Allotropes of phosphorus Allotropes of phosphorus Elemental phosphorus can exist in several allotropes, the most common of which are white and red solids. Solid violet and black allotropes are also known. Gaseous phosphorus exists as diphosphorus and atomic phosphorus. White phosphorus, yellow phosphorus or simply tetraphosphorus (P) exists as molecules made up of four atoms in a tetrahedral structure. The tetrahedral arrangement results in ring strain and instability. The molecule is described as consisting of six single P–P bonds. Two different crystalline forms are known. The α form is defined as the standard state of the element, but is actually metastable under standard
Red-violet the right is displayed the color kobi. The color name "kobi" for this light tone of red-violet has been in use since 2001, when it was promulgated as one of the colors on the Xona.com Color List. The color pink lavender is displayed at the right. The source of this color is the "Pantone Textile Paper eXtended (TPX)" color list, color #14-3207 TPX—Pink Lavender. Puce is a medium grayish red-violet color. The color pale red-violet (identical to the web color "pale violet red") is displayed at the right. This color is a pale tone of red-violet. The color violet-red is