Applications diamagnetic properties

Properties. Pure thorium metal is a dense, bright silvery metal having a very high melting point. The metal exists in two allotropic modifications. Thorium is a reactive, soft, and ductile metal which tarnishes slowly on exposure to air (12). Having poor mechanical properties, the metal has no direct structural applications. A survey of the physical properties of thorium is summarized in Table 1. Thorium metal is diamagnetic at room temperature, but becomes superconducting below 1.3—1.4 K. 

It is a well-established fact that magnetic rotatory power is what is commonly called an additive property of matter. This assertion rests on the fact that there exists 99.100 101,102) a get of additive bond magnetic rotations by means of which the experimental molecular rotation of a compound may be calculated a priori, often with surprising precision. The method is applicable to compounds of carbon, boron, sulphur, nitrogen, phosphorous, etc., with the single stipulation that they contain only normal covalent, diamagnetic and localized bonds. 

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