[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an almost silver-white, ductile, malleable, lustrous solid. mp 232 \u00b0C, bp: 2507 \u00b0C. Density: 7.3 g/cm3. Pure white tin becomes non-metallic powdery gray tin if held for a sustained period at temperatures less than 13 \u00b0C."}, {"from": "gpt", "value": "[Sn]"}]