--- Log opened Sun Nov 21 00:00:39 2021
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07:58 < muurkha> Maana Electric doesn't claim the TerraBox can make TerraBoxes
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07:59 < muurkha> "can use any type of sand" makes me think it's fake
08:00 < muurkha> it's going to be a real trick to extract silicon from the gypsum sands at White Sands
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10:39 < nmz787> muurkha: currently sand is much too dirty for silicon chip source material, refining has to come waaaaayy down in price for that
10:49 < docl> maybe they're making low grade collectors from fused slag or something like that?
10:56 < docl> well, if you want purified silicon from random sand it might make sense to make tetrafluorosilane and grow the crystals in a vacuum chamber from that
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11:01 < docl> well tetrachlorosilane is more commonly used in industry I think. not sure you can dissolve as many different kinds of rock with HCl vs HF (perhaps being easier to handle is why it's used)
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17:06 < muurkha> nmz787: that's a question of economic competitiveness, not feasibility.  once you've reduced your silicon you can zone refine it as much as you want, and sooner or later you're guaranteed to get to whatever purity you want
17:09 < muurkha> much to my surprise, you can actually get SiF₄ just by digesting silicates with HF
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18:01 < darsie> And you can get HF by digesting CaF2 with H2OS4.
18:01 < darsie> H2SO4
18:02 < darsie> Perhaps mixing the three together.
18:07 < darsie> SiF4 can in principle also be generated by the reaction of silicon dioxide and hydrofluoric acid, but this process tends to give hexafluorosilicic acid: 
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--- Log closed Mon Nov 22 00:00:39 2021