Biotite belongs to a silicate mineral family known as micas. Mica occurs in crystals of various colors,but its most interesting feature is perfect cleavage,the tendency to split along flat planes. The crystal structure of mica consists of sheets of atoms; the forces holding the atoms together within a sheet are strong,but those between the sheets are weak. Mica can be split into sheets that are transparent and microscopically thin. These sheets are flexible and in times past have even been used as window panes! The black iron-rich mica known as biotite is a component of many rocks throughout the world. Large fine biotite crystals occur in Canada and many other places | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Arem, Joel |
Bildgröße: | 3851 px × 2550 px |
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