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Strontium Arsenide, Sr3As2

Strontium Arsenide, Sr3As2, is prepared by the reduction of strontium arsenate by carbon in the electric furnace. It is very similar in appearance to calcium arsenide, forming a transparent crystalline mass, reddish-brown in thin sections, and of density 3.6 at 15° C. Fluorine reacts in the cold with incandescence, producing white fumes of arsenic fluoride. Chlorine reacts at 160° C., bromine above 200° C., and iodine vapour when strongly heated. The arsenide burns in oxygen and in sulphur vapour above a low red heat. Carbon decomposes it in the electric furnace, giving carbide. It reacts with water in the cold.

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