3.1.20 IBRAV=12 simple monoclinic lattice(単純単斜格子)

CELLDM(1) $=a$, CELLDM(2) $=b/a$, CELLDM(3) $=c/a$,
CELLDM(4) $=\cos{\gamma} (0 < \gamma < 180^{\circ})$, $\Omega=abc\sin{\gamma}$
$({\bf a}_{1},{\bf a}_{2},{\bf a}_{3})= ({\bf x},{\bf y},{\bf z}) \left( \beg... ...cos{\gamma} & 0 \\ 0 & b\sin{\gamma} & 0 \\ 0 & 0 & c \end{array} \right)$
$({\bf b}_{1},{\bf b}_{2},{\bf b}_{3})= \frac{2 \pi}{a} ({\bf x},{\bf y},{\bf ... ...}} & \frac{a}{b\sin{\gamma}} & 0 \\ 0 & 0 & \frac{a}{c} \end{array} \right)$