摘要
As we know, chemical shift of XPS has been used for the identification of the atoms of a given element with non-equivalent lattice sites in a compound. Reports on the use of XPS for single crystal study have been very scanty and that on the use of technique for the identification of allotropic single crystal has been nil so far.Allotropie single crystal is formed by thedifferent arrangements of the atoms in the cryatal which exhibit different X-ray diffraction data. By using these diffraction data, the fine valeuce-
