Re: CCL:magnetic shielding tensors

[Christoph van Wüllen <Christoph.vanWullen ( ( at ) ) tu-berlin.de>]

 Well, a shielding tensor is a mixed second derivative of the (electronic)
 energy with respect to a component (x,y,z) of the external magnetic field
 and a component (x,y,z) of a nuclear magnetic moment. I do not understand
 why you expect the tensor to be symmetric. It *can* be symmetric (e.g. if
 symmetry dictates that it is diagonal), but in general it is not, and is not
 expected to be.
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