16.56: Prehnita
- Page ID
- 90471
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| Prehnita | ||
|---|---|---|
| Composición química | Ca 2 Al 2 Si 3 O 10 (OH) 2 +Fe | |
| Sistema de cristal | Ortorrómbico | |
| Hábito | Generalmente agregado fibroso | |
| Escote | Buena dirección: 1 | |
| Fractura | Uneven-Concoidal | |
| Dureza | 6-6.5 | |
| Naturaleza óptica | Agregado biaxial (+) | |
| Índice de refracción | 1.649-1.616 | |
| Birrefringencia | .020-0.031 | |
| Gravedad específica | 2.90 | |
| Lustre | Vítreo-nacarado | |
Figura\(\PageIndex{1}\): Cabujón Prehnite
Foto cortesía de Barbra Voltaire
Figura\(\PageIndex{2}\): Cristales de Prehnita
Foto cortesía de Barbra Voltaire