In haxagonal closed packing it is also called as ABAB type ...so why when it is 2D ..the whole 1st layer is called as layer A
Dear Student,
Please find below the solution to the asked query.
The packing is named as ABAB or ABCA, etc. according to the arrangement of atoms or layers of atoms.
In 2D structure, the first layer has a particular arrangement of atoms while in the second layer, this arrangement is different. The third layer is again the same as the first layer, and so on.
Thus, it is named as ABAB.
Hexagonal close packing in two dimension occurs, when second row of atoms is placed in the depressions between the spheres of first row, as shown below:
As you can see, the first row and second rows are arranged in different ways. Thus, to represent this, we have named the whole first row as A and second as B.
Hope this information clears your doubt about this topic. In case of any other doubt, do ask here on the portal and our experts will try to help you out as soon as possible.
Regards
Akanksha Jain
Please find below the solution to the asked query.
The packing is named as ABAB or ABCA, etc. according to the arrangement of atoms or layers of atoms.
In 2D structure, the first layer has a particular arrangement of atoms while in the second layer, this arrangement is different. The third layer is again the same as the first layer, and so on.
Thus, it is named as ABAB.
Hexagonal close packing in two dimension occurs, when second row of atoms is placed in the depressions between the spheres of first row, as shown below:
As you can see, the first row and second rows are arranged in different ways. Thus, to represent this, we have named the whole first row as A and second as B.
Hope this information clears your doubt about this topic. In case of any other doubt, do ask here on the portal and our experts will try to help you out as soon as possible.
Regards
Akanksha Jain