Erbium - 68Er: crystal structures
- Space group: P63/mmc
- Space group number: 194
- Structure: hcp (hexagonal close-packed)
- Cell parameters:
- a: 355.88 pm
- b: 355.88 pm
- c: 558.74 pm
- α: 90.000°
- β: 90.000°
- γ: 120.000°
You may view the structure of erbium:
- interactively (best, but the page will take longer to load) or
- non-interactively

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References
F. H. Spedding, A. H. Daane, and K. W. Herrmann, Acta Crystallogr., 1956, 9, 559.