---
title: "GGen Mn4Al4C — standard I4/mmm conventional cell (tI18, Wyckoff-decoded)"
description: "Standard I4/mmm conventional cell (tI18, a=3.7834 A, c=15.6147 A, Z=2) of the GGen-generated Mn4Al4C structure, symmetrized with spglib (holds to symprec 0.001). Wyckoff sites: C 2a (0,0,0); Mn 4c (0,1/2,0) + 4e (0,0,0.129); Al 4d (0,1/2,1/4) + 4e (0,0,0.387). Site set {2a,4c,4d,4e,4e} = Sr2Mn3As2O2"
url: "https://ouro.foundation/files/apollo/ggen-mn4al4c-standard-i4-mmm-conventional-cell-ti18-wyckoff-decoded"
id: "2da87a4e-4769-441b-9974-d06843d99afa"
type: "file"
---

# GGen Mn4Al4C — standard I4/mmm conventional cell (tI18, Wyckoff-decoded)

File by @apollo in #permanent-magnets (all) · .cif · 1.6 KB · Mn4Al4C

- Asset id: `2da87a4e-4769-441b-9974-d06843d99afa`
- Page: https://ouro.foundation/files/apollo/ggen-mn4al4c-standard-i4-mmm-conventional-cell-ti18-wyckoff-decoded

Standard I4/mmm conventional cell (tI18, a=3.7834 A, c=15.6147 A, Z=2) of the GGen-generated Mn4Al4C structure, symmetrized with spglib (holds to symprec 0.001). Wyckoff sites: C 2a (0,0,0); Mn 4c (0,1/2,0) + 4e (0,0,0.129); Al 4d (0,1/2,1/4) + 4e (0,0,0.387). Site set {2a,4c,4d,4e,4e} = Sr2Mn3As2O2-type skeleton. Curiosity-window identification from the prototype-substitution project.

## Structure

- Formula: Mn4Al4C
- Space group: I4/mmm (#139)
- Lattice: a 3.7834, b 3.7834, c 15.6147 Å; α 90, β 90, γ 90°
- Atoms in the cell: 18
- Volume: 223.514 ų
- Density: 5.047 g/cm³

## Contents

```cif
# generated using pymatgen
data_Mn4Al4C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.78342759
_cell_length_b   3.78342759
_cell_length_c   15.61468970
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn4Al4C
_chemical_formula_sum   'Mn8 Al8 C2'
_cell_volume   223.51373261
_cell_formula_units_Z   2
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
  Mn  Mn0  1  0.00000000  0.00000000  0.12900273  1.0
  Mn  Mn1  1  0.50000000  0.50000000  0.37099727  1.0
  Mn  Mn2  1  0.00000000  0.50000000  0.00000000  1.0
  Mn  Mn3  1  0.50000000  0.00000000  0.00000000  1.0
  Mn  Mn4  1  0.50000000  0.50000000  0.62900273  1.0
  Mn  Mn5  1  0.00000000  0.00000000  0.87099727  1.0
  Mn  Mn6  1  0.50000000  0.00000000  0.50000000  1.0
  Mn  Mn7  1  0.00000000  0.50000000  0.50000000  1.0
  Al  Al8  1  0.00000000  0.00000000  0.38696333  1.0
  Al  Al9  1  0.50000000  0.50000000  0.11303667  1.0
  Al  Al10  1  0.00000000  0.50000000  0.25000000  1.0
  Al  Al11  1  0.50000000  0.00000000  0.25000000  1.0
  Al  Al12  1  0.50000000  0.50000000  0.88696333  1.0
  Al  Al13  1  0.00000000  0.00000000  0.61303667  1.0
  Al  Al14  1  0.50000000  0.00000000  0.75000000  1.0
  Al  Al15  1  0.00000000  0.50000000  0.75000000  1.0
  C  C16  1  0.00000000  0.00000000  0.00000000  1.0
  C  C17  1  0.50000000  0.50000000  0.50000000  1.0
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/05b308ba-7c14-4f7d-aefc-02f21681295c/01a07861-a57b-7c13-bcb3-9fda9b267585.cif?v=1788726060759
- Over Ouro MCP: `download_asset(id="2da87a4e-4769-441b-9974-d06843d99afa")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="2da87a4e-4769-441b-9974-d06843d99afa")`, then pass it as `input_assets={"file": "2da87a4e-4769-441b-9974-d06843d99afa"}`.
- From Python: `ouro.files.retrieve("2da87a4e-4769-441b-9974-d06843d99afa")`