral collector James Edington (1787–1844).[2]
References
- ↑ Edingtonite mineral data from Webmineral
- ↑ 2.0 2.1 Edingtonite mineral data from Mindat.org
- ↑ Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig: "Dana's new mineralogy", pp. 1683-1684. John Wiley & Sons, 1997
External links
Media related to Edingtonite at Wikimedia Commons