28 REVIEW AND BIBLIOGRAPHY 



CW2, is given up as giaphite on cooling. CW2 is an iron-gray compound, 

 very hard, not decomposed by atmospheric moisture, and of a sp. gr. = 

 16.06. 



LITERATURE. 



MoisSAN. Preparation au four electrique de quelques metaux refractoires ; tungstene, 

 molybdene, vanadium. Bull. Soc. Chim. [3] 11, p. 857, and C. R. (1893) 'i^' P- 

 1225, or Abs. J. Chem. Soc. (1893) 64, pt. 2, p. 471. 



MoissAN. Recherches sur le tungstene. Bull. Soc. Chim. (1896) [3] 16, p. 1289, and 

 C. R. 123, II. p. 13, or Ztschr. Elektrochem. (1896) III, p. 109. 



URANIUM AND CARBON. 



Commercial uranium oxide is purified and mixed with sugar-carbon 

 and submitted to the action of a current of 900 amp. and 50 volts for 

 five to ten minutes. The operation is carried on in a carbon crucible. 

 CgUro is the product ; crystalline ; sp. gr. = 1128 ; harder than quartz but 

 not as hard as corundum. This carbide is peculiar in its decomposition 

 with water. The reaction must be quite complex, for the products are : 

 Hg, C2H2, CH4, and beside these there are produced hydrocarbons, liquid 

 and solid, boiling between 70° and 2oo°C. Some of these are unsaturated 

 bodies which will reduce alkaline silver solutions. After distilling off 

 the hydrocarbons mentioned above, a bituminous residue remains. UrgCs 

 burns in Fl by gently heating, also in CI, O, N2O4, and Br, at temperatures 

 between 350° and 390°. 



LITERATURE. 



MoisSAN. Etude du carbure d'uranium. C. R. 122, p. 274, or Bull. Soc. Chim. [3] 11, 

 p. II, or Chem. Centrbl. (1896) 67, pt. i, p. 640, or Abs. J. Chem. Soc. (1896) 70, 

 pt. 2, p. 364. 



BuLLiER and Bignon. D. R. P. 77,166, and Ztschr. Angew. Chem. (1894) p. 655. 



VANADIUM AND CARBON. 



Vanadium anhydride and sugar-carbon subjected to the action of a cur- 

 rent of 900 amp. and 50 volts for nine to ten minutes in the electric fur- 

 nace yield VaC ; a beautifully crystalline compound, sp. gr. = 5.36, 

 harder than quartz, attacked by HNO3 in the cold. It burns vigorously 

 in oxygen at a dull red heat. Becomes incandescent if heated to 500° in 

 an atmosphere of CI. 



LITERATURE. 



MoisSAN. Preparation au four electrique de quelques metaux refractoires ; tungstene, 



molybdene, vanadium. C. R. 116, p. 1225, or Abs. J. Chem. Soc. (1893) 64, pt. 2, p. 



471, or Bull. Soc. Chim. [3] 11, p. 857. 

 MoissAN. Etude de la fonte et du carbure de vanadium. C. R. 122, p. 1297, or Abs. 



J. Chem. Soc. (1896) 70, pt. 2, p. 608, or Ztschr. Elektrochem. (1896) III, p. 92, or 



Bull. Soc. Chim. (1896) [3], 16, p. 1278. 



