| Gedrite | |
|---|---|
| General | |
| Category | Inosilicate |
| Chemical formula | (Mg;Fe2+)2[(Mg;Fe2+)3Al2](Si6Al2)O22(OH)2 |
| Identification | |
| Color | White, gray, brown, green |
| Crystal habit | bladed and prismatic crystals; fibrous and sheath like aggregates. |
| Crystal system | Orthorhombic; 2/m 2/m 2/m |
| Cleavage | 56 and 126° - good; {210} perfect |
| Fracture | Splintery |
| Mohs scale hardness | 5.5 - 6 |
| Luster | Vitreous to silky |
| Diaphaneity | Translucent, will transmit light on thin edges. |
| Specific gravity | 3.18 - 3.33 |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.671 nβ = 1.681 nγ = 1.690 |
| Birefringence | δ = 0.019 |
| Pleochroism | Weak to moderate |
| References | [1][2][3] |
Gedrita es un mineral del grupo de los anfíbioles ortorrómbicos, su fórmula es: (Mg;Fe2+)2[(Mg;Fe2+)3Al2](Si6Al2)O22(OH)2.
: Diccionario[]
English: :Gedrite
Referencias[]
- ↑ http://www.handbookofmineralogy.org/pdfs/gedrite.pdf Handbook of Mineralogy
- ↑ http://webmineral.com/data/Gedrite.shtml Webmineral
- ↑ http://www.mindat.org/min-1665.html Mindat
- ↑ La nomenclatura de los anfíboles. Francisco José Fabregat Guinchard. Revista mexicana de ciencias geológicas, ISSN 1026-8774, Vol. 4, Nº. 1, 1980 , pag. 84