Cyclic polyamines as templates for novel complex topologies in uranyl sulfates and selenates

2018 ◽  
Vol 233 (3-4) ◽  
pp. 233-245 ◽  
Author(s):  
Vladislav V. Gurzhiy ◽  
Olga S. Tyumentseva ◽  
Sergey V. Krivovichev ◽  
Ivan G. Tananaev
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Complexity Measures ◽  
Topological Approach ◽  
Isothermal Evaporation ◽  
Novel Complex ◽  
Chemical Conditions

AbstractSingle crystals of two novel uranyl sulfates and two novel uranyl selenates with protonated cyclen and 3-aminotropane molecules, ((C8H24N4)[(UO2)3(SO4)5](H2O)3(I), (C8H24N4)(H5O2)(H3O)[(UO2)4(SeO4)7(H2O)](H2O)6.6(II), (C8H18N2)(H5O2)(H3O)[(UO2)3(SO4)5(H2O)](H2O)0.5(III), and (C8H18N2)(H5O2)(H3O)[(UO2)3(SeO4)5(H2O)](H2O)2(IV) have been prepared by isothermal evaporation from aqueous solutions and structurally characterized. Uranyl-containing 2D units have been investigated using topological approach and information-based complexity measures demonstrating that complex topologies form more rare than their simplest counterparts, which is a response of the crystal structure to changes of chemical conditions within the system.

scholarly journals Growth and Characterization of Epsomite Single Crystals Doped with KCl from low Temperature Aqueous Solutions

1970 ◽  
Vol 33 (1) ◽  
pp. 47-54 ◽  
Author(s):  
S Ferdous ◽  
J Podder
Keyword(s):  
Aqueous Solutions ◽  
Single Crystals ◽  
Optical Quality ◽  
Dielectric Studies ◽  
Slow Cooling ◽  
Large Size ◽  
Isothermal Evaporation ◽  
Academy Of Sciences

Highly transparent and well faceted large size epsomite single crystals have been grown in pure form and doped with KCl from aqueous solutions by slow cooling and isothermal evaporation method. The optical quality of the epsomite improves on doping by KCl. Mass growth rates were found to increase with doping of lower concentrations of KCl and then decreases with the higher concentration of KCl. KCl doped epsomite crystal reveals that structures are slightly distorted due to adsorption of Cl- ion into the crystal lattice. DC conductivity along the growth axis for all of the grown crystals increases with temperature in the range of 25 to 70ºC and also increases with the KCl concentration. Dielectric constant is found to be almost independent of frequency up to range of 106Hz. The dielectric studies show the suitability of these grown crystals for optoelectronic applications. DOI: 10.3329/jbas.v33i1.2949 Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 47-54, 2009

Thermal expansion, elastic and thermoelastic properties including crystal structure analyses of K-, Rb- and Cs-nitrilotriacetates

2004 ◽  
Vol 219 (10) ◽  
Author(s):  
Eiken Haussühl ◽  
Siegfried Haussühl ◽  
Ekkehart Tillmanns
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Optical Quality ◽  
Thermoelastic Properties ◽  
X Ray

AbstractSingle crystals of the title compounds having optical quality and dimensions up to 60 mm have been grown from aqueous solutions. X-ray crystal structure analyses of K

Crystal structure, thermal expansion and elastic properties of triclinic betaine hydrogen dihydrogen triiodate, ((CH3)3NCH2COOH)H2(IO3)3

1996 ◽  
Vol 211 (12) ◽  
Author(s):  
S. Haussühl ◽  
J. Schreuer
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Elastic Properties ◽  
Structure Analysis ◽  
Optical Quality ◽  
Space Group ◽  
X Ray

AbstractLarge single crystals of optical quality of betaine hydrogen dihydrogen iodate have been grown from aqueous solutions. An X-ray structure analysis yields space group

Crystal structure, thermal expansion and dielectric properties of monoclinic ethylenediammonium bis(hydrogensuccinate), H3N(CH2)2NH3(HC4H4O4)2

1994 ◽  
Vol 209 (1) ◽  
Author(s):  
J. Schreuer ◽  
T. Münch
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Dielectric Properties ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Structure Analysis ◽  
Optical Quality ◽  
Space Group ◽  
X Ray

AbstractLarge single crystals of optical quality of monoclinic ethylenediammonium bis(hydrogensuccinate) were grown from aqueous solutions. An X-ray structure analysis yielded space group

Crystal structure, thermal expansion and elastic properties of triclinic betaine hydrogen ammonium sulfate, ((CH3)3NCH2COOH)NH4SO4

1996 ◽  
Vol 211 (2) ◽  
Author(s):  
S. Haussühl ◽  
J. Schreuer
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Ammonium Sulfate ◽  
Elastic Properties ◽  
Structure Analysis ◽  
Optical Quality ◽  
X Ray

