3.1.4 IBRAV=3 ���S�����i�q

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