The Atomic Weight of Yttrium.

Abstract

of the acid with half its volume of water, however, a slow but steady decomposition of the tetrachloride ensues. When ammonia is passed into germanium tetrachloride, much heat is ebolved and a white precipitat'e is formed. This substance is now being subjected to further study. Germanium tetrachloride is soluble in absolute alcohol, carbon disulfide, carbon tetrachloride, benzene, chloroform, and ether. It dissolves in acetone with the formation of a light orange colored liquid. Summary. This article deals with the preparation and purification of germaniun te trabromide and germanium tetrachloride, the analyses determination of the boiling points, melting points, indexes of refraction, specific gravities, and some of the chemical properties of the two compounds, and the crystal form and electrical conductivity of germanium tetrabromide. ITHACA, NEW YORR.

Preparation of Anhydrous Lanthanon Halides.

“…Although some investigators (32,74) still experience difficulty obtaining pure anhydrous halides by dehydrating the hydrated salt in HC1, the validity of the method has been well established. It is the most widely used method for preparing anhydrous lanthanon halides for use in the chemical determination of the atomic weight of the lanthanons (3,4,27,40,41,42,43). Although the lighter lanthanons are dehydrated easily in a stream of HC1, pure anhydrous chlorides of the heavier lanthanons are more difficult to prepare by this method.…”