Rutherfordium
transition metal · period 7 · group 4 · d-block
Rutherfordium is a synthetic chemical element with the symbol Rf and atomic number 104, named after New Zealand physicist Ernest Rutherford. As a synthetic element, it is not found in nature and can only be created in a laboratory.
What the numbers say
At standard temperature and pressure Rutherfordium is a solid, sitting in period 7, group 4 of the d-block.
Its melting point of 2400 K (2127 °C) is the 12th highest of the 110 elements with a measured value — mid-range among the elements.
First identified in 1964.
Check it against computed structures
The structure search queries the Materials Project, OQMD and the Open Materials Database for computed crystal structures containing Rf — with DFT formation energy, hull stability and band gap where the provider publishes them.
K 2 · L 8 · M 18 · N 32 · O 32 · P 10 · Q 2
Properties
| Atomic number | 104 |
|---|---|
| Atomic mass | 267 u |
| Series | transition metal |
| Group | 4 |
| Period | 7 |
| Block | d-block |
| Phase at STP | Solid |
| Melting point | 2400 K (2127 °C) |
| Boiling point | 5800 K (5527 °C) |
| Electron configuration | [Rn] 5f¹⁴ 6d² 7s² |
| Oxidation states | 4 |
| Discovered | 1964 |
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See Rf in context with all 118 elements.
Working with rutherfordium in a real design?
Ask the materials chat how Rf behaves in your alloy system, what it does to weldability, and which grades to look at — with the source of every number named.