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 English was in 1590. "Blush" has been a Crayola color since 1998. It was originally called "cranberry" but in 2005 the name was changed to "blush". Displayed at the right is the color smitten. "Smitten" is one of the colors on the Resene Color List, a color list widely popular in Australia and New Zealand. The color "smitten" was formulated in 2011. Medium red-violet is the medium tone of the color red-violet that is called "red-violet" in Crayola crayons. "Red-violet" has been a Crayola color since 1930. Displayed at the right is the color fandango. The first recorded use of