Reaction of uranyl nitrate with carboxylic diacids under hydrothermal conditions. Crystal structure of complexes with l(+)-tartaric and oxalic acids

Polyhedron ◽  
2007 ◽  
Vol 26 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Pierre Thuéry
Keyword(s):  
Crystal Structure ◽  
Uranyl Nitrate ◽  
Hydrothermal Conditions ◽  
Oxalic Acids

scholarly journals An investigation of polyhedral deformation in two mixed-metal diarsenates: SrZnAs2O7and BaCuAs2O7

2015 ◽  
Vol 71 (4) ◽  
pp. 330-337 ◽  
Author(s):  
Sabina Kovač ◽  
Ljiljana Karanović ◽  
Tamara Đorđević
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
General Formula ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Open Framework ◽  
Geometrical Characteristics ◽  
Barium Copper

Two isostructural diarsenates, SrZnAs2O7(strontium zinc diarsenate), (I), and BaCuAs2O7[barium copper(II) diarsenate], (II), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction. The three-dimensional open-framework crystal structure consists of corner-sharingM2O5(M2 = Zn or Cu) square pyramids and diarsenate (As2O7) groups. Each As2O7group shares its five corners with five differentM2O5square pyramids. The resulting framework delimits two types of tunnels aligned parallel to the [010] and [100] directions where the large divalent nine-coordinatedM1 (M1 = Sr or Ba) cations are located. The geometrical characteristics of theM1O9,M2O5and As2O7groups of known isostructural diarsenates, adopting the general formulaM1IIM2IIAs2O7(M1II= Sr, Ba, Pb;M2II= Mg, Co, Cu, Zn) and crystallizing in the space groupP21/n, are presented and discussed.

A 2-D Zn(II) coordination polymer based on 4,5-imidazoledicarboxylate and bis(benzimidazole) ligands: synthesis, crystal structure and fluorescence properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Xinzhao Xia ◽  
Lixian Xia ◽  
Geng Zhang ◽  
Yuxuan Jiang ◽  
Fugang Sun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Zigzag Chain ◽  
Supramolecular Framework ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Hydrogen Bond Interaction ◽  
X Ray ◽  
New Type ◽  
Solid State Fluorescence

Abstract In this work, a new type of zinc(II) coordination polymer {[Zn(HIDC)(BBM)0.5]·H2O} n (Zn-CP) was synthesized using 4,5-imidazoledicarboxylic acid (H3IDC) and 2,2-(1,4-butanediyl)bis-1,3-benzimidazole (BBM) under hydrothermal conditions. Its structure has been characterized by infrared spectroscopy, elemental analysis and single crystal X-ray diffraction analysis. The Zn(II) ion is linked by the HIDC2− ligand to form a zigzag chain by chelating and bridging, and then linked by BBM to form a layered network structure. Adjacent layers are further connected by hydrogen bond interaction to form a 3-D supramolecular framework. The solid-state fluorescence performance of Zn-CP shows that compared with free H3IDC ligand, its fluorescence intensity is significantly enhanced.

Luminescence Intensity Enhancement of Copper Doped Hydronium Alunite Synthesized under Hydrothermal Conditions Using Sulfates Solution

2014 ◽  
Vol 90 ◽  
pp. 127-132
Author(s):  
Yuichiro Kuroki ◽  
Takashi Hatsuse ◽  
Tomoichiro Okamoto ◽  
Masasuke Takata
Keyword(s):  
Crystal Structure ◽  
Luminescence Intensity ◽  
Single Phase ◽  
Elemental Sulfur ◽  
Nitrate Solution ◽  
Hydrothermal Condition ◽  
Copper Nitrate ◽  
Hydrothermal Conditions ◽  
Photoluminescence Peak ◽  
Blue Photoluminescence

A novel phosphor, copper doped hydronium alunite ((H3O)Al3(SO4)2(OH)6:Cu), exhibiting a blue photoluminescence peak at a wavelength of 420 nm was successfully synthesized from aluminum and copper sulfates solution under hydrothermal condition (240 °C, 60 min). The measurement of XRD revealed that the obtained products were single phase with a crystal structure of (H3O)Al3(SO4)2(OH)6. Luminescence intensity of (H3O)Al3(SO4)2(OH)6:Cu synthesized from sulfates solution was 6.2 times higher than that from an aluminum nitrate solution mixed with an elemental sulfur and a copper nitrate solution. The increase of luminescence intensity was resulted from an improvement of the crystallinity of (H3O)Al3(SO4)2(OH)6.

