wyckoffs:
- "m"
- "m"
- "m"
- "m"
- "m"
- "m"
- "m"
- "m"
- "i"
- "k"
- "j"
- "f"
- "i"
- "k"
- "j"
- "k"
- "f"
- "i"
- "j"
- "f"
- "f"
- "k"
- "i"
- "j"