I立方点腾(Cubis lantices)a-b-ea-B-y-90 可钢回 Ⅱ四方点(Tetragonal lattices) 川六方点4(Hexagona1 attice) a-b≠c0=8-90=120° 十四种布喇菲点阵 V菱方点阵(Rhombohedral lattices) M单斜点阵(Monoclinice) 1n三斜点情Triclinic lattices) a-b-e-p-yh90“ abe o9 B a≠b≠ca≠B≠y