Atomistry » Arsenic » Chemical Properties » Arsenic Pentasilicide
Atomistry »
  Arsenic »
    Chemical Properties »
      Arsenic Pentasilicide »

Arsenic Pentasilicide, AsSi5

Arsenic Pentasilicide, AsSi5, has been prepared, however, by the action of hydrochloric acid on zinc silico-arsenide. The product was very impure, containing zinc, silica and arsenic monohydride; the last was removed by heating in a stream of hydrogen, and the zinc and silica were removed by treating with boiling nitric acid and aqueous alkali respectively. It remained as microscopic dark grey needles, stable when heated in air, and unattacked by concentrated acids or aqua regia.

A series of complex silico-arsenides has been obtained by melting metals with silicon and an excess of arsenic under a layer of molten cryolite and sodium chloride. The following have thus been prepared: copper silico-arsenide, a grey crystalline brittle mass; zinc silico-arsenide, which behaved as above with hydrochloric acid; iron, cobalt and nickel silico-arsenides, of composition M2Si9As4, similar in appearance to the copper compound. When platinum was treated in the same way, a hard white product of indefinite composition was obtained, almost insoluble in nitric acid.

Last articles

Xe in 6AYK
Xe in 6QII
Xe in 6ASM
Xe in 5NSW
Xe in 6FY9
Xe in 5O1K
Xe in 5O27
Xe in 5M69
Xe in 5KPU
Xe in 5I63
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy