Solid Solutions RE16Rh11–xZx (RE = La, Ce, Pr, Nd, Sm; Z = Ga, Zn, Cd, In, Sn, Sb, Pb, Bi) – Centrosymmetric n = 2 Variants of Parthé’s Homologous Series A5n+6B3n+5

2012 ◽  
Vol 67 (6) ◽  
pp. 594-604 ◽  
Author(s):  
Frank Tappe ◽  
Falko M. Schappacher ◽  
Thorsten Langer ◽  
Inga Schellenberg ◽  
Rainer Pöttgen
Keyword(s):  
Single Crystal ◽  
Solid Solutions ◽  
Homologous Series ◽  
High Frequency ◽  
Structural Motif ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Subgroup Scheme ◽  
A Chain

Several samples of solid solutions RE16Rh11-xZx (RE = La, Ce, Pr, Nd, Sm; Z = Ga, Zn, Cd,In, Sn, Sb, Pb, Bi) were synthesized by high-frequency melting of the elements in sealed tantalum ampoules. The samples were characterized by powder X-ray diffraction, and the structures of eight compounds were refined on the basis of single-crystal X-ray diffractometer data. The compounds crystallize with a centrosymmetric variant (space group P4⁄mbm) of the Ca16Sb11 type (P4̄ 21m). The relation between both structure types is discussed on the basis of a group-subgroup scheme. Only for La16Rh8Sn3 we observed full rhodium-tin ordering. The striking structural motif is a chain of face-sharing square prisms (filled with tin) and anti-prisms (filled with rhodium). The La16Rh8Sn3 structure is closely related to the structure types W5Si3, Ca16Sb11, Y3Rh2, Sm26Co11Ga6, Pu31Pt20, and Yb36Sn23 and is the centrosymmetric n = 2 member of Parthé’s A5n+6B3n+5 series. 119Sn Mössbauer spectra resolved the two crystallographically independent tin sites of La16Rh8Sn3, while a Pr16Rh9Sb2 sample shows only a singlet in its 121Sb Mössbauer spectrum.

A Chain-like Polyoxotungstate Constructed from [CeW10O36]9–, [Na5(H2O)17Cl]4+, and [Na2(H2O)8]2+ Units: (NH4)3[Na5(H2O)17Cl]{[Na(H2O)4]2[CeW10O36]}· 6 H2O

2007 ◽  
Vol 62 (12) ◽  
pp. 1471-1475 ◽  
Author(s):  
Ling Yuan ◽  
Chao Qin ◽  
Xinlong Wang ◽  
Enbo Wang
Keyword(s):  
Hydrogen Bonding ◽  
Single Crystal ◽  
Supramolecular Network ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Linear Chains ◽  
A Chain

An unusual cerium-containing decaoxotungstate complex, (NH4)3[Na5(H2O)17Cl]{[Na(H2O)4]2- [CeW10O36]} · 6H2O (1) has been synthesized and characterized by IR, TG, and single crystal X-ray diffraction studies (yellow crystals, orthorhombic, space group Imm2, a = 11.473(2), b = 15.225(3), c = 17.646(7) Å, V = 3082.3(15) °A3, Z = 2, R = 0.046). In this compound, sandwichtype [CeW10O36]9− clusters are linked by binuclear [Na2(H2O)8]2+ units by sharing oxygen atoms into linear chains, which are further extended into a 2D supramolecular network via pentanuclear [Na5(H2O)17Cl]4+ units by strong hydrogen bonding interactions.

Dinuclear Gold(I) Chloride Complexes of 1,4-Bis(diphenylphosphinyl)butane and 1,5-Bis(diphenylphosphinyl)pentane: A Conformational Study

1992 ◽  
Vol 47 (12) ◽  
pp. 1711-1716 ◽  
Author(s):  
H. Schmidbaur ◽  
P. Bissinger ◽  
J. Lachmann ◽  
O. Steigelmann
Keyword(s):  
Single Crystal ◽  
Crystal Lattice ◽  
Conformational Study ◽  
X Ray Diffraction ◽  
Chloride Complexes ◽  
Space Group ◽  
X Ray ◽  
Solvent Molecules ◽  
A Chain ◽  
Efficient Packing

[1,4-Bis(diphenylphosphinyl)butane]digold dichloride 1 and [1,5-bis(diphenylphosphinyl)-pentane]digold dichloride 2 have been prepared from R2SAuCl (R = CH2CH2OH) and the corresponding bidentate phosphines Ph2P(CH2)nPPh2 (n = 4 or 5) in good yields. The structures of the compounds have been determined by single crystal X-ray diffraction (1 · CH2C12: space group P1̅, Z = 2; 2·0.5 CH2Cl2: space group C 2/c, Z = 8). While the monomers [Ph2P(CH2)5PPh2] (AuCl)2 are associated through intermolecular Au···Au contacts (3.323 Å) to form a chain-like structure, the crystal lattice of 1· CH2Cl2 features independent [Ph2P(CH2)4PPh2](AuCl)2 molecules which show no intra- or intermolecular Au···Au interactions. This exceptional behaviour can be rationalized on the basis of efficient packing of solvent molecules and molecules 1 with a particularly favourable conformation, which cannot be altered by weak Au(d10)—Au(d10) interactions.

