A review of the distribution of monazite and of the geologic controls affecting the amount of thorium in monazite.

This volume deals with sulphates, carbonates, phosphates and halides, incorporating recent advances in investigative techniques. Each mineral chapter has sections on structure, chemistry, optical and physical properties, distinguishing features and paragenesis. Chapters are headed with brief tabulations of mineral data and a sketch of optical orientation. Results are included from ocean floor experimentation and deep sea drilling.