AbstractLarge single crystals of optical quality of betaine hydrogen ammonium sulfate have been grown from aqueous solutions. An X-ray structure analysis yielded space group

Crystal structures of hydrates of simple inorganic salts. II. Water-rich calcium bromide and iodide hydrates: CaBr2·9H2O, CaI2·8H2O, CaI2·7H2O and CaI2·6.5H2O

2014 ◽  
Vol 70 (9) ◽  
pp. 876-881 ◽  
Author(s):  
Erik Hennings ◽  
Horst Schmidt ◽  
Wolfgang Voigt
Keyword(s):  
Crystal Structure ◽  
Phase Diagram ◽  
Liquid Phase ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Crystal Structures ◽  
Room Temperature ◽  
Inorganic Salts ◽  
Solid Liquid

Single crystals of calcium bromide enneahydrate, CaBr2·9H2O, calcium iodide octahydrate, CaI2·8H2O, calcium iodide heptahydrate, CaI2·7H2O, and calcium iodide 6.5-hydrate, CaI2·6.5H2O, were grown from their aqueous solutions at and below room temperature according to the solid–liquid phase diagram. The crystal structure of CaI2·6.5H2O was redetermined. All four structures are built up from distorted Ca(H2O)8antiprisms. The antiprisms of the iodide hydrate structures are connected eitherviatrigonal-plane-sharing or edge-sharing, forming dimeric units. The antiprisms in calcium bromide enneahydrate are monomeric.

Syntheses, single-crystal structure determination, and Raman spectra of Rb[C(CN)3] and Cs[C(CN)3]

2015 ◽  
Vol 70 (2) ◽  
pp. 151-154 ◽  
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Raman Spectra ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Space Group ◽  
Cell Parameters ◽  
Ethanol Yields

AbstractExtracting residues of an aqueous solutions containing equimolar amounts of K[C(CN)3] and RbF or CsF, respectively, with absolute ethanol, yields triangular, transparent colorless crystals of Rb[C(CN)3] and Cs[C(CN)3] after the ethanol was allowed to evaporate. The compounds are isotypic and crystallize isopointal to calcite in space group R3̅c (no. 167) with the cell parameters a=809.9(1) and c=1461.3(3) pm and a=843.29(9) and c=1459.9(2) pm, respectively. Single crystals were used to record the Raman spectra of the title compounds.

Crystal structure, elastic properties and phase transition of triclinic ammonium hydrogen succinate, NH4HC4H4O4

1993 ◽  
Vol 206 (2) ◽  
Author(s):  
S. Haussühl ◽  
J. Schreuer
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Elastic Properties ◽  
Structure Analysis ◽  
Optical Quality ◽  
Space Group ◽  
X Ray ◽  
Ammonium Hydrogen

AbstractLarge optical quality, single crystals of triclinic ammonium hydrogen succinate have been grown from aqueous solutions. An X-ray structure analysis yields space group

scholarly journals Redetermination of the crystal structure of K2Hg(SCN)4

2017 ◽  
Vol 73 (7) ◽  
pp. 1073-1075
Author(s):  
Jascha Bandemehr ◽  
Matthias Conrad ◽  
Florian Kraus
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Rotation Axis ◽  
Potassium Thiocyanate ◽  
Structure Model ◽  
Distorted Tetrahedron ◽  
X Ray Diffraction ◽  
X Ray

Single crystals of K2Hg(SCN)4[dipotassium tetrathiocyanatomercurate(II)] were grown from aqueous solutions of potassium thiocyanate and mercury(II) thiocyanate and studied by single-crystal X-ray diffraction. In comparison with the previously reported structure model [Zvonkova (1952).Zh. Fiz. Khim.26, 1798–1803], all atoms in the crystal structure were located, with lattice parameters and fractional coordinates determined to a much higher precision. In the (crystal) structure, the HgIIatom is located on a twofold rotation axis and is coordinated in the form of a distorted tetrahedron by four S atoms of the thiocyanate anions. The K+cation shows a coordination number of eight.

Study of potential oscillations during reaction of an aluminium single crystal with an aqueous KOH solution

1990 ◽  
Vol 55 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Ivan Halaša ◽  
Milica Miadoková
Keyword(s):  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Periodic Potential ◽  
Optimum Conditions ◽  
Potential Oscillations ◽  
Dilute Aqueous Solutions ◽  
Experimental Findings ◽  
Kinetics Of

The authors investigated periodic potential changes measured on oriented sections of Al single crystals during spontaneous dissolution in dilute aqueous solutions of KOH, with the aim to find optimum conditions for the formation of potential oscillations. It was found that this phenomenon is related with the kinetics of the reaction investigated, whose rate also changed periodically. The mechanism of the oscillations is discussed in view of the experimental findings.

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