What is Packing fraction / packing efficiency of Unit Cells ?
12:34
Khan AcademyMoumita Sen
What is Packing fraction / packing efficiency of Unit Cells ?
In this video, we try to understand what packing fraction and packing efficiency means and see how we can use the effective number of atoms to figure out the packing fraction of unit cells.
7 个月之前
Atomic packing factor Crystal Structure
SOLVED: Calculate the Atomic Packing Factor (APF) for Body-Centered Tetragonal (BCT) structure. Assuming atoms are hard spheres, the Atomic Packing Factor for a given crystal structure can be expressed as: APF = Volume of atoms in unit cell / Volume of unit cellShow your work. Your answer should be symbolic. Hint: start by drawing the tetragonal unit cell and defining its lengths. Assume the atom at the center of the unit cell has a different radius (r2) than the atoms at the corners of the unit
SOLVED: Calculate the Atomic Packing Factor (APF) for Body-Centered Tetragonal (BCT) structure. Assuming atoms are hard spheres, the Atomic Packing Factor for a given crystal structure can be expressed as: APF = Volume of atoms in unit cell / Volume of unit cellShow your work. Your answer should be symbolic. Hint: start by drawing the tetragonal unit cell and defining its lengths. Assume the atom at the center of the unit cell has a different radius (r2) than the atoms at the corners of the unit
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