| Abstract: | The ultra-micro-hardness of non metallic crystals has been measured for 16 substances. These are products usually produced in mass-crystallization; inorganic, organic, with hydrates and unhydrates. The hardness-force-dependency was examined and data are compared to literature. KNO3 crystals showed a strong direction dependency (a factor of 2). In the end there has been made a first attempt to introduce a correlation of the measured micro-hardness and physical properties of the crystals, but so far this was only possible for face centred cubic lattices. |
