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Praseodymium Monophosphide
Praseodymium monophosphide is an inorganic compound of praseodymium and phosphorus with the chemical formula PrP. The compound forms crystals. Synthesis Praseoymium monophosphide can be prepared by heating praseodymium and phosphorus in the presence of iodine vapor: : Physical properties Praseodymium monophosphide forms crystals of a cubic system, space group ''Fmm'', with cell parameters a = 0.5872 nm, Z = 4, and structure like sodium chloride NaCl. It melts congruently at 3120 °C. References {{Phosphides Phosphides Praseodymium(III) compounds Rock salt crystal structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praseodymium Nitride
Praseodymium(III) nitride is a binary inorganic compound of praseodymium and nitrogen. Its chemical formula is . The compound forms black crystals, and reacts with water. Preparation Praseodymium(III) nitride can be prepared by the reaction of nitrogen and metallic praseodymium on heating: : It can also be prepared from the reaction of ammonia and praseodymium metal on heating: : Properties Praseodymium(III) nitride forms black crystals of a cubic system. The space group is ''Fm''3''m'', with cell parameter a = 0.5165 nm, Z = 4, its structure similar to that of sodium chloride (NaCl). The compound is readily hydrolyzed with water and reacts with acids. Applications The compound is used in high-end electric and semiconductor products, and as a raw material to produce phosphor. Also it is used as a magnetic material and sputtering target material. References {{Nitrides Nitrides Praseodymium(III) compounds Inorganic compounds Rock salt crystal structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praseodymium Arsenide
Praseodymium arsenide is a binary inorganic compound of praseodymium and arsenic with the formula PrAs. Preparation Praseodymium arsenide can be prepared by heating praseodymium and arsenic: ::\mathsf Physical properties Praseodymium arsenide forms cubic crystals, space group ''F m3m'', cell parameters ''a'' = 0.6009 nm, Z = 4, and structure like sodium chloride. When heated, it decomposes into arsenic and Pr4As3. At a pressure of 27 GPa, a phase transition to the tetragonal crystal system In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a squa ... occurs. See also * Praseodymium antimonide * Praseodymium bismuthide References {{Arsenides Praseodymium(III) compounds Arsenides Rock salt crystal structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praseodymium Antimonide
Praseodymium antimonide is a binary inorganic compound of praseodymium and antimony with the formula PrSb. Preparation Praseodymium antimonide can be prepared by heating praseodymium and antimony in a vacuum: ::\mathsf Physical properties Praseodymium antimonide forms cubic crystals, space group ''Fm'm'', cell parameters a = 0.638 nm, Z = 4, and structure like sodium chloride. The compound melts congruently at 2170 °C or 2161 °C. At a temperature of 1950 °C, a phase transition occurs in the crystals. At a pressure of 13 GPa, a phase transition also occurs. See also * Praseodymium arsenide Praseodymium arsenide is a binary inorganic compound of praseodymium and arsenic with the formula PrAs. Preparation Praseodymium arsenide can be prepared by heating praseodymium and arsenic: ::\mathsf Physical properties Praseodymium arseni ... * Praseodymium bismuthide References {{Antimony compounds Praseodymium(III) compounds Antimonides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praseodymium Bismuthide
Praseodymium bismuthide is a binary inorganic compound of praseodymium and bismuth with the chemical formula of PrBi. It forms crystals. Preparation Praseodymium bismuthide can be prepared by reacting stoichiometric amounts of praseodymium and bismuth at 1800 °C: :: \mathsf Physical properties Praseodymium bismuthide forms crystals of the cubic crystal system, with space group ''Fm'm'', cell parameters ''a'' = 0.64631 nm, Z = 4, and a structure like sodium chloride NaCl. The compound melts congruently at a temperature of roughly 1800 °С. At a pressure of 14 GPa, it undergoes a phase transition. See also * Praseodymium arsenide * Praseodymium antimonide Praseodymium antimonide is a binary inorganic compound of praseodymium and antimony with the formula PrSb. Preparation Praseodymium antimonide can be prepared by heating praseodymium and antimony in a vacuum: ::\mathsf Physical properties ... References {{Bismuth compounds Praseodymium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerium Phosphide
Cerium phosphide is an inorganic compound with the chemical formula CeP. It is one of the phosphides of cerium. It can be obtained by reacting cerium dioxide and phosphine at 1300 °C in the presence of hydrogen,Vasil'eva, I. G.; Mironov, K. E.; Mironov, Yu. I. Properties of cerium monophosphide. ''Redkozemel. Metal. Ikh Soedin., Mater. Vses. Simp.'', 1970: 160-165. . or by reacting sodium phosphide and cerium chloride at 700~800 °C. It will be oxidized to monoclinic CePO4 in air above 900 °C. It reacts with iodine in a quartz Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The Atom, atoms are linked in a continuous framework of SiO4 silicon–oxygen Tetrahedral molecular geometry, tetrahedra, with each oxygen being shared between two tet ... ampoule to obtain CeSiP3.Mironov, K. E.; Abdullin, R. V. Formation and chemical transfer of cerium silicon phosphide (CeSiP3). ''Zhurnal Neorganicheskoi Khimii'', 1980. 25 (8): 2062-2066. References Exter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neodymium Phosphide
