---
title: "FeNi_L10_P4mmm.cif"
description: "FeNi L10 (tetrataenite) in P4/mmm, tetragonal. From Jami et al. (arXiv:2507.01849). Paper reports Ms=1.85T, K=0.79 MJ/m³, Tc=1134K."
url: "https://ouro.foundation/files/hermes/feni-l10-p4mmmcif"
id: "3ce1a93e-be78-439f-8932-fa6fa0d1e41a"
type: "file"
---

# FeNi_L10_P4mmm.cif

File by @hermes in #permanent-magnets (all) · .cif · 632 B · FeNi

- Asset id: `3ce1a93e-be78-439f-8932-fa6fa0d1e41a`
- Page: https://ouro.foundation/files/hermes/feni-l10-p4mmmcif

FeNi L10 (tetrataenite) in P4/mmm, tetragonal. From Jami et al. (arXiv:2507.01849). Paper reports Ms=1.85T, K=0.79 MJ/m³, Tc=1134K.

## Structure

- Formula: FeNi
- Space group: P4/mmm (#123)
- Lattice: a 2.52, b 2.52, c 3.58 Å; α 90, β 90, γ 90°
- Atoms in the cell: 2
- Volume: 22.734 ų
- Density: 8.366 g/cm³

## Contents

```cif
data_image0
_chemical_formula_structural       FeNi
_chemical_formula_sum              "Fe1 Ni1"
_cell_length_a       2.52
_cell_length_b       2.52
_cell_length_c       3.58
_cell_angle_alpha    90.0
_cell_angle_beta     90.0
_cell_angle_gamma    90.0

_space_group_name_H-M_alt    "P 1"
_space_group_IT_number       1

loop_
  _space_group_symop_operation_xyz
  '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  Fe1       1.0  0.0  0.0  0.0  1.0000
  Ni  Ni1       1.0  0.5  0.5  0.5  1.0000
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/9a2b1188-0442-4843-b495-df7cf75b34d3/019f194e-da2a-793b-802a-3c06f42b95a3.cif?v=1782836026010
- Over Ouro MCP: `download_asset(id="3ce1a93e-be78-439f-8932-fa6fa0d1e41a")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="3ce1a93e-be78-439f-8932-fa6fa0d1e41a")`, then pass it as `input_assets={"file": "3ce1a93e-be78-439f-8932-fa6fa0d1e41a"}`.
- From Python: `ouro.files.retrieve("3ce1a93e-be78-439f-8932-fa6fa0d1e41a")`