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1.
Roman Zaremba Ute Ch. Rodewald Rolf-Dieter Hoffmann Rainer P?ttgen 《Monatshefte für Chemie / Chemical Monthly》2008,103(1):481-487
The rare earth-transition metal-indides RE
4IrIn (RE = Gd–Er) and the solid solutions RE
4
TIn1–x
Mg
x
(RE = Y, Gd; T = Rh, Ir) were prepared by arc-melting of the elements and subsequent annealing. The rare earth sesquioxides were used as
oxygen source for the suboxides RE
4IrInO0.25 (RE = Gd, Er). Single crystals of the indides were grown via slowly cooling of the samples and they were investigated via X-ray powder diffraction and single crystal diffractometer data: Gd4RhIn type, F
[`4]\bar 4
3m, a = 1372.3(6) pm for Gd4IrIn, a = 1365.3(6) pm for Tb4IrIn, a = 1356.7(4) pm for Dy4IrIn, a = 1353.9(4) pm for Ho4IrIn, a = 1344.1(4) pm for Er4IrIn, a = 1370.3(5) pm for Y4RhIn0.54Mg0.46, a = 1375.6(5) pm for Gd4IrIn0.55Mg0.45, a = 1373.0(3) pm for Gd4IrInO0.25, and a = 1345.1(4) pm for Er4IrInO0.25. The rhodium and iridium atoms have a trigonal prismatic rare earth coordination. Condensation of the RhRE
6 and IrRE
6 prisms leads to three-dimensional networks which leave voids that are filled by regular In4 or mixed In4–x
Mg
x
tetrahedra. The indium (magnesium) atoms have twelve nearest neighbors (3In(Mg) + 9RE) in icosahedral coordination. The rare earth atoms build up a three-dimensional, adamantane-like network of condensed, edge
and face-sharing octahedra. For Gd4IrInO0.25 and Er4IrInO0.25 the RE16 octahedra are filled with oxygen. The crystal chemical peculiarities of these rare earth rich compounds are discussed. 相似文献
2.
Phases of variable composition K1−x
A1−x
R1+x
(MoO4)3) (0 ≤ x ≤ 0.2–0.6), where A = Ni, Mg, Co, or Mn and R = Yb, Lu, or Sc, which crystallize in a NASICON-type structure (space group
R
c) were synthesized by solid-phase reactions. Their crystal parameters were calculated, and IR and Raman spectra described.
Original Russian Text ? N.M. Kozhevnikova, T.N. Khamaganova, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol.
53, No. 5, pp. 864–865. 相似文献
3.
The (p, ρ, T, x) properties for binary mixtures of CO2 (volume fraction purity 0.99999) and isobutane (mole fraction purity 0.99988) {x1 CO2 + x2 isobutane (x1 = 0.2482, 0.4718, and 0.7506)} were measured in the compressed liquid phase using a metal-bellows variable volumometer. Measurements were conducted from T = (280 to 440) K and (3 to 200) MPa. The expanded uncertainties (k = 2) were estimated to be: temperature, <3 mK; pressure, 1.5 kPa (p ? 7 MPa), 0.06% (7 MPa < p ? 50 MPa), 0.1% (50 MPa < p ? 150 MPa), 0.2% (p > 150 MPa); density, 0.10%; and composition, 4.4 · 10−4. At >100 MPa and T = (280 or 440) K, the uncertainties in the density measurements increased to 0.14% and 0.22%, respectively. The data are compared with the available equation of state. The excess molar volumes, , of the mixtures were calculated and plotted as a function of temperature and pressure. 相似文献
4.
T. N. Khamaganova 《Russian Journal of Inorganic Chemistry》2008,53(4):499-502
Phases of a variable composition in the Ba3−x
Sr
x
Y(BO3)3, system (0 < x < 3) have been investigated for the first time using the solid-phase reactions method. The formation of two series of solid
solutions crystallizing in different structural types have been established using X-ray diffraction (D-8 Advance diffractometer,
CuK
α radiation, graphite monochromator). Crystal characteristics of obtained phases have been determined.
Original Russian Text ? T.N. Khamaganova, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol. 53, No. 4, pp. 553–556. 相似文献
5.
