Thanks Stefano. However, personally, I am not yet clear about your explanation regarding the dynamical matrices. Please explain in clear terms what those zeros in second , fourth and sixth columns after the 'Dynamical Matrix in Cartesian axes' stand for. Also the zeros in similar columns after the "Diagonalizing the dynamical matrix. What do they correspond to?<br>
<br>Thank you very much.<br>-- <br>Raji Abdulrafiu Tunde,<br>Solid state and Material Physics Group,<br>Department of Physics,<br>University of Cape Town,<br>Private Bag X3,<br>Rondebosch 7701,<br>Cape Town. South Africa.<br>
Cell: +27722668228<br>Fax: +27216503342<br>