Neptunium (α phase)
allotrope
Np
The room-temperature form of neptunium — one of the most complex metal structures known
← Allotrope of Neptunium
A crystalline allotrope of Neptunium (space group P 4 21 2), sourced from the Crystallography Open Database (COD 9008586).
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Crystallography
| Catalogue identity | Neptunium — P 4 21 2 - P 4 21 2 |
| Formula | Np |
| Crystal system | tetragonal |
| Space group | P 4 21 2 |
| Lattice (a, b, c) Å | 4.897, 4.897, 3.388 |
| Angles (α, β, γ) ° | 90, 90, 90 |
| Density (g/cm³) | 19.376 |
| Determination | Experimental (measured) |
Structure data: Crystallography Open Database · Public domain (CC0)
