This series of monographs represents continuation on an inter- nationai basis of the previous series MINERALOGIE UND PETRO- GRAPHIE IN EINZELDARSTELLUNGEN, published by Sprin- ger-Verlag. The voluminous results arising from recent progress in pure and applied research increase the need for authoritative reviews but the standard scientific journals are unable to provide the space for them. By their very nature, text-books are unable to consider specific...