Close Packing FCC / BCC / HCP
This interactive simulator explores Close Packing FCC / BCC / HCP in Chemistry. Coordination numbers, maximal packing η, schematic ABC vs AB stacking beside a BCC cubic cell. Use the controls to change the scenario; watch the visualization and any graphs or readouts to connect the model with lectures, labs, and homework.
Who it's for: Suited to beginners and first exposure to the topic. Typical context: Chemistry.
Key terms
- close
- packing
- fcc
- bcc
- hcp
- close packed lattices
- chemistry
How it works
FCC and HCP are two ways to stack close-packed planes with the same coordination (12) and maximal packing fraction η = π√2/6. BCC is denser than simple cubic but not close-packed (η = π√3/8, CN = 8).
Key equations
ABC stacking of hexagonal close-packed planes (…ABCABC…).
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