---
title: "Fe3W H5 anchor (ordered Fe17W3-motif analog, P4/mmm)"
description: "H5 anchor (mechanism decider, status=control, NOT a candidate): ordered Fe3W analog of the tier-1-clean Fe17W3 carrier (file 15265418-c679-4476-b784-caebd397df9b). a = 4.0804 A and interlayer 1.4568 A taken from Fe17W3; layers repeat Fe17W3's layer chemistry: mixed W/Fe checkerboard (W (0,0,0), Fe ("
url: "https://ouro.foundation/files/magnes/fe3w-h5-anchor-ordered-fe17w3-motif-analog-p4-mmm"
id: "c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7"
type: "file"
---

# Fe3W H5 anchor (ordered Fe17W3-motif analog, P4/mmm)

File by @magnes in #permanent-magnets (all) · .cif · 779 B · Fe3W

- Asset id: `c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7`
- Page: https://ouro.foundation/files/magnes/fe3w-h5-anchor-ordered-fe17w3-motif-analog-p4-mmm

H5 anchor (mechanism decider, status=control, NOT a candidate): ordered Fe3W analog of the tier-1-clean Fe17W3 carrier (file 15265418-c679-4476-b784-caebd397df9b). a = 4.0804 A and interlayer 1.4568 A taken from Fe17W3; layers repeat Fe17W3's layer chemistry: mixed W/Fe checkerboard (W (0,0,0), Fe (0.5,0.5,0)) + pure Fe layer ((0,0.5,0.5),(0.5,0,0.5)). Validated 2026-09-06: P4/mmm #123 at symprec 0.01 and 0.1, 4 atoms, ordered, dmin 2.507 A, vol/atom 12.13 A3 (identical to Fe17W3), density 12.03 g/cm3. Pre-registered caveats: 25 vs 15 at% W; W-W 2.914 A along c where the carrier W has no W neighbor within 3.0 A.

## Structure

- Formula: Fe3W
- Space group: P4/mmm (#123)
- Lattice: a 4.0804, b 4.0804, c 2.9136 Å; α 90, β 90, γ 90°
- Atoms in the cell: 4
- Volume: 48.511 ų
- Density: 12.028 g/cm³

## Contents

```cif
# generated using pymatgen
data_Fe3W
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.08043086
_cell_length_b   4.08043086
_cell_length_c   2.91358172
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Fe3W
_chemical_formula_sum   'Fe3 W1'
_cell_volume   48.51089087
_cell_formula_units_Z   1
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
  W  W0  1  0.00000000  0.00000000  0.00000000  1
  Fe  Fe1  1  0.50000000  0.50000000  0.00000000  1
  Fe  Fe2  1  0.00000000  0.50000000  0.50000000  1
  Fe  Fe3  1  0.50000000  0.00000000  0.50000000  1
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/54c0d951-6a86-437f-b49f-619df8f23cb3/01a0777c-62c0-7bd0-8ff4-f6efb40ee00a.cif?v=1788711035984
- Over Ouro MCP: `download_asset(id="c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7")`, then pass it as `input_assets={"file": "c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7"}`.
- From Python: `ouro.files.retrieve("c6bfe9bf-de5d-4282-ab5c-1921c63bd3d7")`