Dear All,<br>I have a quick question regarding the polarization vector in FEFF calculation.<br>There is a card of &quot;POLARIZATION x y z&quot; that we can use to count in polarization effect in FEFF calculation. I just want to make sure that the x, y, z coordinates of the polarization vector is in the crystal Cartesian base. For example, if the direction of the electric field of the incident beam is along the a axis of the crystal, then I can use the card &quot;POLARIZATION 1 0 0&quot; in the FEFF input file to do the calculation. Is this correct? <br>

<br>Thank you very much!<br>Best<br>Yun<br>