[Wien] Trigonal LAO StructGen problem

Luigi Maduro - TNW L.A.Maduro at tudelft.nl
Tue Mar 1 17:21:00 CET 2022


Hi everyone,

I'm trying to create a unit cell of LaAlO3 in the R3-c space group (167) using the parameters found in the materials research project
https://materialsproject.org/materials/mp-2920/
However, filling in the lattice parameters, angles, and relative atomic coordinates found in the above resource gives me an error of
"cell parameters are not consistent with space group" and I cannot go further with the calculations.
I saved the structure anyway, and the case.struct file has the following structure


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


Title
R   LATTICE,NONEQUIV.ATOMS: 10 167_R-3c
MODE OF CALC=RELA unit=ang
 10.191297 10.191297 10.191297 60.223000 60.223000 60.223000
ATOM  -1: X=0.22222222 Y=0.52777778 Z=0.61111111
          MULT= 1          ISPLIT= 8
La         NPT=  781  R0=0.00001000 RMT=    2.0000   Z: 57.000
LOCAL ROT MATRIX:    1.0000000 0.0000000 0.0000000
                     0.0000000 1.0000000 0.0000000
                     0.0000000 0.0000000 1.0000000
ATOM   2: X=0.00000000 Y=0.25000000 Z=0.50000000
          MULT= 1          ISPLIT= 8
La         NPT=  781  R0=0.00001000 RMT=    2.0000   Z: 57.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   3: X=0.00000000 Y=0.00000000 Z=0.00000000
          MULT= 1          ISPLIT= 8
Al         NPT=  781  R0=0.00010000 RMT=    2.0000   Z: 13.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   4: X=0.11111111 Y=0.38888889 Z=0.55555556
          MULT= 1          ISPLIT= 8
Al         NPT=  781  R0=0.00010000 RMT=    2.0000   Z: 13.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   5: X=0.93463704 Y=0.64869629 Z=0.30065185
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   6: X=0.35620741 Y=0.06045926 Z=0.61437037
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   7: X=0.19934814 Y=0.38398519 Z=0.70260741
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   8: X=0.80065186 Y=0.61601481 Z=0.29739259
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM   9: X=0.64379259 Y=0.93954074 Z=0.38562963
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
ATOM  10: X=0.06536296 Y=0.35130371 Z=0.69934815
          MULT= 1          ISPLIT= 8
O          NPT=  781  R0=0.00010000 RMT=    2.0000   Z:  8.000
LOCAL ROT MATRIX:    0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
                     0.0000000 0.0000000 0.0000000
   0      NUMBER OF SYMMETRY OPERATIONS


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

I am not sure as how to continue. I have a feeling something is wrong with the lattice vector angles that I tried to use (60.223 for all three angles).
Any help will be highly appreciated!


Kind regards,
Luigi Maduro
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