Monoclinic Crystal Class Physical Properties of Ore Minerals Table 4. If you want to print this table please use landscape mode. Most common gold telluride. 105 to 130 diamagnetic very weak pleochroism, weakly to distinctly anisotropic, very weak bireflectance.
Optical properties vary greatly with composition.
Measurable surface charges on crystal faces at 25C. Pseudo-orthorhombic. 30.3 to 39.5 Crystal system is controversial. No elements are presently known to form ferroelectric crystals.