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swapneel5
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what is basic principle followed by atoms to arrange in basic structure?
The arrangement of atoms in a crystal lattice is determined by the size and shape of the atoms, as well as the strength of the atomic bonds. For some elements, the most energetically favorable arrangement is FCC, while for others it is HCP. Factors such as atomic radius, electronic structure, and interatomic forces all play a role in determining the preferred crystal structure for each element.
There is no clear pattern or trend in the elements that have FCC versus HCP structure. However, elements with smaller atomic radii and higher electronegativities tend to favor HCP structure, while elements with larger atomic radii and lower electronegativities tend to favor FCC structure.
Yes, some elements can exist in both FCC and HCP structures, depending on the conditions under which they are formed. For example, titanium can exist in both FCC and HCP structures at different temperatures and pressures.
Yes, the crystal structure of an element can greatly affect its properties, such as density, strength, and conductivity. For example, HCP metals tend to be stronger and more ductile than FCC metals, and therefore are often used in structural applications.
Yes, the crystal structure of an element can be changed by altering the conditions under which it is formed or by applying external forces, such as pressure or temperature. This can result in a phase change, where the element transforms from one crystal structure to another.