The quadruple coupling is a signed quantity. However, experiments (almost always) measure the magnitude. I'd prefer to colour code based on the magnitude.
At the moment magresview2 can colour code based on Vzz, asymmetry (eta) or Cq. But within the same species (i.e. same nuclear quadrupole moment) Vzz and Cq give the same. I think the old magresView used the modulus of Cq.
The quadruple coupling is a signed quantity. However, experiments (almost always) measure the magnitude. I'd prefer to colour code based on the magnitude.
At the moment magresview2 can colour code based on Vzz, asymmetry (eta) or Cq. But within the same species (i.e. same nuclear quadrupole moment) Vzz and Cq give the same. I think the old magresView used the modulus of Cq.