thorium phosphates orthorhombic

thorium phosphates orthorhombic

  • Thermal synthesis and structural characterization of the

    Abstract Polycrystalline thorium(IV) phosphatetriphosphate, Th 2(PO 4)(P 3O 10)(1), was obtained by (NH 4) 2Th(PO 4) 2 H 2O(2) heating from room temperature to 1,273 K 12003年4月1日· Tetravalent thorium and uranium diphosphates have been synthesized for a long time Both are stable in the cubic and orthorhombic form [12], [13], [14] TheseSynthesis, characterization, and structure determination of the

  • New Hydrothermal Synthesis and Structure of

    2005年4月15日· Its crystal structure is based in a sequence of layers of thorium and phosphate groups (A) New Hydrothermal Synthesis and Structure of2008年12月1日· We report the synthesis of thorium diphosphate ThP 2 O 7 and its study by Raman spectroscopy and Rietveld analysis This compound has been found to beSynthesis, Raman and Rietveld analysis of thorium diphosphate

  • Thermal synthesis and structural characterization of the

    framework thorium(IV) is hexacoordinated [4] This contribution reports both the thermal synthesis and the crystal structure of βThP 2O7, obtained from (NH 4)2Th(PO 4)2·H 2O2014年11月1日· Polycrystalline thorium (IV) phosphatetriphosphate, Th2 (PO4) (P3O10) (1), was obtained by (NH4) (2)Th (PO4) (2)center dot H2O (2) heating from roomThermal synthesis and structural characterization of the

  • Phosphorous Acid and Urea: Valuable Sources of Phosphorus and

    Thorium(IV) phosphatetriphosphate: A valuable ceramic material obtained by thermal treatment of a layered ammoniumthorium(IV) phosphate Kinetic analysis of the2006年10月1日· βThorium phosphate diphosphate (βTPD), considered as a very promising radwaste storage material, was obtained from thorium phosphateFrom thorium phosphate hydrogenphosphate hydrate to

  • Solubility product of the thorium phosphate hydrogenphosphate

    2017年1月7日· It crystallises in an orthorhombic system, Pbcm, Z = 2 [ Analogous to the monazitetype phosphates, thorium phosphate hydrogenphosphate hydrates (Th 2of the orthorhombic Th 2(PO 4)(P 3O 10) Jorge Garcı´aGlez • Bele´n F Alfonso • Jose´ A Huidobro • Sergei A Khainakov • Germa´n R Castro • Camino Trobajo Received: 29 October 2013/Accepted: 4 June 2014/Published online: 20 July 2014 Akade´miai Kiado´, Budapest, Hungary 2014 Abstract Polycrystalline thorium(IV) phosphateThermal synthesis and structural characterization of the orthorhombic

  • Synthesis, characterization, and structure determination of the

    2003年4月1日· Tetravalent thorium and uranium diphosphates have been synthesized for a long time Both are stable in the cubic and orthorhombic form [12], [13], [14] These compounds are respectively noted α ThP 2 O 7, α UP 2 O 7 and β ThP 2 O 7, β UP 2 O 7 These solids were synthesized only in powder form2004年12月1日· In this article, the chemistry of phosphates of tetravalent actinides (Th, Pa, U, Np, Pu) and nonactinide elements (Si, Sn, Pb, Ti, Zr, Hf, Ce) is reviewed up to 2004 A systematic, based on a general framework [ (M h) m (A q) p]Chemistry of tetravalent actinide phosphates—Part II

  • Hydrothermal Synthesis and Characterization of the Thorium

    2001年6月1日· It crystallises in an orthorhombic system, Pbcm, Z = 2 [ Analogous to the monazitetype phosphates, thorium phosphate hydrogenphosphate hydrates (Th 2 (PO 4 ) 2 (HP O 4 )·H 2 O (TPHPH)) wereorthorhombic Th 2(PO 4)(P 3O10) Jorge GARCIAGLEZ 1, Belén F ALFONSO 1, José A HUIDOBRO 1, we reported the synthesis of the first ammoniumthorium phosphates, (NH 4)2Th(PO 4)2·H 2O and NH 4Th 2(PO 4)3, which were structurally described [3] The structure of NH 4Th 2(PO 4)3 is similar to their alkaline analogues MThermal synthesis and structural characterization of the orthorhombic

