# SRO
A 40 Å cubic copper supercell (~5202 atoms), short-range order.
[`copper_sro_generate.py`](../../_static/mace/copper/sro_generate.py) reproduces this case.
## Orientation refinement
## MACE+wall relaxation
## Energy
```{image} ../../_static/mace/copper/sro_energy_curve.png
:alt: Copper SRO MACE energy per atom
:width: 100%
```
| stage | E (eV/atom) |
|---|---:|
| after orientation refinement | -3.241 |
| after cleanup | -3.904 |
| after MACE | -3.980 |
## g₃ distributions
**After cleanup**
**After MACE**
## Bond length and angle distributions
```{image} ../../_static/mace/copper/sro_bond_hist.png
:alt: Copper SRO bond length distribution
:width: 100%
```
```{image} ../../_static/mace/copper/sro_angle_hist.png
:alt: Copper SRO angle distributions
:width: 100%
```
```{image} ../../_static/mace/copper/sro_gr.png
:alt: Copper SRO pairwise g(r)
:width: 100%
```