E. A. Shusharina P. E. Plyusnin S. P. Khranenko S. A. Gromilov 《Journal of Structural Chemistry》2011,52(1):125-132
Complex salts [Ir(NH3)5Cl]x[Rh(NH3)5Cl]1−x
MO4 (x = 0.5, 1; M = Mo, W) are synthesized and their thermal properties are studied. The crystal structures are determined for
[Ir(NH3)5Cl]WO4 and [Ir(NH3)5Cl]MoO4. In the structures, the ions are linked by N-H...O hydrogen bonds, the shortest ones being 2.868(2)–3.422(2) ?. and 2.860(4)–3.434(3)
?. respectively. The thermal properties of the complex salts are studied in the hydrogen atmosphere and in hydrogen-helium
mixtures. It is demonstrated that the final products are the mixtures of nanocrystalline powders of Ir and binary or ternary
solid solutions with the hcp lattice. 相似文献
6.
N. N. Pestereva A. Yu. Zhukova A. Ya. Neiman 《Russian Journal of Electrochemistry》2007,43(11):1305-1313
Transport numbers of oxygen ions,
, in methacomposites (1 − x)MeWO4 · xWO3, where Me = Sr and Ba and x = 0−0.55, are determined in the temperature interval 600 to 900°C by a method of the emf of an oxygen-air galvanic cell.
It is demonstrated that the region of small contents of the additive (x ≤ 0.2) is predominantly characterized by oxygen-ion conduction (
= 1), which gives way to electronic conduction (t
e = 1) at x > 0.35. It is confirmed once again that subeutectic compositions (1 − x)MeWO4 · xWO3 where Me = Sr and Ba and x = 0−0.2 belong in the class of ion-conducting methacomposites. The threshold of percolation of electronic conduction (t
e ≥ 0.5,
< 0.5) occurs at x
t ≥ 0.3. Dependences of the transport numbers of the oxygen ions on the volume ratio between components in both composites
resemble one another; specifically, the threshold composition contains nearly 20 vol % of WO3. The dramatic amplification (by 1–1.5 orders of magnitude) of the ionic conductivity in the methacomposites occurs at small
contents of tungstic oxide (x ≤ 0.01). A chemical transport removal of excess tungstic oxide, which is segregated in the form of the surface compound MeW-s,
from the surface of the MeWO4 grains destroys MeW-s, leading to a 10–15-fold drop of the ionic conductance. At x ≥ 0.05, the oxygen-ion conductance in the methacomposites is practically independent of their composition. A model for the
formation and architecture of the methacomposites is qualitatively modified. The modified model takes into account doubled
surface activity and mobility of the MeW-s phase with respect to MeWO4 and WO3.
Original Russian Text ? N.N. Pestereva, A.Yu. Zhukova, A. Ya. Neiman, 2007, published in Elektrokhimiya, 2007, Vol. 43, No.
11, pp. 1379–1386. 相似文献
7.
A. I. Gubanov N. V. Kuratieva E. Yu. Filatov S. V. Korenev 《Journal of Structural Chemistry》2012,53(3):503-508
The structures of two salts [Co(NH3)6][Rh(NO2)6] (I) and [Co(NH3)6][(NO2)3Rh(μ-NO2)1+x (μ-OH)2−x Rh(NO2)3]·(2−x)(H2O), x = 0.17 (II) are solved. Single crystals of the salts are obtained by the counter diffusion method through the gel of aqueous solutions of [Co(NH3)6]Cl3 and Na3[Rh(NO2)6]. The structure of [Co(NH3)6][Rh(NO2)6] is consistent with the diffraction data for a polycrystalline sample of poorly soluble fine salt formed in the exchange reaction between aqueous solutions of [Co(NH3)6]Cl3 and Na3[Rh(NO2)6]. The structure of [Co(NH3)6][(NO2)3Rh(μ-NO2)1+x (μ-OH)2−x Rh(NO2)3]·(2−x)(H2O), x = 0.17 exhibits the stabilizing effect of a large cation in the formation of novel, unknown previously coordination ions: [(NO2)3Rh(μ-NO2)(μ-OH)2Rh(NO2)3]3− and [(NO2)3Rh(μ-NO2)2(μ-OH)Rh(NO2)3]3−. 相似文献
8.
