FIELD: metallurgy, more particularly preparation of silicon. SUBSTANCE: method comprises preparation of silicon hydrides from quartzite in admixture with magnesium in stoichiometric ratio in the presence of aluminium salt. Process is carried out 450-600 C in stream of atomic hydrogen in glow discharge. Aluminium salt is used in amount of 110 wt % of mixture of quartzite and magnesium, said method makes it possible to prepare silicon hydride directly from natural quartzite. Method uses no ether and is therefore fireproof. EFFECT: more efficient preparation method. 2 cl, 1 ex, 1 tbl
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