3.1.17 IBRAV=10 ���S�����i�q(I)

CELLDM(1) $=a$, CELLDM(2) $=b/a$, CELLDM(3) $=c/a$, $\Omega=abc/2$
$({\bf a}_{1},{\bf a}_{2},{\bf a}_{3})= ({\bf x},{\bf y},{\bf z}) \left( \beg... ...\frac{b}{2} \\ \frac{c}{2} & \frac{c}{2} & -\frac{c}{2} \end{array} \right)$
$({\bf b}_{1},{\bf b}_{2},{\bf b}_{3})= \frac{2 \pi}{a} ({\bf x},{\bf y},{\bf ... ...ray}{ccc} 0 & 1 & 1 \\ a/b & 0 & a/b \\ a/c & a/c& 0 \end{array} \right)$