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## Format: PW

Name: Quantum Espresso PWscf output format

Extension: out

Specification: Quantum Espresso documentation

Visualization programs: none

#### Restrictions

Atomsk can read Quantum Espresso PWscf output files (*.out) only through the mode one-in-all. Each snapshot will then be converted to a separate file.

If forces are defined, then they will be read by Atomsk. Whether forces will appear or not in the final file depends if the output format supports it.

By default in the Quantum Espresso PW file format, all quantities whose dimensions are not explicitly specified are in Rydberg atomic units, in particular cell dimensions and atom positions are in units of Bohr radius. So, if cell dimensions and atom coordinates are all expressed in the same units (e.g. all in Bohr, or all in anstroms), then Atomsk conserves this unit (i.e. coordinates are NOT converted to angstroms). However, if no unit is specified for the cell (meaning it is in Bohr), while the atom coordinates are specified in angstroms, then the cell vectors are converted to angströms for consistency. To convert units, one can also use the option `-unit`.

Atomsk can not write Quantum Espresso PWscf output files.

#### Examples

- `atomsk --one-in-all vc-relax.out xsf`

  This will read the Quantum Espresso output file `vc-relax.out`, and output each snapshot in a separate XSF file: `vc-relax_1.xsf`, `vc-relax_2.xsf`, etc.

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