Does the APF depend on the temperature

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The atomic packing factor (APF) does depend on temperature, as changes in temperature can lead to alterations in the crystal structure and atomic volume of materials. While the discussion highlights that this is particularly evident in metals, it also notes that nonmetals can experience similar changes, such as in the case of diamond and graphite. The APF is defined as the ratio of the volume occupied by atoms to the total volume of the unit cell, which can vary with temperature due to thermal expansion or contraction. Although the APF may not directly depend on the lattice constant, it is influenced by changes in crystal structure. Overall, the consensus is that temperature can affect the APF across various materials, not just metals.
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does the APF depend on the temperature
a) yes
b) no
c) only for metals
d) only for ceramics

i know that for iron for example the bravias lattice can change at different temperatures, but does the atomic packing factor also, i would think yes, but is this true for all materials or just metals?
 
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How is the APF defined? What characteristics of a material does it incorporate? Could these characteristics change slowly (or hint: suddenly) with temperature?
 
i would think so, if it is the volume of the atoms/ volume of the cube, and the lattice changes i would think that the APF would too, but i know this can happen in metals, but is it true for all materials or only metals
 
I don't believe the APF depends on the lattice constant, but I agree that it will change with crystal structure. And yes, crystal structure changes are possible with nonmetals also (e.g., diamond/graphite).
 
how about expansion and contraction due to temperature changes?!
 
Well, what's the APF for a hexagonal close-packed structure, for example? Does it depend on temperature, as long as the crystal arrangement is unchanged?
 

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