Fe4N and PAS

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    Jonas Hillen
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    I take a othogonal XYZ axes system, with Z pointing in the direction of the arrow
    1) Fe-I:
    X-axis is a 4-fold symmetry axis;
    Y-axis is a 4-fold symmetry axis;
    Z-axis is a 4-fold symmetry axis;
    So: this means theorem 2 is fulfilled and the EFG tensor is zero. This means also that all these axis could be Z-axis of the PAS and etha = 0

    2)Fe-IIb:
    X-axis is a 4-fold symmetry axis;
    Y-axis is a 4-fold symmetry axis;
    Z-axis is a 4-fold symmetry axis;
    So: the X-and Y-axis and Z-axis can be used as a Z-axis of the PAS system with etha being 0.

    3)Fe-IIa:
    idem for Fe-IIb

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