  • Phosphorous Acid and Urea: Valuable Sources of Phosphorus and

    Thermal synthesis and structural characterization of the orthorhombic Th2(PO4)(P3O10) Valuable Sources of Phosphorus and Nitrogen in the Hydrothermal Synthesis of AmmoniumThorium Phosphates ChemInform 2008, 39 (46) DOI: 101002/chin Partners 1155 Sixteenth Street NW Washington, DC 年12月1日· The thorium phosphates, until recently scarcely investigated, have become of considerable interest because of their attractive properties as crystalline matrices for the immobilization of minor actinides coming from the spent fuel reprocessing [23], [24], [25], [26], [27], [28], [29]Synthesis, Raman and Rietveld analysis of thorium diphosphate

  • Chemistry of tetravalent actinide phosphates—Part I

    2004年12月1日· The phosphates of two actinides, ie, of thorium and uranium (IV) as well as of such tetravalent cations like Sn 4+, Ti 4+ or Zr 4+ were synthesized in the end of the 19th century However, the real interest in this subject began since the 1950s and the literature in this field is very rich2004年10月4日· This paper describes the synthesis of some thorium phosphate compounds with different Th/P ratio (1/2, 2/3 and 3/4) by a spray pyrolysis technique The soprepared rough compounds were annealed at different temperatures for 2 h and then analyzed by mainly Xray diffraction on powder and infrared spectroscopyEvery roughSynthesis and characterization of thorium phosphate phases by

  • Thermal synthesis and structural characterization of the orthorhombic

    orthorhombic Th 2(PO 4)(P 3O10) Jorge GARCIAGLEZ 1, Belén F ALFONSO 1, José A HUIDOBRO 1, we reported the synthesis of the first ammoniumthorium phosphates, (NH 4)2Th(PO 4)2·H 2O and NH 4Th 2(PO 4)3, which were structurally described [3] The structure of NH 4Th 2(PO 4)3 is similar to their alkaline analogues MThermal synthesis and structural characterization of the orthorhombic Th2(PO4)(P3O10) Valuable Sources of Phosphorus and Nitrogen in the Hydrothermal Synthesis of AmmoniumThorium Phosphates ChemInform 2008, 39 (46) DOI: 101002/chin Partners 1155 Sixteenth Street NW Washington, DC 20036Phosphorous Acid and Urea: Valuable Sources of Phosphorus and

  • Thermal synthesis and structural characterization of the orthorhombic

    2014年11月1日· Polycrystalline thorium (IV) phosphatetriphosphate, Th2 (PO4) (P3O10) (1), was obtained by (NH4) (2)Th (PO4) (2)center dot H2O (2) heating from room temperature to 1,273 K 1 crystallizes in2001年6月1日· In order to identify this phase, two other thorium phosphates: thorium phosphate–hydrogenphosphate (TPHP), Th2 (PO4)2HPO4·H2O, and thorium hydroxide phosphate (THOP), Th (OH)PO4, wereHydrothermal Synthesis and Characterization of the Thorium

  • Synthesis, Raman and Rietveld analysis of thorium diphosphate

    2008年12月1日· The thorium phosphates, until recently scarcely investigated, have become of considerable interest because of their attractive properties as crystalline matrices for the immobilization of minor actinides coming from the spent fuel reprocessing [23], [24], [25], [26], [27], [28], [29]2004年12月1日· The phosphates of two actinides, ie, of thorium and uranium (IV) as well as of such tetravalent cations like Sn 4+, Ti 4+ or Zr 4+ were synthesized in the end of the 19th century However, the real interest in this subject began since the 1950s and the literature in this field is very richChemistry of tetravalent actinide phosphates—Part I

  • Synthesis and characterization of thorium phosphate phases by

    2004年10月4日· Moreover, in 1996, Dacheux and coworkers [7a] reviewed in detail the chemistry of thorium phosphates and have concluded that the thorium orthophosphate, Th 3 (PO 4) 3, does not exist and, what is called Th 3 (PO 4) 3, in old papers [9], is in fact TPD In this article, we would like also to clarify the situationMicrocrystals of (NH4)2Ce(PO4)2·H2O were hydrothermally obtained from a CeO2−CO(NH2)2−H3PO4−H2O system (T = 180 °C) The structure [orthorhombic, Imma, a = 68940(9), b = 68860(9), c = 17723(2) Å] consists of CeO8 distorted dodecahedra and PO4 tetrahedra joined together to form a threedimensional framework with small fourCrystal Structure of a Cerium(IV) Bis(phosphate) Derivative

  • Studies on the Chemistry of Uranium and Thorium Phosphates Thorium

    Abstract Studies on phosphates of tetravalent uranium and thorium published by the authors in the 1990s are briefly overviewed Methods of synthesis, properties, and structures of new phosphates of these elements are described The chemical formulas of a number of already known uranium, thorium, and neptunium phosphates are critically analyzed

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