T. N. Khamaganova 《Russian Journal of Applied Chemistry》2008,81(7):1290-1292
The possibility of preparing two series of solid solutions in the system Ba3 − x
Sr
x
Er(BO3)3 (0 ≤ x ≤ 3.0), crystallizing in different structural types, was examined. Samples of the phases of variable composition were synthesized
by the method of solid-phase reactions, and their X-ray phase analysis was done. The X-ray diffraction characteristics of
the phases synthesized were determined.
Original Russian Text ? T.N. Khamaganova, 2008, published in Zhurnal Prikladnoi Khimii, 2008, Vol. 81, No. 7, pp. 1210–1212. 相似文献
9.
E. V. Chubarova D. G. Samsonenko H. G. Platas F. M. Dolgushin A. V. Gerasimenko M. N. Sokolov Z. A. Starikova M. Yu. Antipin V. P. Fedin 《Journal of Structural Chemistry》2004,45(6):1004-1013
Compounds of trigonal cluster chloroaqua complexes with cucurbit[8]uril were synthesized by slowly evaporating HCl solutions of chalcogenides heterometallic cubane cluster complexes of molybdenum and tungsten with cucurbit[8]uril in air; the complexes were characterized by X-ray diffraction analysis: (H3O)8[Mo3S4(H2O)2.5Cl6.5]2Cl(PdCl4)·(C48H48N32O16)· 29H2O (a = 13.3183(17) Å, b = 13.7104(18) Å, c = 18.225(3) Å; α = 80.263(3)°, β = 77. 958(3)°, γ = 87.149(4)°, V = 3207.4(7) Å3, space group P
, Z = 1, ρ(calc) = 1.900 g/cm3), (H3O)4 [Mo3S4(H2O)3Cl6]2·(C48H48N32O16)3·68H2O (a = 21.413(6) Å, c = 49.832(10) Å; γ = 120°, V = 19788(8) Å3, space group R
, Z = 3, ρ(calc) = 1.695 g/cm3), (H3O)6 [Mo3S4(H2O)3Cl6]2Cl2·(C48H48N32O16)·12H2O (a = 15.881(2) Å, b = 17.191(2) Å, c = 23.276(4) Å; β = 98.865(15)°, V = 6278.7(15) Å3, space group P21/c, Z = 2, ρ(calc) = 1.638 g/cm3), [W3S4(H2O)5Cl4]2·(C48H48N32O16)3·35H2O (a = 21.038(3) Å; α = 61.20(1)°, V = 6762.0(14) Å3, space group R
, Z = 1, ρ(calc) = 1.582 g/cm3). The [Mo3S4(H2O)3Cl6]2− anion complex was isolated as three geometrical isomers.Original Russian Text Copyright © 2004 by E. V. Chubarova, D. G. Samsonenko, H. G. Platas, F. M. Dolgushin, A. V. Gerasimenko, M. N. Sokolov, Z. A. Starikova, M. Yu. Antipin, and V. P. Fedin__________Translated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 6, pp. 1049–1058, November–December, 2004. 相似文献
10.
Hong Tang Xiao-Dong Guo Ben-He Zhong Heng Liu Yan Tang Rui Xu Long-Yan Li 《Journal of Solid State Electrochemistry》2012,16(4):1537-1543
Hybrid materials xLiFePO4·(1 − x)Li3V2(PO4)3 were synthesized by sol–gel method, with phenolic resin as carbon source and chelating agent, methylglycol as surfactant.
The crystal structure, morphology and electrochemical performance of the prepared samples were investigated by X-ray diffraction
(XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge–discharge test and particle size
analysis. The results show that LiFePO4 and Li3V2(PO4)3 co-exist in hybrid materials, but react in single phase. Compared with individual LiFePO4 and Li3V2(PO4)3 samples, hybrid materials have smaller particle size and more uniform grain distribution. This structure can facilitate Li
ions extraction and insertion, which greatly improves the electrochemical properties. The sample 0.7LiFePO4·0.3Li3V2(PO4)3 retains the advantages of LiFePO4 and Li3V2(PO4)3, obtaining an initial discharge capacity of 166 mA h/g at 0.1 C rate and 109 mA h/g at 20 C rate, with a capacity retention
rate of 73.3% and an excellent cycle stability. 相似文献
11.
