الفهرس 
INTRODUCTION
Heavy atom techniqueOnly 14 pages are availabe for public view
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Abstract
The Crstal Structure anays is byMeans of X-ray Diffraction are Simiar in Principle, they Give Details of Exact Interatomic Distaces and Valency Angles as Wall as Valuble Information about Intermlecular and Intra -Morever the Latter Developents of X-ray Diffraction Methods Involing Fourier Synthesis of all the Observed X-raySpotra are Able to give the General Electron Density Distribution Wthin the Unit Cell of the Crystal.