Silver phosphides

Rapid passage of gas into a cone, nitrate solution caused an explosion, or ignition of a slower gas stream. The explosion may have been caused by rapid oxidation of the precipitated silver phosphide derivative by the co-produced nitric acid or dinitrogen tetraoxide. 

The metal may be deposited on a piece of platinum, gold or carbon at some distance from the stick of phosphorus with which this is in contact. The silver phosphide which was first produced had the formula AgsP and phosphorous acid was formed simultaneously. The following equations were suggested as representing the various stages —... 

Silver phosphides.—At 400° C. silver and phosphorus-vapour combine to form the diphosphide, AgP2, a grey, crystalline mass.1 White phosphorus dissolves in molten silver, yielding white, crystalline products containing up to 20 per cent, of phosphorus. They are probably solid solutions of silver and phosphorus. Silver phosphide, Ag2P5, is precipitated as a brown, amorphous substance by the interaction of silver nitrate and a solution in liquid ammonia of rubidium phosphide, Rb2P5.2... 

PhoephoruA ia n reducing agent. Wh immersed in cuprio sulphate solution it becomes covered with a coating of metalUc copper. In silver nitrate solution itproducea a h k deposit of silver phosphide. 

Copper and tin phosphides are used as deoxidants in the production of the respective metals, to increase the tensile strength and corrosion resistance in phosphor bronze [12767-50-9] and as components of brazing solders (see Solders and brazing alloys). Phosphor bronze is an alloy of copper and 1.25—11 wt % tin. As tin may be completely oxidized in a copper alloy in the form of stannic oxide, 0.03—0.35 wt % phosphoms is added to deoxidize the alloy. Phosphor copper [12643-19-5] is prepared by the addition of phosphoms to molten copper. Phosphor tin [66579-64-4] 2.5—3 wt % P, is made for the deoxidation of bronzes and German silver. 

Silver(I) phosphide or arsenide complexes have been synthesized. The reaction of AgCl with Ph2PTMS in the presence of a tertiary phosphine gives polynuclear complexes such as... 

Soft, silver white metal that melts in the hand (29.8 °C) and remains liquid up to 2204 °C (difference 2174 °C, suitable for special thermometers). Gallium is quite widespread, but always in small amounts in admixtures. Its "career" took off with the advent of semiconductors. Ga arsenide and Ga phosphide, which are preferential to silicon in some applications, have extensive uses in microchips, diodes, lasers, and microwaves. The element is found in every mobile phone and computer. Ga nitride (GaN) is used in UV LEDs (ultraviolet light-emitting diodes). In this manner, a curiosity was transformed into a high-tech speciality. 

Tricopper diphosphide and trimercury tetraphosphide form impact-sensitive mixtures with potassium chlorate. By analogy, the phosphides of aluminium, magnesium, silver and zinc, etc., would be expected to form similar mixtures with metal halogenates. 

Passage of phosphine into silver nitrate solution causes ignition or explosion, depending on the gas rate. Mercuiy(II) nitrate solution gives a complex phosphide, explosive when dry. 

Phosphorus production technology, 79 5 Phosphorus production plants, 79 17 Phosphorus removal, as advanced wastewater treatment, 25 907 Phosphorus-rich phosphides, 79 59 Phosphorus selenides, 22 87 Phosphorus sesquisulfide, 79 47 Phosphorus-silver, UNS designation,... 

It reduces copper, silver and gold salts in solutions, precipitating metal phosphides or the metals themselves ... 

Which is the best catalyst for accelerating the reaction depends on the nature of the working materials. For the reaction of hydrogen or oxygen in potassium hydroxide solution, nickel or silver is suitable for carbonaceous fuels as well as for the reaction of oxygen in acid electrolytes platinum metals were up to the middle 60s, the only known catalysts. Precious metals are ruled out by price for wide application in fuel cells, and the search for cheaper catalysts has been actively pursued in many research laboratories. Many classes of inorganic substances (carbides, nitrides, oxides, sulfides, phosphides, etc.) have been investigated and, in particular, several chelates. 

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