Preparing mixture of silane and germane compounds, involves reacting mixture of alloy containing si

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Process for the preparation of a mixture of compounds of formula if H wherein n is an integer greater than or equal to 1 and less than or equal to 3 and germane of formula GEH comprising a step a) of reaction of a mixture of alloys containing at least a silicon alloy powder m m Si and at least one germanium alloy powder m M in which M is a reducing metal, M an alkali metal or alkaline earth metal, X, and vary from 0 to 1, 0 and z being different from the sum x+y different from 0, with hydrochloric acid previously dissolved in an aqueous solution.