2.Face-centered cubic close-packing:(fcc) Each third-layer sphere fits into a depression that is directly over a depression in the first layer.The pattern is repeated ABCABC... Coordination number(配位数)：12 Spatial occupancy factor(空间占有率)：74.05%
2. Face-centered cubic close-packing: (fcc) Coordination number(配位数)：12 Spatial occupancy factor (空间占有率): 74.05% Each third-layer sphere fits into a depression that is directly over a depression in the first layer. The pattern is repeated ABCABC… 1 2 3 5 4 6
A ABC ABC ABC... Coordination number(配位数)：12 Spatial occupancy factor(空间占有率)：74.05%
Coordination number(配位数)：12 Spatial occupancy factor (空间占有率): ABC ABC ABC… 74.05% 1 2 3 5 4 6 A B C A A B C
3.Body-centered cubic packing:(bec) Coordination number(配位数)：8 Spatial occupancy factor(空间占有率)：68.02%
3.Body-centered cubic packing: (bcc) 68.02% Coordination number(配位数)：8 Spatial occupancy factor (空间占有率):
Types of interstice between close-packed layer .Tetrahedral interstice: 一层的三个球与 上或下层密堆积 的球间的空隙。 lo
Types of interstice between close-packed layer •Tetrahedral interstice： 一层的三个球与 上或下层密堆积 的球间的空隙
.Octahedral interstice: 一层的三个球与 错位排列的另一 层三个球间的空 隙
•Octahedral interstice： 一层的三个球与 错位排列的另一 层三个球间的空 隙