Grigory Andreev

Russian Academy of Sciences | RAS

Interaction of U(VI) and Np(VI) with quinaldic acid in the presence of various inorganic (nitrate, chloride, bromide, perrhenate, selenate, sulfate) or organic (dipicolinic acid) counter-ions allowed obtaining a series of complexes where quinaldic acid presents in the zwitterionic form. In all compounds, except one complex, quinaldic acid acts as a...

Neptunium(V) complexes with N‐donor lipophilic extractants, 2,2′:6′,2′′‐terpyridine (Terpy), 2,4,6‐tri‐2‐pyridyl‐1,3,5‐triazine (TPTZ), and 6,6’‐bis(5,6‐diethyl‐1,2,4‐triazin‐3‐yl)‐2,2’bipyridine (C2‐BTBP), have been synthesized and characterized by X‐ray crystallography as well as vis‐NIR and IR spectroscopy. The structures display coordination of...

The inclusion of monopyridinecarboxylic acids into the structures of uranyl halides results in the formation of unexpected structural units. Molecules of picolinic and nicotinic acids acting as bridging ligands favor the formation of unprecedented dinuclear units in two uranyl bromide complexes, which comprise two metal centers in different, tetrag...

New uranyl coordination polymers have been synthesized in the presence of organic cations using phthalic acid as a linker. X-ray analysis of single crystals has shown that compounds with protonated imidazole, and 2-methylimidazole exhibit 2D layered structures. The complex (HIm)2[(UO2)3{C6H4(COO)2}4]·2H2O contains two crystallographically unique ur...

A series of new dimethyl-sulfoxide-containing pertechnetates and perrhenates of tetravalent U, Np, and Pu were synthesized and structurally characterized by the X-ray diffractometry. In all the synthesized compounds, the actinide atoms were coordinated by eight DMSO molecules with or without an extra XO4- anion in the coordination sphere. This resu...

New complexes of U(VI) with p-methoxybenzoic acid were synthesized and their crystal structure was determined. Three uranyl-based structural units were found, simple 1:3 complex anion, dimeric two-nuclear complex, and infinite coordination polymer. Two of the obtained compounds contains by two different structural units simultaneously. One of the c...

Behavior of UVI, NpVI and PuVI in water‐acetonitrile solutions was studied spectrophotometrically with the successive addition of the polar organic ligands (dimethyl sulfoxide or hexamethylphosphoric triamide) and the NCS– ion. The detected spectral effects – changes in the absorption intensity, bathochromic shifts in the absorption bands, the abse...

A new U(VI) complex with methanesulfonic acid was obtained [UO 2 (OH)(CH 3 SO 3 )]. Its crystal structure was determined using X-ray single crystal diffractometry. The compound crystallizes in P2 1 /n space group. Main crystallographic data: a = 8.6825(6) Å, b = 8.0551(6) Å, c = 8.9298(7) Å, β = 102.162(1)˚, V = 610.52(8) Å ³ , Z = 4. Compound has...

Americium citrate, (NH4)2{Co(NH3)6}2[Am3(Citr)4(OH)(H2O)2]·nH2O, was synthesized and characterized using X-ray crystallography, IR and optical spectroscopy. Americium atoms are coordinated by citrate anions acting as tetradentate ligands. All carboxylic and hydroxylic groups of citric acid are deprotonated. By this means, complex anions [Am3(Citr)4...

A series of new pertechnetate, perrhenate, and perchlorate compounds of hexavalent U, Np, and Pu containing isonicotinic acid were synthesized. Their crystal structures were determined by X-ray diffractometry. In all compounds, actinide atoms are found in pentagonal bipyramidal surroundings. They are coordinated by 2 to 4 isonicotinic acid molecule...

The new complexes [PuO2CrO4(urea)3] (1) and [PuO2CrO4(urea)2] (2) were isolated from aqueous solutions. Their composition and structure were determined by single crystal X-ray diffraction analysis. Compound 1 has a chain structure, with each Pu atom coordinated by the O atoms of three urea molecules and two bidentate chromate ions. In the structure...

New U(VI) o-methoxybenzoate compounds of the compositions ImH[UO2(C8H7O3)3]·H2O and 1-MeImH[UO2(C8H7O3)3]·H2O (Im is imidazole, 1-MeIm is 1-methylimidazole) were synthesized. Their structure was determined by single crystal X-ray diffraction and confirmed by visible and IR spectroscopy. The compounds are isostructural and consist of [UO2(C8H7O3)3]−...

