I know the tricks but our XRD is not working at the moment so I am unable to analyze my stuff. I asked if some one can help me with their XRD analyses.
Not much......may be five to six samples are enough to solve my purpose. Yes the feldspar contents are high. This is basically a nepheline syenite with pure Ab and Or with rare microcline as found in the thin section. I have EPMA data which shows pure nature of the feldspars. I am thankful for your concern in my work.