1.1.4. Lattice orientation

Orientation convention

	Figure 1: $z$, $x^\prime$, $z^{\prime\prime}$ (Bunge) rotation

Lattice orientation is given in Bunge (1982) Euler angles $\varphi_1$, $\phi$, and $\varphi_2$. They follow the rotation convention $z$, $x^\prime$, $z^{\prime\prime}$.

	Figure 2: Cubic unit cell in laboratory coordinate system $x$, $y$, $z$ rotated by $\varphi_1$ around $x$ (blue system in Fig. 1), additionally rotated by $\phi$ around $x^\prime$ (green system in Fig. 1), and finally rotated by $\varphi_2$ around $z^{\prime\prime}$ (yellow system in Fig. 1).