Thallium magnetic susceptibility

Properties. — Thallium is a white metal with blue tint, and when freshly cut it has a brilliant metallic luster. It is so soft that it may easily be marked with the thumb nail and leaves a black streak on paper. It is malleable but has little tenacity, and when an attempt is made to cut it with a file or saw it stops up the teeth of the tool. It has a crystalline structure and emits a sound similar to the tin cry. It exists in two modifications, the transition temperature bang 226°. It melts at 303°, commences to volatilize at 174°, boils under atmospheric pressure at 1515°, and may be distilled in a stream of hydrogen. The coefficient of expansion is 0.000031 and the coefficient of compressibility is 2.33 X 10- per atmosphere. The latent heat of fusion is 7.2 calories per gram, the mean specific heat is about 0.03. The electrical conductivity1 in reciprocal ohms per cubic centimeter at 20° is 5.28 and the magnetic susceptibility is—29 X 10-6C,g.s. units per unit volume. In the electromotive series thallium comes between iron and cobalt. 

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