scholarly journals Synthesis and crystal structure of a new polymorph of potassium europium(III) bis(sulfate) monohydrate, KEu(SO4)2·H2O

2018 ◽  
Vol 74 (2) ◽  
pp. 242-245 ◽  
Author(s):  
Avijit Kumar Paul
Keyword(s):  
Crystal Structure ◽  
Topological Analysis ◽  
Structural Connectivity ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Monoclinic Space Group ◽  
Hydrothermal Conditions ◽  
Metal Sulfate ◽  
Synthesis And Crystal Structure ◽  
Trigonal Prismatic

The mixed-metal sulfate, KEu(SO4)2·H2O, has been obtained as a new polymorph using hydrothermal conditions. The crystal structure is isotypic with NaCe(SO4)2·H2O and shows a three-dimensional connectivity of the tetrahedral sulfate units with EuIII and KI ions. Tricapped trigonal–prismatic EuO9 units and square-antiprismatic KO8 units link the SO4 tetrahedra, building the three-dimensional structure. Topological analysis reveals the existence of two nodes with 6- and 10-connected nets. The compound was previously reported [Kazmierczak & Höppe (2010). J. Solid State Chem. 183, 2087–2094] in the monoclinic space group P21/c with a similar structural connectivity and coordination environments to the present compound.

scholarly journals A new form of NaMnAsO4

2019 ◽  
Vol 75 (7) ◽  
pp. 969-971
Author(s):  
Matthias Weil ◽  
Théo Veyer
Keyword(s):  
Crystal Structure ◽  
Manganese Oxide ◽  
Trigonal Bipyramid ◽  
Framework Structure ◽  
Hydrothermal Conditions ◽  
Coordination Numbers ◽  
Distorted Octahedral Coordination ◽  
Sodium Cations ◽  
Distorted Octahedral ◽  
New Form

A new form of NaMnAsO4, sodium manganese(II) orthoarsenate, has been obtained under hydrothermal conditions, and is referred to as the β-polymorph. In contrast to the previously reported orthorhombic α-polymorph that crystallizes in the olivine-type of structure and has one manganese(II) cation in a distorted octahedral coordination, the current β-polymorph contains two manganese(II) cations in [5]-coordination, intermediate between a square-pyramid and a trigonal bipyramid. In the crystal structure of β-NaMnAsO4, four [MnO5] polyhedra are linked through vertex- and edge-sharing into finite {Mn4O16} units strung into rows parallel to [100]. These units are linked through two distinct orthoarsenate groups into a framework structure with channels propagating parallel to the manganese oxide rows. Both unique sodium cations are situated inside the channels and exhibit coordination numbers of six and seven. β-NaMnAsO4 is isotypic with one form of NaCoPO4 and with NaCuAsO4.

A first Mn member in the struvite morphotropic series, CsMn(H2O)6(PO4): hydrothermal synthesis, crystal structure and interconnections within the family of related phosphates

2018 ◽  
Vol 74 (8) ◽  
pp. 936-943
Author(s):  
Galina V. Kiriukhina ◽  
Olga V. Yakubovich ◽  
Ekaterina M. Kochetkova ◽  
Olga V. Dimitrova ◽  
Anatoliy S. Volkov
Keyword(s):  
Crystal Structure ◽  
Ionic Radius ◽  
The Novel ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Cell Parameters ◽  
Structural Relationships ◽  
The Family

Caesium manganese hexahydrate phosphate, CsMn(H2O)6(PO4), was synthesized under hydrothermal conditions. Its crystal structure was determined from single-crystal X-ray diffraction data. The novel phase crystallizes in the hexagonal space group P63 mc and represents the first manganese member in the struvite morphotropic series, AM(H2O)6(TO4). Its crystal structure is built from Mn(H2O)6 octahedra and PO4 tetrahedra linked into a framework via hydrogen bonding. The large Cs atoms are encapsulated in the framework cuboctahedral cavities. It is shown that the size of the A + ionic radius within the morphotropic series AM(H2O)6(XO4) results is certain types of crystal structures and affects the values of the unit-cell parameters. Structural relationships with Na(H2O)Mg(H2O)6(PO4) and the mineral hazenite, KNa(H2O)2Mg2(H2O)12(PO4)2, are discussed.

