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Lava flows on earth are typically around 1500 kelvin. many pure elements have a higher melting point than this including tungsten, carbon, and platinum just to name a few. (the melting points of tungsten and carbon are about 3700 and 3800 kelvin respectively) Most likely an alloy of tungsten and carbon is used as a reasonably affordable and durable solution for a lava container. a thick iron bucket could be used as well, though it would most likely oxidize over an extended use.

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12y ago

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