Neodymium phosphide is an inorganic compound of neodymium and phosphorus with the chemical formula NdP. Preparation Neodymium phosphide can be obtained by reacting neodymium and phosphorus in a stoichiometric ratio: : Physical properties Neodymium phosphide forms cubic crystals, space group ''Fmm'', cell parameters a = 0.5838 nm, Z = 4. Uses The compound is a semiconductor used in high power, high frequency applications, and in laser diode file:Laser diode chip.jpg, The laser diode chip removed and placed on the eye of a needle for scale A laser diode (LD, also injection laser diode or ILD or semiconductor laser or diode laser) is a semiconductor device similar to a light-emittin ...s. References {{Phosphides Phosphides Neodymium(III) compounds Semiconductors Rock salt crystal structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inorganic Compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''. Inorganic compounds comprise most of the Earth's crust, although the compositions of the deep Mantle (geology), mantle remain active areas of investigation. All allotropes (structurally different pure forms of an element) and some simple carbon compounds are often considered inorganic. Examples include the allotropes of carbon (graphite, diamond, buckminsterfullerene, graphene, etc.), carbon monoxide , carbon dioxide , carbides, and salt (chemistry), salts of inorganic anions such as carbonates, cyanides, cyanates, thiocyanates, isothiocyanates, etc. Many of these are normal parts of mostly organic systems, including organisms; describing a chemical as inorganic does not necessarily mean that it cannot occur within life, living things. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Praseodymium
Praseodymium is a chemical element; it has symbol Pr and atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is too reactive to be found in native form, and pure praseodymium metal slowly develops a green oxide coating when exposed to air. Praseodymium always occurs naturally together with the other rare-earth metals. It is the sixth-most abundant rare-earth element and fourth-most abundant lanthanide, making up 9.1 parts per million of the Earth's crust, an abundance similar to that of boron. In 1841, Swedish chemist Carl Gustav Mosander extracted a rare-earth oxide residue he called didymium from a residue he called "lanthana", in turn separated from cerium salts. In 1885, the Austrian chemist Carl Auer von Welsbach separated didymium into two elements that gave salts of different colours, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphorus
Phosphorus is a chemical element; it has Chemical symbol, symbol P and atomic number 15. All elemental forms of phosphorus are highly Reactivity (chemistry), reactive and are therefore never found in nature. They can nevertheless be prepared artificially, the two most common allotropes being white phosphorus and red phosphorus. With as its only stable isotope, phosphorus has an occurrence in Earth's crust of about 0.1%, generally as phosphate rock. A member of the pnictogen family, phosphorus readily forms a wide variety of organic compound, organic and inorganic compound, inorganic compounds, with as its main oxidation states +5, +3 and −3. The isolation of white phosphorus in 1669 by Hennig Brand marked the scientific community's first discovery since Antiquity of an element. The name phosphorus is a reference to the Phosphorus (morning star), god of the Morning star in Greek mythology, inspired by the faint glow of white phosphorus when exposed to oxygen. This property is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Elements
American Elements is a global manufacturer and distributor of advanced materials with an over 35,000-page online product catalog and compendium of information on the chemical elements, advanced materials, and high technology applications. The company's headquarters and educational programs are based in Los Angeles, California. Its research and production facilities are located in Salt Lake City, Utah; Monterrey, Mexico;China; and Manchester, UK. History American Elements began as a toll chemical manufacturer and refiner serving U.S. mining companies by producing metal-based chemicals from their deposits. In 1998, its two largest customers, the Unocal/Molycorp rare-earth mine in Mountain Pass, California, and the Rhodia rare-earth refinery in Freeport, Texas closed, ending domestic U.S. rare-earth production. In response, the company established mining joint ventures in Inner Mongolia, China and in 1999 became one of the first post-Cold War companies to export rare-earth metals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Environmental Protection Agency
The Environmental Protection Agency (EPA) is an independent agency of the United States government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order. The order establishing the EPA was ratified by committee hearings in the House and Senate. The agency is led by its administrator, who is appointed by the president and approved by the Senate. The current administrator is Lee Zeldin. The EPA is not a Cabinet department, but the administrator is normally given cabinet rank. The EPA has its headquarters in Washington, D.C. There are regional offices for each of the agency's ten regions, as well as 27 laboratories around the country. The agency conducts environmental assessment, research, and education. It has the responsibility of maintaining and enforcing national standards under a variety of environmental laws, in consultat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Science+Business Media
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second-largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationally, op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