A. I. Klyndyuk E. A. Chizhova V. M. Kononovich 《Russian Journal of Inorganic Chemistry》2008,53(10):1561-1565
We study the effect of Y3+ ↔ Ba2+ and Cu2+ ↔ Fe3+ substitutions on the structure, thermal expansion, electrical conductivity, and thermal e.m.f. of layered ferrocuprate YBaCuFeO5 + δ · YBa(Cu1−x
Fe
x
)2O5 + δ solid solutions with 0.45≤x≤0.55 are formed. The unit cell parameters, thermal expansivity, and oxygen nonstoichiometry index of the YBaCuFeO5 +δ phase (δ) are almost independent of variations in the cationic composition of this phase. The electrical conductivity of
layered yttrium barium ferrocuprate increases, whereas the activation energy of conductivity decreases in response to Ba2+ → Y3+ and Cu2+ → Fe3+ substitutions (with increasing copper(III) proportion in samples). The thermal e.m.f. of ceramics decreases when composition
deviates from the cationic stoichiometry (YBaCuFeO5 +δ).
Original Russian Text ? A.I. Klyndyuk, E.A. Chizhova, V.M. Kononovich, 2008, published in Zhurnal Neorganicheskoi Khimii,
2008, Vol. 53, No. 10, pp. 1672–1676. 相似文献
12.
I. Yu. Kotova D. A. Belov S. Yu. Stefanovich 《Russian Journal of Inorganic Chemistry》2011,56(8):1189-1193
Ag1 − x
Mg1 − x
R1 + x
(MoO4)3 NASICON-like solid solutions, where R = Al or Sc and 0 ≤ x ≤ 0.5, were prepared; their crystal lattice parameters and thermal stabilities were determined. Silver-ion conductivity was
measured, and conductivity activation energy values were calculated for various temperature ranges. Above 400°C, Ag1 − x
Mg1 − x
R1 + x
(MoO4)3 phases have ionic conductivities comparable to the conductivities of sodium-ion and lithium-ion NASICON-like conductors.
The conductivity increases as the tervalent cation radius increases or the amount of mobile silver ions increases. 相似文献
13.
V. N. Viter 《Russian Journal of Applied Chemistry》2009,82(12):2093-2097
Substitutional solid solutions (Cu1−y
Zn
y
)2(OH)PO4·xH2O (0 ≤ y ⩽ 0.26, x = 0.1−0.2), (Cu1−y
Co
y
)2(OH)PO4·xH2O (0 ≤ y ≤ 0.10, x = 0.1−0.2), and (Cu1−y
Ni
y
)2(OH)PO4·xH2O (0 ≤ y ≤ 0.08, x = 0.1−0.2) were synthesized. The unit cell parameters of the resulting phosphates were determined, and their IR absorption
spectra were measured. The reactants were H3PO4 and mixtures of hydrous carbonates of the appropriate metals. Thermolysis
of the solid solutions was examined with (Cu1−y
Co
y
)2(OH)PO4·xH2O (0 ≤ y ≤ 0.10, x = 0.1−0.2) as an example. 相似文献
14.
A. Yu. Mollaev I. K. Kamilov R. K. Arslanov L. A. Saipulaeva R. G. Dzhamamedov S. F. Marenkin A. N. Babushkin 《Russian Journal of Inorganic Chemistry》2009,54(1):121-124
The electrical resistivity and Hall factor in n-CdAs2, p-ZnAs2, and n-Cd
x
Zn1 − x
As2 were measured at hydrostatic pressures up to 9 GPa and quasi-hydrostatic pressures up to 50 GPa at room temperature. For
n-CdAs2, a phase transition was discovered at p = 5.5 GPa; for p-ZnAs2, two phase transitions were discovered: one at P = 10–15 GPa and the other at p = 35–40 GPa. No anomalies were found on ρ(p) and R(p) curves for Cd
x
Zn1 − x
As2 when p ≤ 9 GPa.
