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A solid solution, a term popularly used for metals, is a homogeneous mixture of two compounds in solid state and having a single crystal structure. [1] Many examples can be found in metallurgy , geology , and solid-state chemistry .
Hume-Rothery rules, named after William Hume-Rothery, are a set of basic rules that describe the conditions under which an element could dissolve in a metal, forming a solid solution. There are two sets of rules; one refers to substitutional solid solutions, and the other refers to interstitial solid solutions.
It forms the colorless Ra 2+ cation in aqueous solution, which is highly basic and does not form complexes readily. [5] Most radium compounds are therefore simple ionic compounds, [5] though participation from the 6s and 6p electrons (in addition to the valence 7s electrons) is expected due to relativistic effects and would enhance the covalent ...
Irradiation of a solution at pH 2.7 forms a mixture of the colloid and the soluble Tc(IV) compounds. [16] Gamma irradiation has been used in the synthesis of nanoparticles of gold on iron oxide (Fe 2 O 3). [17] It has been shown that the irradiation of aqueous solutions of lead compounds leads to the
Radium fluoride (RaF 2) is a highly radioactive compound. It can be coprecipitated with lanthanide fluorides. [4] Radium fluoride has the same crystal form as calcium fluoride . It can be prepared by the reaction of radium metal and hydrogen fluoride gas: [citation needed] Ra + 2 HF → RaF 2 + H 2. Radium chloride (RaCl 2) is a colorless ...
The alpha form of solid polonium. Polonium is a radioactive element that exists in two metallic allotropes. The alpha form is the only known example of a simple cubic crystal structure in a single atom basis at STP (space group Pm 3 m, no. 221). The unit cell has an edge length of 335.2 picometers; the beta form is rhombohedral.
Two other methods are reported, the chlorostannate process and the ferrocyanide process. [30] [37] For several years in the 1950s and 1960s, a by-product of potassium production called Alkarb was a main source for rubidium. Alkarb contained 21% rubidium, with the rest being potassium and a small amount of caesium. [38]
The formation of 99 TcO 2 on steel surfaces is one effect which will retard the release of 99 Tc from nuclear waste drums and nuclear equipment which has been lost before decontamination (e.g. submarine reactors lost at sea). This 99 TcO 2 layer renders the steel surface passive, inhibiting the anodic corrosion reaction. The radioactive nature ...