Nitrogen-bearing ligands have received a lot of attention focused primarily on liquid-liquid extraction and separation of lanthanides and actinides. To modelise the complexation mechanism and to understand more deeply the electronic and thermodynamic properties of complexes formed in solution, compound structural data are needed. The present work d...

A new U(VI) compound with m-hydroxybenzoic acid, HIm[(UO2)(C7H5O3)3]·2H2O, was prepared. Its structure was determined by X-ray diffraction analysis and confirmed by the visible and IR spectra. The coordination number of the U atom is 8, with the hydroxyl O atom not involved in coordination with the metal ion. The main structural constituents of the...

Uranium(VI) complex with silicoundecatungstate, K7H6[K(UO2)(H2O)(α-SiW11O39)2]·21H2O, has been obtained and its structure has been determined using X-ray single crystal diffractometry and confirmed by electron and IR absorption spectroscopy. The stability of An(VI) complexes with monolacunary heteropolyanions in solution is discussed from the struc...

A series of isostructural oxalates of Th, U, Np, and Pu have been synthesized. The crystal structure of {C(NH(2))(3)}(4)[An(C(2)O(4))(4)]·2H(2)O comprises infinite [An(C(2)O(4))(4)](4n-) chains, guanidinium cations and water molecules. Each An atom is connected to five oxalate anions, two of which act as bridging tetradentate ligands, while the oth...

First mixed-ligand polyoxometalate complex of neptunium, K10.5H0.5[Np(BW11O39)(W5O18)]·15H2O, has been synthesized. Its structure has been determined using X-ray diffractometry and confirmed by electron and IR absorption spectroscopy. The structure consists of [Np(BW11O39)(W5O18)]11− anions, potassium cations and water molecules. The overall symmet...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A new complex compound of U(VI) with m-hydroxybenzoic acid, K[(UO2)(C7H5O3)3]·5H2O, was prepared and characterized. A single crystal X-ray diffraction study showed that the coordination polyhedron of the U atom is a hexagonal bipyramid whose equatorial plane is formed by the O atoms of carboxy groups of three anions of m-hydroxybenzoic acid. The K...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Mixed valence U(VI)/U(IV) compound with organic anionic ligand bridging uranium atoms in different oxidation states was synthesized at room temperature. Coordination polyhedron of U(VI) atom is a pentagonal bipyramide whose equatorial positions are occupied by nitrogen and two oxygen atoms of one DPA2− anion, oxygen atom of another DPA2− anion and...

The reaction of NpO2(CH3SO3) with methylimidazole results in the formation of novel Np(V) complex with cation–cation interaction, [NpO2(MeIm)(CH3SO3)(H2O)]. The crystal structure is confirmed by IR and UV–vis spectroscopic data.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

This study concerns the formation of complexes with actinides at oxidation state +IV, from Th to Am, through a lacunary heteropolyanion ligand P(2)W(17)O(61)(10-). The preparation of original single crystals of complexes with 1:2 stoichiometry provided structural data through single-crystal X-ray diffraction for the entire An(IV) series. An(IV) ato...

Nanomaterials are increasingly used for commercial purposes owing to their specific physicochemical properties. At the same time, the associated potential risks still remain to be elucidated. In this context, the biocompatibility and toxicity of new nanomaterials were discussed.

Complexation of methanesulfonic acid with Np(IV), Np(V), and U(VI) ions in aqueous solutions was studied. New crystalline compounds HImid[Np(C2O4)(CH3SO3)3(H2O)2] (I), [NpO2(Terpy)(CH3SO3)·(H2O)]·2H2O (II), and [UO2(CH3SO3)2(H2O)] (III) were isolated. The absorption spectra of all the compounds in the IR, visible, and UV ranges were examined. The r...

The first complex of a transuranium element (tetravalent plutonium) with nucleotide (deoxycytidinemonophosphate, dCMP) was synthesized and structurally characterized. The crystal structure of [Pu(4)(NO(3))(8)(HdCMP)(4)(H(2)O)(8)](NO(3))(4).2H(2)O consists of complex cations [Pu(4)(NO(3))(8)(HdCMP)(4)(H(2)O)(8)](4+), NO(3)(-) anions, and water molec...

New Np(V) complexes with imidazole, [NpO(2)(CH(3)COO)(Im)(2)(H(2)O)], [(NpO(2))(2)(C(2)O(4))(Im)(6)] x 5 Im x H(2)O, and [NpO(2)(NO(2))(Im)(4)], were synthesized. Their crystal structures were determined using X-ray single-crystal diffractometry. The crystal structures are confirmed by IR and UV-vis spectroscopic data. In all three complexes, neptu...

