Preparing a silane compound, comprises mixing silicide or silicon alloy with an aqueous solvent, f

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A process for preparing a compound or 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, comprising at least the following steps : step a) of mixing at least one silicide or silicon alloy powder m If formula m wherein 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 an aqueous solvent and fluidizing said mixture; b) reaction of the alloy fluidized from step a) with hydrochloric acid previously dissolved in an aqueous solution