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
Black Red White Black Red White Black Red White is a leading furniture manufacturer in Poland, founded in Chmielek, Poland in 1991. The company's headquarters are located in Biłgoraj. Black Red White S.A. is the biggest Polish manufacturer of traditional and new furniture systems, home and office furniture, and upholstered fittings made of furniture panels, MDF and solid wood. BRW S.A. is an organization consisting of 17 production plants which employ over 6,000 people. Total production volume exceeding 180,000,000 sq ft of furniture panels a year, wholesale of over 7,000,000 cabinets annually and over 800 furniture models place BRW S.A. in the top