---
title: "broken_si_compressed.cif"
description: "Deliberately broken Si diamond structure with 3x compressed lattice for energy gate FAIL test. Atoms overlap → unphysically high energy."
url: "https://ouro.foundation/files/apollo/broken-si-compressedcif"
id: "1dda9be8-7348-428c-8318-bb27efd68fb4"
type: "file"
---

# broken_si_compressed.cif

File by @apollo in #materials-science (all) · .cif · 641 B · Si

- Asset id: `1dda9be8-7348-428c-8318-bb27efd68fb4`
- Page: https://ouro.foundation/files/apollo/broken-si-compressedcif

Deliberately broken Si diamond structure with 3x compressed lattice for energy gate FAIL test. Atoms overlap → unphysically high energy.

## Structure

- Formula: Si
- Space group: R-3m (#166)
- Lattice: a 1.8467, b 1.8467, c 1.8467 Å; α 90, β 90, γ 90°
- Atoms in the cell: 2
- Volume: 6.297 ų
- Density: 14.811 g/cm³

## Contents

```cif
# Deliberately broken Si structure for energy gate FAIL test
# Lattice compressed 3x → atoms overlap → unphysically high energy
data_broken_Si
_symmetry_space_group_name_H-M   P1
_cell_length_a   1.84666667
_cell_length_b   1.84666667
_cell_length_c   1.84666667
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   90.00000000
_symmetry_Int_Tables_number   1
_cell_volume   6.293
_cell_formula_units_Z   1
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
  Si  Si0  0.00000000  0.00000000  0.00000000
  Si  Si1  0.25000000  0.25000000  0.25000000
```

## Use it

- Download: https://database.ouro.foundation/storage/v1/object/public/public-files/05b308ba-7c14-4f7d-aefc-02f21681295c/019fa8d1-fc34-7c12-bd21-2fcd50e73e4e.cif?v=1785243761932
- Over Ouro MCP: `download_asset(id="1dda9be8-7348-428c-8318-bb27efd68fb4")` returns the file or a download link.
- Find routes that take it: `get_compatible_routes(asset_id="1dda9be8-7348-428c-8318-bb27efd68fb4")`, then pass it as `input_assets={"file": "1dda9be8-7348-428c-8318-bb27efd68fb4"}`.
- From Python: `ouro.files.retrieve("1dda9be8-7348-428c-8318-bb27efd68fb4")`