I have taken powder xrd of my samples and want to calculate plasma energy and other parameters. For that I need number of valence electrons (Z) for my samples. So please suggest the method or equations for that.
one simple way is to compare your XRD spectrum with data base ( the data base is in XRD software ) for finding oxidation state, by knowing oxidation state so you can find the Z
Identify your phases (chemical formula) from the diffractogram using ICDD data files.
Apply simple chemistry to find the valency as suggested by Ghalei
http://en.wikipedia.org/wiki/Oxidation_state
Depending on your material (which i assume is metallic?) the atomic/ionic radii determined from xrd can be used as an indication of the oxidation state. Here it is useful to have values from similar compounds, as the radii depend on many parameters (coordination number,..)
I am not sure if it is actually possible to do this in intermetallics unambiguously.especially from powder data!?!
Maybe you can give more Information on your sample. In general this improves the quality of answers you get
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