10.2.1 The Structures of Metal Crystals Metal crystals are composed of atoms or/and ions via metal bonds.金属键没有方向性，金属晶体内原子以配 位数高为特征。 Arrangements of particles in metal crystals Packing Spheres of homo-radii The main three types(常见的有三种)： ●Hexagonal Close Packing(六方密堆积)； ●Face-Centered Cubic Close Packing(面心立密堆积)； ●Body-Centered Cubic Packing(体心立方堆积)Metal crystals are composed of atoms or/and ions via metal bonds. 金属键没有方向性，金属晶体内原子以配 位数高为特征。 10.2.1 The Structures of Metal Crystals The main three types(常见的有三种)： ⚫Hexagonal Close Packing(六方密堆积)； ⚫Face-Centered Cubic Close Packing(面心立密堆积); ⚫Body-Centered Cubic Packing(体心立方堆积) Packing Spheres of homo-radii Arrangements of particles in metal crystals