3.1.23 IBRAV=113 base-centered monoclinic(C)(底心単斜格子(C))

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