Dear all,

I'm calculating the possible magnetic orderings using BasIreps (Fullprof). In particular I'm analyzing the possible orderings with k=(0,0,0.5). What concerns me is that when I select/deselect the "Full Physically Irreps" option the calculated magnetic structures are different.

For example, these are the Fullprof lines when "Full Physically Irreps" is not selected:

C -1                           <--Space group symbol for hkl generation
! Nsym   Cen  Laue Ireps N_Bas
     2     1     1    -1     4
! Real(0)-Imaginary(1) indicator for Ci
  0  0  0  0
SYMM x,y,z
BASR   0  1  0   0  0  1   0  1  0   0  0 -1
BASI   0  0  0   0  0  0   0  0  0   0  0  0
SYMM -x,-y,z+1/2
BASR   0  0  0   0  0  0   0  0  0   0  0  0
BASI   0  1  0   0  0 -1   0 -1  0   0  0 -1

and this is the result when "Full Physically Irreps" is selected:

C -1                           <--Space group symbol for hkl generation
! Nsym   Cen  Laue Ireps N_Bas
     2     1     1    -1     4
! Real(0)-Imaginary(1) indicator for Ci
  0  0  0  0
SYMM x,y,z
BASR   0  1  0   0  0  0   0  0  0   0  0  1
BASI   0  0  0   0  0  0   0  0  0   0  0  0
SYMM x,-y,-z
BASR   0  0  0   0  0  1   0  1  0   0  0  0
BASI   0  0  0   0  0  0   0  0  0   0  0  0


Conversely results are the same when k=(0,0,0).
I cannot find information about how this option works and I'm wondering what is the correct result. Does anybody have an idea about this?

Thanks in advance,
Alberto
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