Komatiites erupted billions of years ago as pulsating streams of white-hot lava. Their unusual chemical compositions and exceptionally high formation temperatures produced highly fluid lava that crystallized as spectacular layered flows. Investigation of the extreme conditions in which komatiites formed provides important evidence about the thermal and chemical evolution of the planet, and the nature of the Precambrian mantle. This monograph, written by three experts with long experience in the field, presents a complete account of the characteristics of komatiites including their volcanic...

The first stage in the determination of a crystal structure is the measurement of the intensities of the Bragg reflexions. This book is concerned with counter-methods of measuring these intensities. The use of counter methods has spread rapidly in recent years with the development of quantum detectors and of automatically controlled diffractometers. The authors of this book were among the first workers to design and operate automatic X-ray and neutron diffractometers; they have visited laboratories throughout the world where such instruments have been installed. Originally published in 1966,...

A key reference for researchers and advanced students of petrology, Archaean geology and economic geology.