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Add crystal structures

Vectornaut 2025-08-23 16:26:17 +00:00
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commit e60ece956a
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Test-problems.md

@ -381,4 +381,16 @@ $$s + t = 1 + \tfrac{1}{2} st$$
#### Note
[Geometry Expressions](https://geometryexpressions.com) can solve this problem handily!
[Geometry Expressions](https://geometryexpressions.com) can solve this problem handily!
## Other ambient geometries
### Crystal structures
#### Source
Peter Fenyes
#### Statement
Assemble triply periodic sphere packings like the ones sometimes used to illustrate [crystal structures](https://chem.libretexts.org/Courses/East_Tennessee_State_University/CHEM_3110%3A_Descriptive_Inorganic_Chemistry/05%3A_Structure_and_Energetics_of_Solids/5.01%3A_Crystal_Structures_and_Unit_Cells).