This course will help student to be better prepared and study in the right direction for JEE Main.. Dont't have an account? Register Now. Colleges B. Quick links BTech M. Computer Application and IT Change. Pharmacy Change. Hospitality and Tourism Change. Competition Change. School Change.
AL Class 6 to 10 Ask Doubt. Study Abroad Change. Management and Business Administration Change. Learn Change. Medicine and Allied Sciences Change. Law Change. Animation and Design Change. Quick Link BDes M. Media, Mass Communication and Journalism Change. Two Dimensions 1.
Three Dimensions 2. The fcc Structure 2. Conventional Unit Cell 2. Packing Density 2. Coordination Number 3. The hcp Structure. Close Packing of Spheres Two Dimensions One can easily see that the closest packing of spheres in two dimensions is realised by a hexagonal structure: Each sphere is in contact with six neighboured spheres.
Three Dimensions In three dimensions one can now go ahead and add another equivalent layer. How close-packed structures of spheres can be constructed: In a first layer the spheres are arranged in a hexagonal pattern, each sphere being surrounded by six others A. Then a second layer with the same structure is added. But this layer is slightly shifted and hence just filling the gaps of the first layer B. In a third step another equivalent layer is added filling the gaps just as before but now there are two opportunities: Either this layer lies exactly above the first one A or it is shifted with respect to both A and B and thus has its own position C.
If you want to watch this video, please use a recent browser! Packing Density When the lattice points are inflated gradually, at some point they start to touch each other along the diagonals of the faces of the cube.
0コメント