Crystals and Light: An Introduction to Optical Crystallography

2-fold axis acute angle Answers arrangement atoms axes bands biaxial bisectrix calcite called Chapter cleavage components consider course crossed polarized light crystal crystallographic cubic cubic crystals described determine discussed edge ellipsoid example extinction faces fact four give given hexagonal index of refraction indices interference colors interference figure known lattice length looking lower measure mica microscope mirror plane monoclinic normal object observed occur operation optic axis optic plane optically active ordinary ray orientation original orthorhombic parallel path piece placed plate point group polarization direction position possible projection properties quartz question refers reflected relative represent respectively result retardation rotation screw seen sheet shown in Fig shows side sight slow sodium structure substance symmetry elements Table tetragonal thickness tion Titanite uniaxial unit cell upper various vector surface vibration directions viewed wavelength