As a result of Np(V) glycolate reaction with 2,2′-bipyridyl, the novel coordination polymer [NpO2(C2O3H3)(Bipy)]·2.5H2O was formed. The structure consists of infinite chains of [NpO2(C2O3H3)(Bipy)] and water molecules. The crystal structure is confirmed by IR and UV–vis spectroscopic data. This complex is the first example of An glycolate with neut...

The reaction of Np(V) methanesulfonate solution with imidazole led to the in situ formation of oxalic acid and the reduction of Np(V) to Np(IV). As a result, the novel organically templated organic polymer, (ImidazoleH)[Np(C2O4)(CH3SO3)3(H2O)2], was formed. The structure consists of infinite chains of [Np(C2O4)(CH3SO3)3(H2O)2]− and imidazolium cati...

The first nitrite complex of actinide metal, {C(NH 2)3}2[NpO 2(NO 2)(Pic)2], was synthesized, and its crystal structure was determined using X-ray diffractometry and confirmed by NIR and IR spectroscopies. Main crystallographic data: space group P1, triclinic, a = 8.9329(1) A, b = 11.6669(2) A, c = 11.6698(2) A, alpha = 68.080(1) degrees, beta = 88...

This chapter discusses the ligands that are widely diversified: certain of them can only serve as monodentate, bidentate, or terdentate; others being the polyfunctional ligands with different donor sites may coordiate to the metal in various modes. In the latter case, the formation of chelate metallo-rings and/or the linking of the adjacent An coor...

The monoclinic (space group P2(1)/c) title compound, [UO2(CH3O3S)(2)(H2O)](n), is a polymorphic modification of the known orthorhombic ( space group Pbcn) variant of this stoichiometry [Wilson (1978). Acta Cryst. B34, 2302 - 2303]. The crystal structure consists of infinite [UO2(CH3SO3)(2)(H2O)] chains along the a axis. The coordination polyhedron...

The monoclinic (space group P21/c) title compound, [UO2(CH3O3S)2(H2O)]n, is a polymorphic modification of the known orthorhombic (space group Pbcn) variant of this stoichiometry [Wilson (1978). Acta Cryst. B34, 2302–2303]. The crystal structure consists of infinite [UO2(CH3SO3)2(H2O)] chains along the a axis. The coordination polyhedron of the U at...

Actinide elements and their chemistry have a significant number of applications. Bringing together contributions from the leading experts in the field, Recent Advances in Actinide Science covers six main topics: * Analysis, the environment and biotransformations * Coordination and organometallic chemistry * Heavy elements * Nuclear fuels, materials...

Actinide elements and their chemistry have a significant number of applications. Bringing together contributions from the leading experts in the field, Recent Advances in Actinide Science covers six main topics: * Analysis, the environment and biotransformations * Coordination and organometallic chemistry * Heavy elements * Nuclear fuels, materials...

The interaction of Np(V) with all isomers of pyridinemonocarboxylic acid has been investigated, stability constants have been calculated using NIR spectroscopy. Single crystals of [NpO2(Pic)(H2O)(2)] (1), Cs[NpO2(PiC)(2)(HPic)](.)3H(2)O (2), [NpO2(Nic)(H2O)] (3), and [NpO2(iso-Nic)(H2O)] (4) have been synthesized. Compound I contains infinite chain...

A new neptunium(V) complex [(NpO2)2(CH3COO)2(H2O)] ⋅ 2H2O was synthesized and its crystal structure was determined. The unit cell parameters are: a = 24.007(10) Å, b = 6.779(3) Å, c = 8.076(3) Å, space group Pnma, Z = 4, V = 1314.2(9) Å3, R = 0.049, wR(F 2) = 0.105. The crystal structure of the compound is composed of neutral [(NpO2)2(CH3COO)2(H2O)...

A new neptunium(VI) complex [(NpO2)(CrO4)(H2O)] ⋅ 4H2O (I) was synthesized, its crystal structure was determined, and the IR and near-IR absorption spectra were measured. The unit cell parameters are: a = 8.634(4) Å, b = 11.119(4) Å, c = 9.410(3) Å, β = 92.40(3)°, space group P21/c, Z = 4, V = 902.6(6) Å3, R = 0.048, wR(F 2) = 0.054. The crystal st...

