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|image:Tetrahedral_kit.jpg|[https://3dprint.nih.gov/discover/3dpx-008126 Model building kit for tetrahedrally bonded diatomic crystals] | |image:Tetrahedral_kit.jpg|[https://3dprint.nih.gov/discover/3dpx-008126 Model building kit for tetrahedrally bonded diatomic crystals] | ||
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