Crystal chemistry of trace elements in natural and synthetic goethite

Summary of Recommendations of AIPEA Nomenclature Committee

Order–Disorder in Clay Mineral Structures

Because of their small particle sizes and v~riable degrees of crystal perfection, it is not surprisi4g that clay minerals proved extremely difficult to characterize adequately prior to the development of ~odem analytical techniques. Problems in charactetization led quite naturally to problems in nomenclatute, undoubtedly more so than for the macroscopic~ more crystalline minerals. The popular adoption ~ the early 1950s of the X-ray powder diffractometer for clay studies helped to solve some of the probl

Summary of recommendations of AIPEA Nomenclature Committee on clay minerals

In the words of Ross and Hendricks (1945), “Clay minerals . . . are the dominant materials of shales and surficial rocks and so are among the most important structural materials of the earth’s surface.” Clay minerals play a significant role in many aspects of life, ranging from their domination of the properties of the soils and sediments beneath us to their ubiquitous commercial use in many products and industries (Newman, 1984; Odom, 1984; Jepson, 1984, 1987). Iron in the crystal structures of these layer silicates significantly affects their physical and chemical properties, and thus is of great importance in the world around us.

G. W. Brindley

Papers

Compositions, structures, and properties of nickel-containing minerals in the kerolite-pimelite series