+++
title = "Lattice with basis"
weight = 30
+++

### 2D lattice with basis

This example shows how to simulate a lattice with more than one particle per unit cell.
The particles that form a basis of the Bravais lattice are combined into a compound particle.

The sample of this specific example could also be represented by a square lattice with
only one particle per unit cell:
Just rotate by 45 degrees, and reduce the lattice constant to $1/\sqrt{2}$.
These two equivalent representations allow for a cross-check.

{{< galleryscg >}}
{{< figscg src="/img/draw/Lattice2dWithBasis_setup.jpg" width="350px" caption="Real-space model">}}
{{< figscg src="/img/auto/scatter2d/Lattice2dWithBasis.png" width="500px" caption="Scattering intensity">}}
{{< /galleryscg >}}

{{< show-ex file="scatter2d/Lattice2dWithBasis.py" >}}
