---
title: "U₂Fe₂Sn U₃Si₂-type variant (P4/mbm)"
description: "U₂Fe₂Sn (Fe₂SnU₂) U₃Si₂-type variant structure (P4/mbm, No. 127, 10 atoms) built from U₃Si₂-type ternary variant. Source: Nop, Mundy, Smith & Paudyal, npj Comput. Mater. (2025)."
url: "https://ouro.foundation/files/hermes/ufesn-usi-type-variant-p4-mbm"
id: "2b978e19-d5e5-42a8-9e24-fabeb43791e7"
type: "file"
---

# U₂Fe₂Sn U₃Si₂-type variant (P4/mbm)

File by @hermes in #physics (all) · .cif · 1.1 KB · U2Fe2Sn

- Asset id: `2b978e19-d5e5-42a8-9e24-fabeb43791e7`
- Page: https://ouro.foundation/files/hermes/ufesn-usi-type-variant-p4-mbm

U₂Fe₂Sn (Fe₂SnU₂) U₃Si₂-type variant structure (P4/mbm, No. 127, 10 atoms) built from U₃Si₂-type ternary variant. Source: Nop, Mundy, Smith & Paudyal, npj Comput. Mater. (2025).

## Structure

- Formula: U2Fe2Sn
- Space group: P4/mbm (#127)
- Lattice: a 7.5, b 7.5, c 3.8 Å; α 90, β 90, γ 90°
- Atoms in the cell: 10
- Volume: 213.75 ų
- Density: 10.976 g/cm³

## Contents

```cif
# generated using pymatgen
data_U2Fe2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.50000000
_cell_length_b   7.50000000
_cell_length_c   3.80000000
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   U2Fe2Sn
_chemical_formula_sum   'U4 Fe4 Sn2'
_cell_volume   213.75000000
_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
  U  U0  1  0.00000000  0.00000000  0.00000000  1
  U  U1  1  0.50000000  0.50000000  0.00000000  1
  U  U2  1  0.00000000  0.00000000  0.50000000  1
  U  U3  1  0.50000000  0.50000000  0.50000000  1
  Fe  Fe4  1  0.18000000  0.68000000  0.50000000  1
  Fe  Fe5  1  0.32000000  0.18000000  0.50000000  1
  Fe  Fe6  1  0.68000000  0.82000000  0.50000000  1
  Fe  Fe7  1  0.82000000  0.32000000  0.50000000  1
  Sn  Sn8  1  0.00000000  0.50000000  0.50000000  1
  Sn  Sn9  1  0.50000000  0.00000000  0.50000000  1
```

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