[Wien] Problem with Zr2Ni7 NN.

Sanjeev K. Srivastava sanjeev at phy.iitkgp.ernet.in
Tue Oct 16 06:24:09 CEST 2012


Dear WIEN2k users

I am working out the monoclinic Zr2Ni7 structure:

##########################################################################################################
Zr2Ni7_1                                                    
CXZ LATTICE,NONEQUIV.ATOMS:  6                              
MODE OF CALC=RELA unit=ang 
 23.041440 23.836283 15.561901 90.000000 90.000000158.251797
ATOM   1: X=0.90180000 Y=0.78850000 Z=0.00000000
          MULT= 2          ISPLIT= 8
ATOM   1:X= 0.09820000 Y=0.21150000 Z=0.00000000
Zr1        NPT=  781  R0=0.00010000 RMT=    2.5000   Z: 40.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   2: X=0.11450000 Y=0.73050000 Z=0.00000000
          MULT= 2          ISPLIT= 8
ATOM   2:X= 0.88550000 Y=0.26950000 Z=0.00000000
Zr2        NPT=  781  R0=0.00050000 RMT=    2.5000   Z: 40.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   3: X=0.48990000 Y=0.74390000 Z=0.00000000
          MULT= 2          ISPLIT= 8
ATOM   3:X= 0.51010000 Y=0.25610000 Z=0.00000000
Ni1        NPT=  781  R0=0.00050000 RMT=    2.0000   Z: 28.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   4: X=0.86870000 Y=0.79250000 Z=0.33750000
          MULT= 4          ISPLIT= 8
ATOM   4:X= 0.13130000 Y=0.20750000 Z=0.33750000
ATOM   4:X= 0.13130000 Y=0.20750000 Z=0.66250000
ATOM   4:X= 0.86870000 Y=0.79250000 Z=0.66250000
Ni2        NPT=  781  R0=0.00050000 RMT=    2.0000   Z: 28.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   5: X=0.12340000 Y=0.70260000 Z=0.33210000
          MULT= 4          ISPLIT= 8
ATOM   5:X= 0.87660000 Y=0.29740000 Z=0.33210000
ATOM   5:X= 0.87660000 Y=0.29740000 Z=0.66790000
ATOM   5:X= 0.12340000 Y=0.70260000 Z=0.66790000
Ni3        NPT=  781  R0=0.00050000 RMT=    2.0000   Z: 28.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   6: X=0.74740000 Y=0.49670000 Z=0.25360000
          MULT= 4          ISPLIT= 8
ATOM   6:X= 0.25260000 Y=0.50330000 Z=0.25360000
ATOM   6:X= 0.25260000 Y=0.50330000 Z=0.74640000
ATOM   6:X= 0.74740000 Y=0.49670000 Z=0.74640000
Ni4        NPT=  781  R0=0.00050000 RMT=    2.0000   Z: 28.0
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
   4      NUMBER OF SYMMETRY OPERATIONS
 1 0 0 0.00000000
 0 1 0 0.00000000
 0 0 1 0.00000000
       1
-1 0 0 0.00000000
 0-1 0 0.00000000
 0 0 1 0.00000000
       2
-1 0 0 0.00000000
 0-1 0 0.00000000
 0 0-1 0.00000000
       3
 1 0 0 0.00000000
 0 1 0 0.00000000
 0 0-1 0.00000000
       4
######################################################################################################

Here, I have forcibly taken RMT for Ni atoms as 2 otherwise, if I ask it to do automatically, it takes something like 0.06, which is unrealistic and initialization fails. But with RMT = 2 for Ni atoms, I get the following error in NN:

-------------------------------------------------------------------------------------------------------------------

 please specify nn-bondlength factor: (usually=2)
 DSTMAX:   20.0000000000000     
 NAMED ATOM: Zr1       Z changed to IATNR+999 to determine equivalency
 NAMED ATOM: Zr2       Z changed to IATNR+999 to determine equivalency
 NAMED ATOM: Ni1       Z changed to IATNR+999 to determine equivalency
 NAMED ATOM: Ni2       Z changed to IATNR+999 to determine equivalency
 NAMED ATOM: Ni3       Z changed to IATNR+999 to determine equivalency
 NAMED ATOM: Ni4       Z changed to IATNR+999 to determine equivalency
 gamma not equal 90

    ATOM  1  Zr1        ATOM  5  Ni3       
 RMT(  1)=2.50000 AND RMT(  5)=2.00000
 SUMS TO 4.50000  LT.  NN-DIST= 5.20915

    ATOM  2  Zr2        ATOM  4  Ni2       
 RMT(  2)=2.50000 AND RMT(  4)=2.00000
 SUMS TO 4.50000  LT.  NN-DIST= 5.09491

    ATOM  3  Ni1        ATOM  6  Ni4       
 RMT(  3)=2.00000 AND RMT(  6)=2.00000
 SUMS TO 4.00000  LT.  NN-DIST= 4.41394

    ATOM  4  Ni2        ATOM  5  Ni3       
 RMT(  4)=2.00000 AND RMT(  5)=2.00000
 SUMS TO 4.00000  LT.  NN-DIST= 4.58306

    ATOM  5  Ni3        ATOM  4  Ni2       
 RMT(  5)=2.00000 AND RMT(  4)=2.00000
 SUMS TO 4.00000  LT.  NN-DIST= 4.58306

   ERROR !!!!!!!!!!!!!!!
 RMT(  6)=2.00000 AND RMT(  6)=2.00000
 SUMS TO 4.00000 GT NNN-DIST= 0.12901
NN ENDS
0.030u 0.019s 0:00.09 44.4%	0+0k 16+416io 0pf+0w

-------------------------------------------------------------------------------------------------------

Please see the lines following ERROR !!!!!!!!!!!!!!.

Please advise me on what could be wrong and what could be the solution.

Best regards

Sanjeev

-- 
Dr. Sanjeev Kumar Srivastava
Assistant Professor
Department of Physics
Indian Institute of Technology Kharagpur
Kharagpur 721302
India

Ph.:     0091-3222-283854 (Office)
         0091-3222-283855 (Residence)
Mobile:  0091-9735444091
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