Original Russian Text ? A.Yu. Mollaev, I.K. Kamilov, R.K. Arslanov, L.A. Saipulaeva, R.G. Dzhamamedov, S.F. Marenkin, A.N.
Babushkin, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 1, pp. 122–125. 相似文献
15.
16.
D. V. Safronov I. A. Stenina A. V. Maksimychev S. L. Shestakov A. B. Yaroslavtsev 《Russian Journal of Inorganic Chemistry》2009,54(11):1697-1703
NASICON materials of composition Li1 + x
Zr2 − x
In
x
(PO4)3(x = 0–1) were synthesized. The phase constitution, particle size, and conductivity of these materials were studied as s function
of synthesis temperature. High-temperature X-ray powder diffraction was used to study phase transitions in the materials synthesized.
Low levels (x ≤ 0.1) partial substitution of indium for zirconium considerably increase the lithium ion conductivity and reduce the activation
energy for conduction compared to the parent compound. 相似文献
17.
N. M. Kozhevnikova 《Russian Journal of Applied Chemistry》2010,83(3):384-389
The synthesis conditions for variable-composition phase Na1−x
Co1−x
Fe1+x
(MoO4)3, 0 ≤ x ≤ 0.4, crystallizing in the nasicon structure type (R
$
\bar 3
$
\bar 3
c) were examined. For this phase, the crystallographic parameters were calculated, vibrational spectra were interpreted, and
temperature dependence of electrical conductivity, dielectric constant, and dielectric loss tangent were examined. 相似文献
18.
Ulrike Pfannenschmidt Ute Ch. Rodewald Rainer P?ttgen 《Monatshefte für Chemie / Chemical Monthly》2011,41(2):219-224
Abstract
The rhodium-rich phosphides RERh6P4 (RE = Sc, Yb, Lu) were synthesized from the constituent elements in bismuth fluxes and their structures were refined from X-ray single-crystal diffractometer data: P3, a = 6.968(2), c = 3.666(2) ?, wR (F 2) = 0.0481, 895 F 2 for ScRh6P4; a = 6.971(1), c = 3.673(1) ?, wR (F 2) = 0.0614, 700 F 2 for YbRh6P4; a = 6.971(2), c = 3.682(1) ?, wR (F 2) = 0.0828, 722 F 2 for LuRh6P4 with 37 variables per refinement. All three crystals are twinned. The twinning and the structural relationship with the aristotype LiCo6P4, space group P[`6]m2P\bar 6m2 are discussed on the basis of a group–subgroup scheme. The RERh6P4 phosphides belong to the large number of metal-rich compounds with a metal-to-phosphorus ratio near 2:1. The isolated phosphorus atoms have trigonal prismatic metal coordination by RE and Rh atoms. The high rhodium content leads to a pronounced rhodium substructure (278–293 pm Rh–Rh in ScRh6P4). From a geometrical point of view, the RERh6P4 structures can be viewed as intergrowth variants of slightly distorted ThCr2Si2-related slabs as realized for KRh2P2. 相似文献19.
20.
V. D. Zhuravlev V. G. Zubkov A. P. Tyutyunnik Yu. A. Velikodnyi N. D. Koryakin 《Russian Journal of Inorganic Chemistry》2009,54(1):134-136
The phase compositions of theLaVO4-SrMoO4(1) and Sr2GeO4-SrMoO4 (2) binary systems, which bound the Sr2GeO4-LaVO4-SrMoO4 (3) ternary system, and the LaSr2(VO4)(GeO4)-Sr2GeO4+SrMoO4 section (4) of system 3 are studied at subsolidus temperatures. Systems 1 and 2 consist of a mixture of the initial compounds,
and the La1 − x
Sr2 + x
(GeO4)(V1 − x
Mo
x
O4) (where 0 ≤ x ≤ 0.4) region of substitutional solid solutions with a palmierite structure is formed in system 3. The unit cell parameters
of the solid solutions are determined. The distribution of the lanthanum and strontium cations over two positions of the cationic
sublattice is described.
Original Russian Text ? V.D. Zhuravlev, V.G. Zubkov, A.P. Tyutyunnik, Yu.A. Velikodnyi, N.D. Koryakin, 2009, published in
Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 1, pp. 135–137. 相似文献