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Grundriss der Kristallchemie by J. E. Hiller

International Union of Crystallography
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  • Biology
  • Chemistry
  • Earth Science
  • Ecology
  • Geography


Grundriss der Kristallchemie by J. E. Hiller 304 BOOK REVIEWS of the minor elements in magmatic crystallization. The very detailed studies of pegmatites made by Fersman is, ,however, not mentioned. The weathering cycle and sedimentation are next considered and the importance of ionic and redox potentials is indicated. The treatment of any individual point must inevitably be brief in a book such as this, and in the section on clay minerals the author does well to emphasize the difficulties in the study of this group. I t is true that examples of the various clay minerals are found locally in a reasonably pure state, but it appears that as far as normal weathering and sedimentation are concerned the occurrence of a mono- mineralic clay is the exception rather than the rule, and the range of possibility of interstratification of the various basic types seems to be endless. The picture of the environmental conditions required for the formation of the various clay minerals has proved too simple and the physical make-up of the weathering rock is of as much importance in determining the nature of the end-products as its chemical and mineralogical composition. A great deal of the earlier work on sediments needs revision, and reference in this section to Millot's important work on the relation of clay minerals in sediments to environment would hav~ been useful. The chapters on the hydrosphere and atmosphere, like that on sedimentation, follow broadly the outline given by Goldschrnidt in 1933-4, and later work has hardly altered the picture very much. The chapter on the biosphere has a useful discussion of the role of ionic potential in the bio-accumulation of elements and also of biogenic deposits. The discussion on metamorphism, which forms the penult imate chapter, consists in the main of an exposition of Eskola's facies principle and follows closely that given by Eskola in his own book; while examples of metasomatism are found in other chapters, a more com

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