Thulium (HCP)
allotrope
Tm
The hexagonal close-packed form of one of the rarest rare-earth metals
← Allotrope of Thulium
A crystalline allotrope of Thulium (space group P6_3/mmc), sourced from the Crystallography Open Database (COD 9008520).
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Crystallography
| Catalogue identity | Thulium — P6₃/mmc |
| Formula | Tm |
| Crystal system | hexagonal |
| Space group | P6_3/mmc |
| Lattice (a, b, c) Å | 3.5375, 3.5375, 5.5546 |
| Angles (α, β, γ) ° | 90, 90, 120 |
| Density (g/cm³) | 9.32 |
Structure data: Crystallography Open Database · Public domain (CC0)