This monumental work replaces the first edition by the same authors which was published nearly 40 years ago. Because of the enormous increase in knowledge about the feldspars, the commonest and most complex of the silicate families, the text has grown from 178 pages in the first edition (which covered all the framework silicates) to 972 pages. There has been an improvement in the quality of the paper, typeface and the diagrams, and micrographs, mostly of good quality, are included for the first time. The references, of which there are around 4000, are up to date to the early months...

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