Because Kainosite is orthorhombic , the vibration directions XYZ coincide with the a , b , c crystallography axes .
Kainosite is a biaxial mineral , so the light entering its crystals will be polarized in two vibration directions ( XYZ ) for it has two optic axes .
Because mineral is orthorhombic , the vibration directions XYZ coincide with the a , b , c crystallography axes .
Kainosite is a biaxial mineral , so the light entering its crystals will be polarized in two vibration directions ( XYZ ) for it has two optic axes .