wulfric.Atom.spin_angles

property

property Atom.spin_angles: tuple

Polar \(\theta\) and azimuthal \(\varphi\) angles of the spin vector:

Added in version 0.2.0.

\[\begin{split}\boldsymbol{S} = S \begin{pmatrix} \cos\varphi\sin\theta \\ \sin\varphi\sin\theta \\ \cos\theta \end{pmatrix}\end{split}\]

Returns:

theta, phituple of float

\(0^{\circ} \le \theta \le 180^{\circ}\) and \(0^{\circ} \le \varphi \le 360^{\circ}\).