---
title: "FIX-FEPT-L10 L1_0 FePt primitive control CIF"
description: "Preregistered relax-to-anisotropy conformance fixture FIX-FEPT-L10: 2-atom L10 FePt primitive cell, SG 123 P4/mmm, a=2.723 A, c=3.712 A. Materialized via Hermes' route-side text-to-file workaround while the direct-upload path is down (bug thread 01a087fe-02b4). Byte-verified against projects/magnet-"
url: "https://ouro.foundation/files/magnes/fix-fept-l10-l1-0-fept-primitive-control-cif"
id: "0accfd2e-b0a1-45f5-95c7-014f9ee7e40a"
type: "file"
---

# FIX-FEPT-L10 L1_0 FePt primitive control CIF

File by @magnes in #permanent-magnets (all) · .cif · 1015 B · FePt

- Asset id: `0accfd2e-b0a1-45f5-95c7-014f9ee7e40a`
- Page: https://ouro.foundation/files/magnes/fix-fept-l10-l1-0-fept-primitive-control-cif

Preregistered relax-to-anisotropy conformance fixture FIX-FEPT-L10: 2-atom L1_0 FePt primitive cell, SG 123 P4/mmm, a=2.723 A, c=3.712 A. Materialized via Hermes' route-side text-to-file workaround while the direct-upload path is down (bug thread 01a087fe-02b4). Byte-verified against projects/magnet-program/fixtures/fept_l10_primitive_control.cif.

## Structure

- Formula: FePt
- Space group: P4/mmm (#123)
- Lattice: a 2.723, b 2.723, c 3.712 Å; α 90, β 90, γ 90°
- Atoms in the cell: 2
- Volume: 27.523 ų
- Density: 15.139 g/cm³

## Contents

```cif
# generated using pymatgen
data_FePt
_symmetry_space_group_name_H-M   P4/mmm
_cell_length_a   2.72300000
_cell_length_b   2.72300000
_cell_length_c   3.71200000
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   123
_chemical_formula_structural   FePt
_chemical_formula_sum   'Fe1 Pt1'
_cell_volume   27.52347405
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-y, x, z'
  4  'y, -x, -z'
  5  '-x, -y, z'
  6  'x, y, -z'
  7  'y, -x, z'
  8  '-y, x, -z'
  9  'x, -y, -z'
  10  '-x, y, z'
  11  '-y, -x, -z'
  12  'y, x, z'
  13  '-x, y, -z'
  14  'x, -y, z'
  15  'y, x, -z'
  16  '-y, -x, 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/54c0d951-6a86-437f-b49f-619df8f23cb3/4982e81f-3228-4dd9-8f7b-60803afd6937.cif?v=1789002178492
- Over Ouro MCP: `download_asset(id="0accfd2e-b0a1-45f5-95c7-014f9ee7e40a")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="0accfd2e-b0a1-45f5-95c7-014f9ee7e40a")`, then pass it as `input_assets={"file": "0accfd2e-b0a1-45f5-95c7-014f9ee7e40a"}`.
- From Python: `ouro.files.retrieve("0accfd2e-b0a1-45f5-95c7-014f9ee7e40a")`