The present voLume is the first in a series of suppLement voLumes to the beryLlium voLume which appeared in 1930. This voLume" BeryLLium" SuppLement VoLume A 1 is divided into the following chapters: 1. The Production of Beryllium 2. Uses 3. Nuclides 4. Atoms and Ions 5. MoLecuLes 6. ChemicaL Reactions H 7. The ChemicaL Behavior of Be in SoLution 8. ToxicoLogy of Beryllium Chapter 1 describes the steps from ore dressing to obtaining the metaL and then further refining and preparing speciaL forms. No differentiation is made between processes per formed on an industriaL scaLe and a Laboratory...

Astatine is - besides radon and francium - the only natural radioelement which only has short-Lived isotopes, thereby excluding experiments with . . weighable" amounts of the element. This implies that all available data on physics and chemistry of this element are 12 16 based on experiments on the tracer scale with 10- to 10- g - and this will also not change in future because no longer-Lived isotopes as yet known are to be expected. Due to the fact that the only isotope of At occurring in the natural decay series, 219At, results from the 0. 005% a-branching of 223Fr which itself is produced...