---
title: "Zr₆Fe₁₂Ge₄C, U₆Co₁₂Ge₄C type (Im-3m), above the PBE hull"
description: "Primitive cell (23 atoms), relaxed with Orb v3. Built by substitution from the U₆Co₁₂Ge₄C prototype (U→Zr, Co→Fe). New composition (not in Materials Project, Alexandria, GNoME or COD). Orb hull 8.7 meV/atom; +22.6 meV/atom above ZrFeGe + Zr₃GeC₂ + Zr₂Fe₃Ge + Fe in PBE (ABACUS, TZDP single point). Su"
url: "https://ouro.foundation/files/mmoderwell/zr6fe12ge4c-u6co12ge4c-type-im-3m-above-the-pbe-hull"
id: "019b79a0-1449-4014-83b0-cd8607400d20"
type: "file"
---

# Zr₆Fe₁₂Ge₄C, U₆Co₁₂Ge₄C type (Im-3m), above the PBE hull

File by @mmoderwell in #permanent-magnets (all) · .cif · 1.8 KB · Zr6Fe12Ge4C

- Asset id: `019b79a0-1449-4014-83b0-cd8607400d20`
- Page: https://ouro.foundation/files/mmoderwell/zr6fe12ge4c-u6co12ge4c-type-im-3m-above-the-pbe-hull

Primitive cell (23 atoms), relaxed with Orb v3. Built by substitution from the U₆Co₁₂Ge₄C prototype (U→Zr, Co→Fe). New composition (not in Materials Project, Alexandria, GNoME or COD). Orb hull 8.7 meV/atom; +22.6 meV/atom above ZrFeGe + Zr₃GeC₂ + Zr₂Fe₃Ge + Fe in PBE (ABACUS, TZDP single point). Sun-tetragonal campaign, loop 5: a sibling of Zr₆Fe₁₂Si₄C that does not hold up.

## Structure

- Formula: Zr6Fe12Ge4C
- Space group: Im-3m (#229)
- Lattice: a 7.4822, b 7.4822, c 7.4822 Å; α 109.47, β 109.47, γ 109.47°
- Atoms in the cell: 23
- Volume: 322.451 Å³
- Density: 7.828 g/cm³

## Contents

```cif
# generated using pymatgen
data_Zr6Fe12Ge4C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.48218834
_cell_length_b   7.48218834
_cell_length_c   7.48218834
_cell_angle_alpha   109.47122063
_cell_angle_beta   109.47122063
_cell_angle_gamma   109.47122063
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zr6Fe12Ge4C
_chemical_formula_sum   'Zr6 Fe12 Ge4 C1'
_cell_volume   322.45121483
_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
  Zr  Zr0  1  0.27149376  0.27149376  0.00000000  1
  Zr  Zr1  1  0.72850624  0.72850624  0.00000000  1
  Zr  Zr2  1  1.00000000  0.27149376  0.27149376  1
  Zr  Zr3  1  1.00000000  0.72850624  0.72850624  1
  Zr  Zr4  1  0.27149375  0.00000000  0.27149376  1
  Zr  Zr5  1  0.72850624  1.00000000  0.72850624  1
  Fe  Fe6  1  1.00000000  0.65835444  0.34164556  1
  Fe  Fe7  1  1.00000000  0.34164556  0.65835444  1
  Fe  Fe8  1  0.65835444  0.31670888  0.65835444  1
  Fe  Fe9  1  0.34164556  0.68329112  0.34164556  1
  Fe  Fe10  1  0.31670888  0.65835444  0.65835444  1
  Fe  Fe11  1  0.68329111  0.34164556  0.34164556  1
  Fe  Fe12  1  0.65835444  1.00000000  0.34164556  1
  Fe  Fe13  1  0.34164556  1.00000000  0.65835444  1
  Fe  Fe14  1  0.65835444  0.65835444  0.31670888  1
  Fe  Fe15  1  0.34164556  0.34164556  0.68329111  1
  Fe  Fe16  1  0.34164556  0.65835444  1.00000000  1
  Fe  Fe17  1  0.65835444  0.34164556  1.00000000  1
  Ge  Ge18  1  0.50000000  0.50000000  0.50000000  1
  Ge  Ge19  1  0.50000000  1.00000000  1.00000000  1
  Ge  Ge20  1  1.00000000  1.00000000  0.50000000  1
  Ge  Ge21  1  1.00000000  0.50000000  1.00000000  1
  C  C22  1  1.00000000  0.00000000  0.00000000  1
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/847f4445-78ee-41b1-913b-5bd155c71b13/01a1d61a-ac1d-78d9-b4e9-5c0d9ad713d4.cif?v=1794605158432
- Over Ouro MCP: `download_asset(id="019b79a0-1449-4014-83b0-cd8607400d20")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="019b79a0-1449-4014-83b0-cd8607400d20")`, then pass it as `input_assets={"file": "019b79a0-1449-4014-83b0-cd8607400d20"}`.
- From Python: `ouro.files.retrieve("019b79a0-1449-4014-83b0-cd8607400d20")`
