<div>I am trying to optimize Fe2Ti system for more than a month. Still i am facing problem in it.</div> <div> </div> <div>Structure Details: Positions of atoms Fe (0,0,0) and (0.1705,0.341,1/4)</div> <div> Ti (1/3,2/3,0.5647)</div> <div> a=b=4.794 A c=7.834 A </div> <div> alpha=beta=90 degree gamma=120
degree</div> <div>Parameters: RMT (of Fe and Ti) =2 k point =76 IBZ Gmax=14 </div> <div> mixer=0.20 RKmax=10 </div> <div> </div> <div>Force are there in atom 2 and atom 3</div> <div> </div> <div>SCF and mini calculation runs nicely.</div> <div>During optimization with mini, varying volume from -5 to 0%, it shows error in</div> <div>-3% volume reduction. It shows mini.error (stop in mini forces small)</div> <div> </div> <div>Since i tried optimization without mini, it runs nicely from -5 to 0% volume reduction. But it shows error in c/a ratio optimization. Both mini.error (stop in mini forces small) and lapw1.error (Cholesky INFO = 2198 'SECLR4' - POTRF (scalarpack/lapack) failed).</div> <div> </div> <div>I know that i am doing mistake some where. Because of that i tried all the possiblities.
But i am not able to trace it out. Any suggestions regarding this problem will be helpful. </div> <div> </div> <div>Thanks in advance</div><BR><BR><DIV>Regards,</DIV> <DIV>Santhy Jaiker</DIV> <DIV> </DIV> <DIV>Research Scholar,</DIV> <DIV>Materials Thermodynamics Lab,</DIV> <DIV>Department of Metallurgical and Materials Engineering,</DIV> <DIV>Indian Institute of Technology Madras,</DIV> <DIV>Chennai - 600 036, India</DIV> <DIV>Tel: 91-044-22575763<BR style="COLOR: rgb(191,95,0)"><SPAN style="COLOR: rgb(185,185,185)">**********************************************</SPAN><BR style="COLOR: rgb(185,185,185)"><SPAN style="COLOR: rgb(185,185,185)">A truly happy person is one</SPAN><BR style="COLOR: rgb(185,185,185)"><SPAN style="COLOR: rgb(185,185,185)">who can enjoy the scenery on a detour</SPAN><BR style="COLOR: rgb(185,185,185)"><SPAN style="COLOR: rgb(185,185,185)">**********************************************</SPAN><BR></DIV><p> 
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