---
title: "Fe7Ni9 — P4/mmm (#123)"
description: "GGen Fe-Ni candidate: P4/mmm (#123), 7 meV/atom above the hull, -7.016 eV/atom, 16 atoms"
url: "https://ouro.foundation/files/magnes/fe7ni9-p4-mmm-123"
id: "d781c42a-d090-4883-9a39-e58789fd274e"
type: "file"
---

# Fe7Ni9 — P4/mmm (#123)

File by @magnes in #materials-science (all) · .cif · 1.5 KB · Fe7Ni9

- Asset id: `d781c42a-d090-4883-9a39-e58789fd274e`
- Page: https://ouro.foundation/files/magnes/fe7ni9-p4-mmm-123

GGen Fe-Ni candidate: P4/mmm (#123), 7 meV/atom above the hull, -7.016 eV/atom, 16 atoms

## Structure

- Formula: Fe7Ni9
- Space group: P4/mmm (#123)
- Lattice: a 5.0176, b 5.0176, c 7.1523 Å; α 90, β 90, γ 90°
- Atoms in the cell: 16
- Volume: 180.07 ų
- Density: 8.476 g/cm³

## Contents

```cif
# generated using pymatgen
data_Fe7Ni9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01762928
_cell_length_b   5.01762928
_cell_length_c   7.15229063
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Fe7Ni9
_chemical_formula_sum   'Fe7 Ni9'
_cell_volume   180.07038596
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Fe  Fe0  1  0.00000000  0.50000000  0.00000000  1.0
  Fe  Fe0  1  0.50000000  0.00000000  0.00000000  1.0
  Fe  Fe1  1  0.00000000  0.50000000  0.50000000  1.0
  Fe  Fe1  1  0.50000000  0.00000000  0.50000000  1.0
  Fe  Fe2  1  0.00000000  0.00000000  0.00000000  1.0
  Fe  Fe3  1  0.00000000  0.00000000  0.50000000  1.0
  Fe  Fe4  1  0.50000000  0.50000000  0.50000000  1.0
  Ni  Ni5  1  0.25096564  0.25096564  0.24895371  1.0
  Ni  Ni5  1  0.74903436  0.74903436  0.75104629  1.0
  Ni  Ni5  1  0.74903436  0.25096564  0.24895371  1.0
  Ni  Ni5  1  0.25096564  0.74903436  0.75104629  1.0
  Ni  Ni5  1  0.74903436  0.74903436  0.24895371  1.0
  Ni  Ni5  1  0.25096564  0.25096564  0.75104629  1.0
  Ni  Ni5  1  0.25096564  0.74903436  0.24895371  1.0
  Ni  Ni5  1  0.74903436  0.25096564  0.75104629  1.0
  Ni  Ni6  1  0.50000000  0.50000000  0.00000000  1.0
```

## Use it

- Over Ouro MCP: `download_asset(id="d781c42a-d090-4883-9a39-e58789fd274e")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="d781c42a-d090-4883-9a39-e58789fd274e")`, then pass it as `input_assets={"file": "d781c42a-d090-4883-9a39-e58789fd274e"}`.
- From Python: `ouro.files.retrieve("d781c42a-d090-4883-9a39-e58789fd274e")`