GEOL 102 Lecture Notes - Lecture 5: Thermal Conductivity, Surface Tension

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 102
• Professor: Ronald C Peterson

Document Summary

Hard, but has a plane of weakness (has cleavage) Using a laser, you can cut diamond. Comparing the two on a temperature pressure graph, diamond is above graphite. Diamonds will burn when heated (carbon compound), and it will disappear to carbon dioxide gas. Diamond has very high refractive index: light speed in a diamond is a third than in a vacuum: bends light dramatically. High dispersion: dispersion is the difference between red and blue light, disperses light into the colors of the rainbow dramatically. Hydrophobic: surface tension: diamond doesn"t want to bond the water so it causes it bead up. Use this property to get it to stick to grease. Properties & ways to grade it: 4 c"s: cut, clarity, color, carat. With a great big crystal, to get the optimum out of that diamond, you polish a window to see inside for any dents or other imperfections inside.