Table of Contents I. Introduction 180 II. The Structure of Diamond 180 III. Formation of the Energy Bands 181 IV. The Brillouin Zone 182 V. Quantitative Calculations of the Energy Bands 183 VI. Investigation of the Band Structure by Optical Methods 187 VII. Fundamental Physical Properties 188 VIII. Semiconducting Diamonds 190 IX. Characteristic Properties of the Band Structure of a Real Diamond 191 X. Applications of Diamonds in the Electronics Industry and in Instrument Manufacture 193 References 194