Be Beryllium: The Element. Physical Properties (continued) and Electrochemical Behavior: B-e / A / 3 (Gmelin Handbook of Inorganic and Organometallic Chemistry - 8th edition) - Tapa blanda

The present Supplement Volume Beryllium A 3 continues and completes the description of the physical properties of the element, begun in Supplement Volume A 2, 1991, and also treats the electrochemical behavior of the metal. The unique combination of the Be properties, which was pointed out in Supplement Volume A 2, is also demonstrated in the following chapters of this Volume A 3: 13. Electrical Properties 14. Electronic Properties 15. Optical Properties. Emission and Impact Phenomena 16. Electrochemical Behavior Starting with the electrical properties, Be isarather good electrical conductor in centrast to what might be expected. Superconductivity was studied, especially on films. Quantum effects, which are more pronounced in Be than in most other metals, are the reason for numerous in­ vestigations of the magnetoresistance and the magnetic-breakdown effect. The basis for many of the characteristic properties is the unique nature of bonding in Be as a consequence of its peculiar electronic structure and the special shape of its Fermi surface which also gave rise to further numerous studies. Detailed cluster calculations were per­ formed to better understand the bonding in the metal. Regarding the optical properties, the high reflectivity of Be, particularly in the infrared region, makes it attractive for the fabrication of precision optical surfaces (mirrors); it is also useful for solar-collector surfaces in spacecraft applications. Emission and electron-and ion­ impact phenomena as well as neutron optics are also discussed.

The volume continues and completes the description of the physical properties of the beryllium metal (electrical, electronic, optical properties and, in addition, emission and impact phenomena). Moreover its electrochemical behavior is described in detail. The unique combination of properties pointed out in the previous Volume A 2, 1991, is continued in the properties described in this Volume A 3. Many of the characteristic properties are determined by the peculiar Be electronic structure and by the special shape of its Fermi surface. Numerous investigations are concerned with these topics and with the better understanding of bonding in the metal by cluster calculations. Optical properties are studied with respect to useful applications, e.g., as precision optical surfaces of Be (in spacecraft technology). Finally the description of the electrochemical behavior contains the fundamental processes for production of pure Be and metal refining.