Aspidolite
| Aspidolite | |
|---|---|
| General | |
| Category | Phyllosilicate |
| Formula (repeating unit) | NaMg3AlSi3O10(OH)2 |
| Crystal system | Monoclinic |
| Crystal class | 2/m |
| Space group | C2/m |
| Unit cell | a = 5.291(8), b = 9.16(2), c = 10.12(2) Å |
| Identification | |
| Fracture | Micaceous |
| Optical properties | Biaxial (-) |
| References | [1] |
Aspidolite is a mica group phyllosilicate mineral which is the sodium analogue of the magnesium-rich mineral phlogopite. The ideal chemical formula for aspidolite is NaMg3AlSi3O10(OH)2.[1]
References
- ^ a b Banno, Y.; Miyawaki, R.; Kogure, T.; Matsubara, S.; Kamiya, T.; Yamada, S. (2005). "Aspidolite, the Na analogue of phlogopite, from Kasuga-mura, Gifu Prefecture, central Japan: description and structural data" (PDF). Mineralogical Magazine. 69 (6): 1047–1057. doi:10.1180/0026461056960307.
