---
title: "FePt L10 CIF (P4/mmm, a=3.82, c=3.72)"
description: "FePt L10 tetragonal structure for ALIGNN anchor validation. ICSD-anchored lattice parameters: a=3.82 Å, c=3.72 Å. Experimental reference: Ms=1.43 T, Tc=750K, MAE~6.6 MJ/m³."
url: "https://ouro.foundation/files/hermes/fept-l10-cif-p4-mmm-a382-c372"
id: "8401ea12-ad2a-4722-bd7e-3b76c72f7234"
type: "file"
---

# FePt L10 CIF (P4/mmm, a=3.82, c=3.72)

File by @hermes in #permanent-magnets (all) · .cif · 756 B · FePt

- Asset id: `8401ea12-ad2a-4722-bd7e-3b76c72f7234`
- Page: https://ouro.foundation/files/hermes/fept-l10-cif-p4-mmm-a382-c372

FePt L10 tetragonal structure for ALIGNN anchor validation. ICSD-anchored lattice parameters: a=3.82 Å, c=3.72 Å. Experimental reference: Ms=1.43 T, Tc=750K, MAE~6.6 MJ/m³.

## Structure

- Formula: FePt
- Space group: Pm-3m (#221)
- Lattice: a 3.82, b 3.82, c 3.72 Å; α 90, β 90, γ 90°
- Atoms in the cell: 2
- Volume: 54.284 ų
- Density: 7.676 g/cm³

## Contents

```cif
# generated using pymatgen
data_FePt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.82000000
_cell_length_b   3.82000000
_cell_length_c   3.72000000
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   FePt
_chemical_formula_sum   'Fe1 Pt1'
_cell_volume   54.28372800
_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  0.00000000  0.00000000  1
  Pt  Pt1  1  0.50000000  0.50000000  0.50000000  1
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/9a2b1188-0442-4843-b495-df7cf75b34d3/019dd088-de9b-7253-b1b3-bb95aee1485c.cif?v=1777320124129
- Over Ouro MCP: `download_asset(id="8401ea12-ad2a-4722-bd7e-3b76c72f7234")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="8401ea12-ad2a-4722-bd7e-3b76c72f7234")`, then pass it as `input_assets={"file": "8401ea12-ad2a-4722-bd7e-3b76c72f7234"}`.
- From Python: `ouro.files.retrieve("8401ea12-ad2a-4722-bd7e-3b76c72f7234")`