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charles0116

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scprqt:  WARNING -
  nstep=  200 was not enough SCF cycles to converge;
  potential residual=  1.475E-05 exceeds tolvrs=  1.000E-10

nstepÉèΪ200¼º¾­²î²»¶àÁ˰ɣ¿ÔÙµ÷´óÒ²Ö»ÊÇÀË·Ñʱ¼ä£¿

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max grad (force/stress) = ¡Á¡Á¡Á¡Á¡Á > tolmxf= 5.0000E-05 ha/bohr (free atoms)
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Ϊ´Ë£¬ÎÒµ÷ÕûÁËoccopt=1 or 7 ;iscf=7 or 5; »¹µ÷ÕûÁ˸÷ÖÖÊÕÁ²²ÎÊý tolmxf; tolvrs or toldff or tolrff or tolfe ; diemac µÈÖµ£¬Ò²Ôø³¢ÊÔ¹ýÖ±½Ó½øÐм¸ºÎÓÅ»¯£¨optcell=/0 ionmov=2 or 3)µ«¶¼ÎÞ·¨ÔÚntimeÖ®ÄÚÊÕÁ²¡£

ÇëÎʸ÷λ¸ßÊÖÎÒÕâÊÇʲôÎÊÌâÄØ£¿Ó°Ïìmax grad (force/stress)ÖµµÄÒòËØÓÐÊ²Ã´ÄØ£¿

ÎÒµÄÈÏΪ²»¹ÜÊÇÄÚ²¿Ô­×Ó³ÚÔ¥»òÊǺóÀ´µÄ¼¸ºÎÓÅ»¯£¬¶¼Ó¦¸ÃÊÇÂú×ã×ÔÇ¢¼ÆËã,¼´ max grad (force/stress) < tolmxfµÄ¡£²»ÖªÎÒÕâÑùµÄÀí½â¶ÔÂð£¿

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#Structural optimisation
#************************************
   nshiftk   1
   shiftk    0 0 0
#*********************************
   ecut 26
   ecutsm 0.5
   ngkpt 3 3 4
   occopt 7
   tsmear 0.01
#*********************************                  
#Common input data
   chksymbreak 0   
   chkprim  0      
   brvltt -1      

#Definition of the unit cell
#**********************************
   acell 2*11.135000 4.376000  Angstroms
   angdeg 90  90  90
#Definition of the atoms
#*********************
   spgroup 82
   ntypat 5                        
   znucl 48 30 16 7 6
   natom 14                           
   natrd 5                           
   typat 1 2 3 4 5
   xred                              
0.000000 0.000000  0.000000
0.000000 0.500000  0.250000  
-0.124500 0.152800 -0.302900
-0.048000 0.359600  0.006400
-0.078300 0.273400 -0.117700

#Definition of the scf procedure
#******************************
   iscf    7
   nstep   300
   ixc     1
   toldfe  5.0d-6
   diemac  10.0     
#Structural relaxation
#************************************
   ionmov 2   
   optcell 0      
   tolmxf 5.0d-5   
   ntime 100
#************************************
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  • 2013-08-20 21:35:14, 250.75 K

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charles0116

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charles0116

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max grad (force/stress) = ¡Á¡Á¡Á¡Á¡Á < tolmxf= 5.0000E-03 ha/bohr (free atoms)
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