Relationship among structure factors due to identical molecules in different crystallographic environments

The authors would like to express their sincere gratitude to Professor T .Okamoto for suggesting the problem, and for much helpful discussion and encouragement throughout the work. They also wish to express their thanks to Professors M.Tsuboi and M. Natsume for their valuable discussion. Heartiest thanks are also due to the H6ansha for their financial aid and to the Mitsubishi Chemical Industries for use of an IBM 7090 computer.