3.1.22 IBRAV=13 base-centered monoclinic(B)(底心単斜格子(B))

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