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What is meant by a body diagonal in a crystal lattice? How to find the formula of crystal when one body diagonal is removed?
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What is meant by a body diagonal in a crystal lattice? How to find the...
Understanding Body Diagonal in a Crystal Lattice
A body diagonal in a crystal lattice refers to the diagonal line that connects two opposite corners of a three-dimensional unit cell. This line traverses through the interior of the cell, passing through the center. It is significant as it helps in determining the geometry and dimensions of the unit cell.
Importance of Body Diagonal
- Geometric Representation: The body diagonal provides insight into the spatial arrangement of atoms in a crystal structure.
- Coordination Number: It influences the coordination number, which is the number of nearest neighbors surrounding an atom.
Finding the Formula When One Body Diagonal is Removed
When one body diagonal is removed from a crystal structure, the resulting changes can be analyzed as follows:
- Identify the Original Structure: Recognize the original unit cell and its formula based on the atoms and their positions.
- Analyze the Impact of Removal: Evaluate how the removal of a body diagonal affects atomic connectivity and symmetry. This can result in a shift in coordination numbers and bond lengths.
- Recalculate the Unit Cell: With the new arrangement, recalculate the number of atoms per unit cell.
- Derive the New Formula: The new empirical formula can be derived by adjusting the count of each type of atom based on the modified lattice.
Example of Modification
- Cubic Structure: For a cubic crystal, removing one body diagonal may lead to a change in symmetry, potentially altering it to a less symmetric form, such as a tetragonal or orthorhombic structure.
- Resulting Formula: If the original formula was AB with a specific ratio, the new formula could evolve to a different stoichiometric ratio depending on the remaining atomic arrangements.
By understanding these principles, you can effectively analyze the changes in crystal structures resulting from the removal of a body diagonal.
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What is meant by a body diagonal in a crystal lattice? How to find the formula of crystal when one body diagonal is removed?
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