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evo-crystallography-fraction-format

Converts floating-point fractional coordinates to clean rational fraction strings with bounded denominators (<=12), handling edge cases like near-zero/near-one wrapping and integer values.

tasks-evolved/crystallographic-wyckoff-position-analysis/environment/skills/evo-crystallography-fraction-format/SKILL.md

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Sep 10, 2026
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# evo-crystallography-fraction-format

Converts floating-point crystallographic fractional coordinates to rational fraction strings.

## Key Functions

- `float_to_fraction_string(val, max_den=12)` - Convert single float to fraction string
- `rationalize_coordinate_vector(coords, max_den=12)` - Convert 3-element coordinate vector to list of fraction strings

## Usage

```python
import sys
sys.path.insert(0, '/app/environment/skills/evo-crystallography-fraction-format/scripts')