Agrellit is a mineral of the class of silicates .
| Agrellit | |
|---|---|
 | |
| Formula | NaCa 2 Si 4 O 10 F |
| Physical properties | |
| Colour | white, grayish or greenish white |
| Trait color | white |
| Shine | glass. silky. pearl |
| Transparency | transparent, translucent |
| Hardness | 5.5 |
| Cleavage | perfect |
| Kink | sly |
| Density | 2.902 g / cm³ |
| Syngonia | Triclinic |
Named after the English scientist Stuart Agrell .
Associated minerals: mozandrite , britolite , lignite , phlogopite , calcite , fluorite , clinogumite , norberite , zircon , biotite , galena . It is found in syenite pegmatites.