金属晶体最常见的有四种
立方最密堆积ccp(立方面心堆积) A1 (如金, 铜, 铝)
六方最密堆积hcp A3 (如Mg, Zn)
立方体心堆积 bcp A2 钠
金刚石型堆积 A4
它们各自的特点如下:
立方最密堆积ccp堆积系数74.05% 具有超强的延展性
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/ac345982b2b7d0a2e97cb5a8ccef76094b369a4a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
六方最密堆积(hcp, A3), 晶胞为六方简单(hP) 堆积系数74.05%
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/3b87e950352ac65cc55cd746fcf2b21193138aae?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
立方体心堆积(bcp,A2) 晶胞为体心立方(cI) 堆积系数68.02%
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/00e93901213fb80e8861d0e231d12f2eb9389457?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
金刚石型堆积 A4 晶胞为面心立方(cF) 堆积系数34.01% 通常为共价型晶体(原子晶体)
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0b46f21fbe096b634d5aef650b338744ebf8ac40?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)