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huterx

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[求助] FD-3M结构计算的弹性模量是否正确

用vasp直接计算方法得到的
TOTAL ELASTIC MODULI (kBar)
Direction    XX          YY          ZZ          XY          YZ          ZX
--------------------------------------------------------------------------------
XX         981.7718    603.6518    519.2990      0.0000    119.2929      0.0000
YY         603.6518    981.7718    519.2990      0.0000   -119.2929      0.0000
ZZ         519.2990    519.2990   1066.1246      0.0000      0.0000      0.0000
XY           0.0000      0.0000      0.0000    189.0600      0.0000    119.2929
YZ         119.2929   -119.2929      0.0000      0.0000    104.7072      0.0000
ZX           0.0000      0.0000      0.0000    119.2929      0.0000    104.7072
--------------------------------------------------------------------------------

POSCAR

SCAR-Fd-3m                              
   1.00000000000000     
     7.7310130606863057    0.0000000000000000    0.0000000000000000
     3.8655065303431528    6.6952537075759784   -0.0000000000041446
     3.8655065303431528    2.2317512358214158    6.3123457312399109
   Ag   In   S
     4     4     8
Direct
  0.1250000000000000  0.6250000000000000  0.1250000000000000
  0.6250000000000000  0.1250000000000000  0.1250000000000000
  0.1250000000000000  0.1250000000000000  0.1250000000000000
  0.1250000000000000  0.1250000000000000  0.6250000000000000
  0.6250000000000000  0.1250000000000000  0.6250000000000000
  0.1250000000000000  0.6250000000000000  0.6250000000000000
  0.6250000000000000  0.6250000000000000  0.6250000000000000
  0.6250000000000000  0.6250000000000000  0.1250000000000000
  0.8708572569390016  0.3874282881829968  0.8708572569390016
  0.3874282881829968  0.8708572569390016  0.8708571969389967
  0.8708572569390016  0.8708571969389967  0.8708572569390016
  0.8708571969389967  0.8708572569390016  0.3874282881829968
  0.3791427430609985  0.8625717118170033  0.3791428030610035
  0.8625717118170033  0.3791427430609985  0.3791427430609985
  0.3791427430609985  0.3791428030610035  0.8625717118170033
  0.3791428030610035  0.3791427430609985  0.3791427430609985

INCAR

PREC = Accurate
ENCUT = 500.0
EDIFF = 1e-6
ISMEAR = 0
SIGMA = 0.05
POTIM = 0.100
LCHARG = FALSE
LWAVE = FALSE
IBRION=6
ISIF=3
NFREE=4
EDIFFG = 1e-5
EDIFFG = -0.001
#NPAR = 4
KSPACING = 0.2
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