Assertion: osmium | /r/HasProperty | fired to white cigarette
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Source sentences:
text: The osmium that may exist in the oxidation absorption liquid except that the ruthenium absorption liquid behind the osmium adds analytical pure ammonium chloride while hot, makes ruthenium with black ruthenium hydrochloride ammonium ((NH with the perosmic anhydride gaseous volatilization 4 ) 2 RuCl 6 ) separate out from solution; The ruthenium hydrochloride ammonium separates with mother liquor, uses the washing with alcohol secondary, and oven dry is fired to no white cigarette and overflows under 400～500 ℃; Put into quartz boat, use hydrogen reducing in tube furnace, temperature is 750～900 ℃, time 2～4h; After reduction finished, the cooling that has a power failure when furnace temperature is cooled to 400 ℃, changed logical argon gas or nitrogen and continues to be cooled to 100 ℃ with bottom discharge, and the ruthenium powder gets product.