| http://www.w3.org/ns/prov#value | - The silicon tetrahalide, phosphorus trihalide and silicon-phosphorus halide composition may also be produced by mixing powder silica, phosphorus and carbon or a metal such as magnesium, then heating the mixture to a high enough temperature in an electric furnace to where the carbon combines with the oxygen and a mixture of silicon phosphorus, phosphorus and silicon is produced, then an excess of h
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