Synthesis and properties of Np(V) compounds formed with nitrogen planar ligand Tptz. Under special conditions, Np(V) compounds are formed with N-donor aromatic ligands. In this work, synthesis as well as optical properties and thermal stability of solids [NpO2Cl(Tptz)H2O]·H2O (I) and NpO2Br(Tptz)·n H2O (II) are investigated. To cite this article: N...

A new neptunium(VI) complex [(NpO2)(CrO4)(H2O)] ⋅ 4H2O (I) was synthesized, its crystal structure was determined, and the IR and near-IR absorption spectra were measured. The unit cell parameters are: a = 8.634(4) Å, b = 11.119(4) Å, c = 9.410(3) Å, β = 92.40(3)°, space group P21/c, Z = 4, V = 902.6(6) Å3, R = 0.048, wR(F 2) = 0.054. The crystal st...

New Np(VI) and Pu(VI) pyrazine-2-carboxylates isostructural with the uranyl complex [UO2 · (C4H3N2COO)2(H2O)] · 2H2O were synthesized from aqueous solutions. The unit cell parameters of [NpO2 · (C4H3N2COO)2(H2O)] · 2H2O and [PuO2(C4H3N2COO)2(H2O)] · 2H2O were calculated from the powder X-ray patterns. The thermal behavior of the complexes suggests...

A complex of uranyl perchlorate with imidazolidine-2-one as the molecular ligand, [UO2(Imon)4(H2O)](ClO4)2 (I), was synthesized and structurally characterized by X-ray diffraction analysis. The coordination number of the uranium atom is 7. The nearest environment of the uranyl ion includes four O atoms of the imidazolidine-2-one molecules and one O...

A new complex of Np(V) [NpO2(HCOO){OC(NH2)2}3] (I) was synthesized and its crystal structure was determined: a = 6.674(1) , b = 13.164(2) , c = 7.020(1) , = 101.35(1), space group P21, Z = 2, V = 604.7(2) 3, R = 0.048, wR(F 2) = 0.128. The structure consists of infinite chains of [NpO2(HCOO){OC(NH2)2}3]. The coordination polyhedron of the Np atom i...

A new Np(V) complex [(NpO2)(NO3)(DMAA)2(H2O)] was synthesized and its crystal structure was determined. Its absorption spectra were recorded in IR and near-IR regions. The unit cell parameters are a = 9.389(3) Å, b = 8.075(3) Å, c = 20.956(7) Å, β = 92.53(3)°, space group P21/c, Z = 4, V = 1585.8(9) Å3, R = 0.054, wR(F 2) = 0.170. The coordination...

New neptunium(VI) complex {H3NCH2CH(NH3)CH3}[(NpO2)2(CrO4)3(H2O)] 3H2O is synthesized; its crystal structure is determined and IR and near-IR absorption spectra are recorded. The crystallographic data are: a = 10.805(2) , b = 11.238(2) , c = 17.615(8) , space group P212121, Z = 4, V = 2139(1) 3, R = 0.051, wR(F 2) = 0.109. The crystal structure of...

K[(NpO2)(SiO3OH)]·H2O (I) and K[(PuO2)(SiO3OH)]·H2O (II) were prepared by hydrothermal synthesis at 120°C, and their IR and near-IR spectra were measured. The unit cell parameters of the compounds were determined from powder X-ray patterns [a = 7.068(1), b = 7.064(2), c = 6.640(1) Å. β = 106.68(1)°, V = 317.6 Å3 (I); a = 7.102(1), b = 7.100(2), c =...

A new Np(IV) complex, [N(CH3)4]4[Np(NCS)8], was prepared. Its crystal structure was determined, and the absorption spectra in the IR and near IR ranges were measured. Crystal data: a = 27.280(6), b = 12.288(3), c = 13.493(3) Å, space group Pna21, Z = 4, V = 4523(2) A3, R = 0.044, wR(F 2) = 0.091. The crystal structure of the compound consists of [N...

Neptunium(V) perrhenate complex [(NpO2)(ReO4)(Phen)(H2O)2] was synthesized with 1,10-phenanthroline as a ligand. Its composition and structure were determined by X-ray diffraction analysis. The coordination polyhedron of the Np atom is a pentagonal bipyramid. The nearest surrounding of the neptunoyl ion includes the oxygen atom of the ReO4 anion, t...

The composition and structure of a new complex of pentavalent neptunium [NpO2(N3)(Phen)(H2O)]2 · 3H2O are studied by X-ray diffraction analysis. The coordination polyhedron of the Np atom is a pentagonal bipyramid, and the nearest environment of each neptunoyl ion contains two nitrogen atoms of phenanthroline and the azide ion. The phenanthroline m...

