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Crystal Structures
Notes
Crystalline :
Amorphous:
Ionic:
Metallic:
Covalent Network:
Molecular:
Simple Cubic
Number of atoms/cell =
a=
Polonium forms a simple cubic unit cell. The radius of a Po atom is 118 pm. What is the volume of a unit cell of
polonium? How many atoms are there per unit cell of polonium?
Face Centered Cubic
Number of atoms/cell =
a=
Nickel forms a face centered cubic unit cell. The radius of a nickel atom is 125 pm. What is the density of nickel in
grams/cm3?
Body Centered Cubic
Number of atoms/cell =
a=
Tungsten forms a body centered cubic unit cell. The density of tungsten is 19.3 g/cm3. What is the radius of a tungsten
atom?
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