Hi,
I think the difference between the lattice
parameter of single crystal and powder is
coming from the misoriented surface of the
crystal.
To detect this rotate the crystal in its own plane
360 degrees with a convenable step and plot the
lattice parameter "a" versus the number of steps,
you'l
I recently encountered this with Y2O3. The literature results from single
crystal measurements show a lattice parameter of 10.604 Å while powder
diffraction results show 10.607 Å. I am using Y2O3 to calibrate the
twotheta response of my cps-120.
Originally I thought I should use 10.604 Å to cal
