Nitrogen allotropic

The a tetragonal form, firstly reported as a boron allotrope, has been reformulated as B50C2 or B50N2, depending on the preparative conditions it never forms in absence of carbon or nitrogen. 

Recently a team of chemists discovered a new allotrope of nitrogen that consisted of five nitrogen atoms in the form of a V. This surprised them because it was thought that any structure with three or more nitrogen atoms would be unstable—and indeed, the V form turned out to be so unstable that it created an extreme explosion that destroyed the equipment being used to analyze it. 

Although phosphorus is in group 15 with some other metalloids, it is usually classed as a nonmetal since it resembles nitrogen somewhat, the element above it in group 15. Both are essential to the biochemical field as vital elements to support life. Phosphorus has 10 known allotropic forms. This is an unusually high number for any element. A system of categorizing the allotropes by three colors has made it easier to keep track of them. These three colors are white, red, and black phosphorus. 

Colorless, odorless and tasteless gas diamagnetic density 1.229 g/L converts to a colorless liquid at -195.79°C specific gravity of the hquid N2 0.808 solidifies at -210 C solid nitrogen exists in two allotropic forms, a cubic alpha form and a hexagonal beta form alpha allotrope changes to beta form at -237.5°C critical temperature -146.94°C critical pressure 33.46 atm vapor pressure of the fluid at -203°C 5.1 torr the gas is slightly soluble in water, 2.4... 

F. P. Burt obtained what be regarded as a blue allotropic nitrogen tetrasulphide by passing the vapour of the ordinary sulphide under reduced press, over silver-gauze at 100°. There was formed a conspicuous sublimate of yellow sulphide, and further... 

Miss Katherine Williams, who worked for many years in the department on the chemistry of cooked fish, came first under Ramsay. It is said that he suggested that she should repeat the Cavendish experiment on air, but she chose something easier, the determination of the oxygen dissolved in water (p. 69). Later, when he and Miss K. Williams, at Bristol, were investigating an alleged allotropic form of nitrogen (Proc. Chem. Soc., 1886), he says that he suggested that she should... 

When molten sulfur is poured into ice water, the so-called plastic sulfur is obtained although normally this has S8 inclusions, it can be obtained as long fibers by heating Sa in nitrogen at 300°C for 5 min and quenching a thin stream in ice water. These fibers can be stretched under water and appear to contain helical chains of sulfur atoms with —3.5 atoms per turn. Unlike the other sulfur allotropes, catenasulfur is insoluble in CS2 it transforms slowly to S . 

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