X-ray diffraction and spectroscopic data for a new Np(V) compound, namely, [NpO2{OC(NH2)2}5](NO3) (I) are presented. Crystals are monoclinic, space group P21, a = 11.142(2) Å, b = 7.6379(9) Å, c = 11.143(2) Å, ß = 108.9(1)°, Z = 2, V = 897.1(2) Å3. The neptunium atom has a typical pentagonal-bipyramidal environment with five oxygen atoms of the car...

The composition and structure of a new complex of pentavalent neptunium [NpO2(N3)(Phen)(H2O)]2 · 3H2O are studied by X-ray diffraction analysis. The coordination polyhedron of the Np atom is a pentagonal bipyramid, and the nearest environment of each neptunoyl ion contains two nitrogen atoms of phenanthroline and the azide ion. The phenanthroline m...

The crystal structure of the [NpO2(NO3)(Terpy)(H2O)] complex between pentavalent neptunium and 2,2′,6′,2″-terpyridine is determined. The crystal data are as follows: a = 11.130(3) Å, b = 7.916(2) Å, c = 18.324(5) Å, β = 100.873(6), V = 1585.5(8) Å3, Z = 4, space group is P21/n, R = 0.044, and wR(F 2) = 0.092. The coordination polyhedron of the Np a...

New neptunium(VI) complex {H3NCH2CH(NH3)CH3}[(NpO2)2(CrO4)3(H2O)] · 3H2O is synthesized; its crystal structure is determined and IR and near-IR absorption spectra are recorded. The crystallographic data are: a = 10.805(2) Å, b = 11.238(2) Å, c = 17.615(8) Å, space group P212121, Z = 4, V = 2139(1) Å3, R = 0.051, wR(F2) = 0.109. The crystal structur...

Crystalline compounds of trivalent Eu, Tb formed with Al(OH)6Mo6O183− and Cr(OH)6Mo6O183− anions were prepared from solutions containing lanthanide(III) and (NH4)3M(OH)6Mo6O18 (M=Al,Cr). Stoichiometric compounds containing both Eu and Gd were also prepared. The calculated mean value of hydration numbers of lanthanide ions, n=7.6±1.4, is consistent...

The crystal structure of (NpO2)(NO3)(CH3CONH2)2 was determined. The crystallographic data were are follows: a = 5.766(3) Å, b = 13.154(5) Å, c = 14.027(6) Å, V = 1064.0(8) Å3, space group Pnma, Z = 4, ρcalcd = 2.804 g/cm3, R = 0.046, R w = 0.102. The coordination polyhedron of Np is a pentagonal bipyramid whose equatorial positions are occupied by...

This paper is a continuation of our on-going program for studying the structure and properties of pentavalent neptunium compounds with organic ligands containing several electron-donating atoms. Previously, we studied the neptunium(V) complexes with anions of pyridinecarboxylic acids, polypyridines, and found that the Np ion coordinates the oxygen...

The structure of a new complex of samarium(III) with a hexamolybdoaluminate ion, Sm[Al(OH)6Mo6O18] · 11H2O, was established by the methods of X-ray diffraction analysis. The crystallographic data are as follows: sp. gr. Pbc21, a = 10.927(4) Å, b = 11.757(5) Å, c = 22.327(9) Å, V = 2868(1) Å3, Z = 4, ρ calcd = 3.040 g/cm3, R = 0.084, R W = 0.198. In...

The reactions of some rare-earth elements (La, Ce, Sm, Lu, Gd) and Am(III) with heteropolymolybdate anions are studied. The complexation rate constants of Am(III) in a solution with Al(OH)6Mo6O18 3- and Cr(OH)6MoO18 3- 6 (1 = 18 6 and 25 5, respectively) are determined by spectral methods. The Ln[Al(OH)6Mo6O18] nH2O, Eu[Cr(OH)6Mo6O18] nH2O, and Am[...

The crystal structure of (NpO_2)(NO_3)(CH_3CONH_2)_2 was determined. The crystallographic data were are follows: a = 5.766(3) Å, b = 13.154(5) Å, c = 14.027(6) Å, V = 1064.0(8) Å^3, space group Pnma, Z = 4, _calcd = 2.804 g/cm^3, R = 0.046, R_w = 0.102. The coordination polyhedron of Np is a pentagonal bipyramid whose equatorial positions are occu...

