Thank you pieper for your answer I am studying the magnetic order of type III with Ni1,Ni2 up and Ni3, Ni4 down according the figure included.
This is the procedure that I adopted: -supercell 1x1x1 P to make the 4 atoms Ni indepedent a - I make the Ni1 and Ni2 to be the atom Ni1 and the atoms Ni3 and Ni4 to be the atom Ni2. - sgroup to search a new space group - I got the new strycture with monoclinic space group but with orthorhombic lattice parameters. I want to know if this new structure is true or not. The non magnetic structure is as follows: NiS-MnP P LATTICE,NONEQUIV.ATOMS: 2 62_Pnma MODE OF CALC=RELA unit=ang 10.056514 6.692230 10.722761 90.000000 90.000000 90.000000 ATOM -1: X=0.00500000 Y=0.25000000 Z=0.20000000 MULT= 4 ISPLIT= 8 -1: X=0.99500000 Y=0.75000000 Z=0.80000000 -1: X=0.50500000 Y=0.25000000 Z=0.30000000 -1: X=0.49500000 Y=0.75000000 Z=0.70000000 Ni NPT= 781 R0=0.00005000 RMT= 2.08 Z: 28.0 LOCAL ROT MATRIX: 0.0000000 1.0000000 0.0000000 0.0000000 0.0000000 1.0000000 1.0000000 0.0000000 0.0000000 ATOM -2: X=0.20000000 Y=0.25000000 Z=0.57000000 MULT= 4 ISPLIT= 8 -2: X=0.80000000 Y=0.75000000 Z=0.43000000 -2: X=0.70000000 Y=0.25000000 Z=0.93000000 -2: X=0.30000000 Y=0.75000000 Z=0.07000000 S NPT= 781 R0=0.00010000 RMT= 1.70 Z: 16.0 LOCAL ROT MATRIX: 0.0000000 1.0000000 0.0000000 0.0000000 0.0000000 1.0000000 1.0000000 0.0000000 0.0000000 8 NUMBER OF SYMMETRY OPERATIONS Best regards
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