A mononuclear cobalt(III) 3-(2-pyridyl)-5-phenyl-1,2,4-triazolato complex: hydrothermal synthesis, crystal structure, thermostability, and DFT calculations

2015 ◽  
Vol 70 (9) ◽  
pp. 631-636 ◽  
Author(s):  
Huaixian Liu ◽  
Lin Sun ◽  
Huiliang Zhou ◽  
Peipei Cen ◽  
Xiaoyong Jin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Density Functional ◽  
Free Ligand ◽  
Supramolecular Network ◽  
Stacking Interactions ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Functional Theory ◽  
X Ray ◽  
Mononuclear Cobalt

AbstractStarting with 1H-3-phenyl-5-(pyridin-2-yl)-1,2,4-triazole (1-Hppt), a Co(III) complex, [Co(ppt)3] (1), has been synthesized by reaction with CoF3 under hydrothermal conditions and characterized by its infrared spectrum and elemental analysis. The structure was determined by single-crystal and powder X-ray diffraction. Density functional theory (DFT) was employed to determine the optimized geometry and preferred conformation of the free ligand. A supramolecular network is formed via π–π stacking interactions. The conformation and geometry of the ligands correspond with the calculated results.

Oligomere Tetraeder-Anionen in Borophosphaten: Sechserringe mit offenen und cyclischen Phosphat-Verzweigungen in der Kristallstruktur von K6Cu2[B4P8O28(OH)6] / Oligomeric Tetrahedral Anions in Borophosphates: Six-Membered Rings with Open and Cyclic Phosphate Branchings in the Crystal Structure of K6Cu2[B4P8O28(OH)6]

1998 ◽  
Vol 53 (12) ◽  
pp. 1440-1444 ◽  
Author(s):  
Insan Boy ◽  
Gerhard Cordier ◽  
Rüdiger Kniep
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Conditions ◽  
Tetragonal Pyramidal ◽  
Cyclic Phosphate

Abstract Crystals of K6Cu2[B4PhO28(OH)6] were grown under hydrothermal conditions at 160 °C. The crystal structure (monochnic, P21/c (Nr. 14), a = 961.8(1), b = 1755.0(1), c = 942.0(1) pm, β = 112.29(1)°, Z = 2) contains oligomeric tetrahedral anions based on six-membered rings {B4P2O10O8/2} with additional branchings by hydrogenphosphate-groups (open branching: 4 x HPO3O1/2; cyclic branching: 2 x HPO2O2/2). The complex borophosphate anion is represented by the formula [B4P8O28(OH)6]10-. Cu2+ is in a tetragonal pyramidal and K+ in an irregular coordination by eight and nine oxygen ligands, respectively.

Synthesis and characterization of the lead borate Pb6B12O21(OH)6

2016 ◽  
Vol 71 (8) ◽  
pp. 925-933 ◽  
Author(s):  
Sandra Schönegger ◽  
Teresa S. Ortner ◽  
Klaus Wurst ◽  
Gunter Heymann ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Potassium Nitrate ◽  
Lattice Parameters ◽  
Synthesis And Characterization ◽  
Lead Borate ◽  
Hydrothermal Conditions ◽  
Organic Reagents ◽  
Synthesis Conditions

AbstractA lead borate with the composition Pb6B12O21(OH)6 was synthesized through a hydrothermal synthesis, using lead metaborate in combination with sodium nitrate and potassium nitrate. The compound crystallizes in the trigonal, non-centrosymmetric space group P32 (no. 145) with the lattice parameters a = 1176.0(4), c = 1333.0(4) pm, and V = 0.1596(2) nm3. Interestingly, the data of Pb6B12O21(OH)6 correct the structure of a literature known lead borate with the composition “Pb6B11O18(OH)9”. For the latter compound, nearly identical lattice parameters of a = 1176.91(7) and c = 1333.62(12) pm were reported, possessing a crystal structure, in which the localization and refinement of one boron atom was obviously overlooked. The structure of Pb6B12O21(OH)6 is built up from trigonal planar BO3 and tetrahedral BO4 groups forming complex chains. The Pb2+ cations are located between neighboring polyborate chains. The here reported compound Pb6B12O21(OH)6 and “Pb6B11O18(OH)9” were, however, produced under different synthesis conditions. While “Pb6B11O18(OH)9” was synthesized via a hydrothermal synthesis including ethylenediamine and acetic acid, the here reported lead borate Pb6B12O21(OH)6 could be obtained under moderate hydrothermal conditions (240°C) without the addition of organic reagents.

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