The new neptunium(V) complex [NpO2(bipy)(H2O)3](NO3) was synthesised, and its structure was determined by X-ray diffraction analysis and IR spectroscopy.

The diffusion of molecules through the fractal interface between two “transparent” media is considered. Such a surface possesses unique properties—its volume has a finite value. It is shown that the effective diffusion coefficient is equal to zero. This result does not depend on the properties of the media which are on the left or on the right of t...

We consider ideal gas diffusion through a fractal boundary between two homogeneous media. This boundary is modeled by a spatially self-similar system of folds of the interface surface between the media. This surface can have a finite volume, which is then identified with the physical volume of the boundary layer. We show that the effective diffusio...

The crystal structure of the hexavalent neptunium complex NpO2CrO4 · 2[OC(NH2)2] is determined. The crystal data are a = 7.192(2) Å, b = 12.902(4) Å, c = 11.226(3) Å, β = 92.19(2)°, V = 1040.9(4) Å3, space group P21/n, Z = 4, d calcd = 3.223 g/cm3, R = 0.045, and R w = 0.130. The coordination polyhedron of the Np atom is the pentagonal bipyramid wh...

In this paper, selected results of the structural and theoretical studies of different types of coordination compounds synthesized in the Laboratory of X-ray Structural Studies of the Nesmeyanov Institute of Organoelement Compounds (NIOC), Russian Academy of Sciences (Center for X-ray Structural Studies in the General and Technical Chemistry Divisi...

The crystal structure of the complex (NH4)2[UO2(MoO4)2] · H2O is determined. The unit cell parameters are a= 7.916, b= 10.885, c= 13.476 Å, ß = 98.40°, V= 1148.8 Å3, space group P21/c, Z= 4, ?(calcd) = 3.452 g/cm3, R= 0.0406, Rw= 0.0850. The coordination polyhedron of the uranium atom is a pentagonal bipyramid with its equatorial plane formed by ox...

The crystal structure of the complex [NpO2(C10H8N2)(NCS)(H2O)2] · H2O is determined. The unit cell parameters are a= 7.406, b= 9.517, c= 11.518 Å, a = 103.65°, ß = 92.68°, ? = 96.53°, V= 781.6 Å3, space group $$P\overline 1 $$ , Z= 2, ?(calcd) = 2.257 g/cm3, R= 0.046, Rw= 0.122. The coordination polyhedron of the Np atom is a pentagonal bipyramid...

The influence of experimental conditions on the compositions and yields of crystalline phases in the UO2MoO4-M2MoO4-H2O systems (M is an alkali-metal or ammonium cation) is studied. The compounds of the morphotropic series with the general formula M2UO2(MoO4)2·H2O, where M = K, Rb, Cs, or NH4, are synthesized hydrothermally from aqueous solution at...

The structure and luminescence characteristics of new lanthanide complexes with the heteropoly anion Al(OH)6Mo6O183– were examined.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

The crystal structure of the complex Rb2UO2(MoO4)2 · H2O is determined. The crystal data are the following: a = 7.967(3) Å, b= 10.956(4) Å, c = 13.679(5) Å, β= 96.69(3)°, V= 1185.7(8) Å3, space group P21/c, Z = 4, dcalcd = 4.363 g/cm3, R= 0.064, Rw = 0.147. The crystal structure is layered; water of crystallization is not involved in the coordinati...

The crystal structure of the (NpO2)(2)[2,6-(OOC)(2)C5H3N]. 5H(2)O complex has been determined. The crystallographic data are as follows: a = 11.710(5) Angstrom, b = 19.644(5) Angstrom, c = 7.929(5) Angstrom, beta = 118.26(2)degrees, V = 1606.9(9) Angstrom (3), space group C2/c, Z = 8, rho (calcd) = 3.244 g/cm(3), R = 0.044, and R-w = 0.094. The cry...

The crystal structure of the (NpO2)2[2,6-(OOC)2C5H3N] · 5H2O complex has been determined. The crystallographic data are as follows: a = 11.710(5) Å, b = 19.644(5) Å, c = 7.929(5) Å, β = 118.26(2)°, V = 1606.9(9) Å3, space group C2/c, Z = 8, ρ (calcd) = 3.244 g/cm3, R = 0.044, and RW = 0.094. The crystal structure consists of chains formed by the [2...

The localization of an external electromagnetic radiation in a structure of nonuniformities (folds) of the fractal interface of the solid Al-In/Ga liquid eutectic system is studied. The possibility of formation of a high concentration of photons localized in microcavities of the fractal system is predicted. The high photon concentration may cause a...