tetartohedral
/tɪˌtɑːrtəˈhiːdrəl/
adjective
- Describing a crystal that has only one-fourth of the faces required for full symmetry.
- The mineral sample showed a tetartohedral form, which is unusual for that crystal family.
- Geology students learn about tetartohedral crystals when studying advanced crystallography.
- Under the microscope, the tetartohedral structure was clearly visible in the quartz specimen.