A Co(II) complex from a pyridylamide ligand: synthesis and structural characterization

2018 ◽  
Vol 73 (3-4) ◽  
pp. 265-268
Author(s):  
Xiao-Hong Zhu ◽  
Ding-Yun Jiang ◽  
Tao Hu ◽  
Deng-Hao Li
Keyword(s):  
Thermogravimetric Analysis ◽  
Single Crystal ◽  
Structural Characterization ◽  
Hydrothermal Reaction ◽  
Chain Structure ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
A Chain

Abstract The hydrothermal reaction of N3,N5-di(pyridin-4-yl)pyridine-3,5-dicarboxamide (L) with Co(NO3)2·6H2O and ErCl3·6H2O yields a new complex, {[Co(L)2(NO3)1.15(Cl)0.85]·4DMF}n (1). Complex 1 has been characterized by single-crystal and powder X-ray diffraction, IR, and elemental and thermogravimetric analysis. It crystallizes in the orthorhombic space group Fddd and shows a chain structure.

Gold-Tin Ordering in SrAu2Sn2

2014 ◽  
Vol 69 (7) ◽  
pp. 767-774 ◽  
Author(s):  
Christian Schwickert ◽  
Birgit Gerke ◽  
Rainer Pöttgen
Keyword(s):  
Single Crystal ◽  
Coordination Number ◽  
Solid Solutions ◽  
High Frequency ◽  
Spectroscopic Data ◽  
Type Structure ◽  
Temperature Dependent ◽  
Space Group ◽  
X Ray ◽  
Structure Space

Samples of the solid solutions SrAuxSn4−x (1:7 ≤ x ≤ 2:2) were obtained by high-frequency melting of the elements in sealed niobium ampoules. Powder and single-crystal X-ray data confirmed the CaBe2Ge2-type structure, space group P4/nmm. The structures of SrAu1.76Sn2.24, SrAu2Sn2, SrAu2.16Sn1.84 (crystal A), SrAu2.16Sn1.84 (crystal B), and SrAu2.22Sn1.78 were refined from singlecrystal diffractometer data. Only the SrAu2Sn2 crystal shows complete Au-Sn ordering while all other crystals show substantial mixed occupancies on the four crystallographically independent sites of the polyanionic networks in which the strontium atoms fill cages of coordination number 16. Temperature-dependent susceptibility measurements have revealed diamagnetism for SrAu2Sn2. 119Sn Mössbauer spectroscopic data of a bulk SrAu2Sn2 sample have resolved the tetrahedral and square-pyramidal tin sites but point to substantial Au-Sn disorder.

scholarly journals The Role of Acidity in the Synthesis of Novel Uranyl Selenate and Selenite Compounds and their Structures

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 965
Author(s):  
Gabriel L. Murphy ◽  
Philip Kegler ◽  
Eike M. Langer ◽  
Evgeny V. Alekseev
Keyword(s):  
Single Crystal ◽  
The Novel ◽  
Orthorhombic Structure ◽  
Slow Evaporation ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Triclinic Structure ◽  
A Chain

Herein, the novel uranyl selenate and selenite compounds Rb2[(UO2)2(SeO4)3], Rb2[(UO2)3(SeO3)2O2], Rb2[UO2(SeO4)2(H2O)]·2H2O, and (UO2)2(HSeO3)2(H2SeO3)2Se2O5 have been synthesized using either slow evaporation or hydrothermal methods under acidic conditions and their structures were refined using single crystal X-ray diffraction. Rb2[(UO2)2(SeO4)3] synthesized hydrothermally adopts a layered 2D tetragonal structure in space group P42/ncm with a = 9.8312(4) Å, c = 15.4924(9) Å, and V = 1497.38(15) Å, where it consists of UO7 polyhedra coordinated via SeO4 units to create units UO2(SeO4)58− moieties which interlink to create layers in which Rb+ cations reside in the interspace. Rb2[(UO2)3(SeO3)2O2] synthesized hydrothermally adopts a layered 2D triclinic structure in space group P1¯ with a = 7.0116(6) Å, b = 7.0646(6) Å, c = 8.1793(7) Å, α = 103.318(7)°, β = 105.968(7)°, γ = 100.642(7)° and V = 365.48(6) Å3, where it consists of edge sharing UO7, UO8 and SeO3 polyhedra that form [(UO2)3(SeO3)2O2] layers in which Rb+ cations are found in the interlayer space. Rb2[UO2(SeO4)2(H2O)]·2H2O synthesized hydrothermally adopts a chain 1D orthorhombic structure in space group Pmn21 with a = 13.041(3) Å, b = 8.579(2) Å, c = 11.583(2) Å, and V = 1295.9(5) Å3, consisting of UO7 polyhedra that corner share with one H2O and four SeO42− ligands, creating infinite chains. (UO2)2(HSeO3)2(H2SeO3)2Se2O5 synthesized under slow evaporation conditions adopts a 0D orthorhombic structure in space group Cmc21 with a = 28.4752(12) Å, b = 6.3410(3) Å, c = 10.8575(6) Å, and V = 1960.45(16) Å3, consisting of discrete rings of [(UO2)2(HSeO3)2(H2SeO3)2Se2O5]2. (UO2)2(HSeO3)2(H2SeO3)2Se2O5 is apparently only the second example of a uranyl diselenite compound to be reported. A combination of single crystal X-ray diffraction and bond valance sums calculations are used to characterise all samples obtained in this investigation. The structures uncovered in this investigation are discussed together with the broader family of uranyl selenates and selenites, particularly in the context of the role acidity plays during synthesis in coercing specific structure, functional group, and topology formations.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

Single-crystal investigation of Ce5AgxGe4−x (x = 0.1−1.08) with Sm5Ge4 type

2020 ◽  
Vol 75 (8) ◽  
pp. 765-768
Author(s):  
Bohdana Belan ◽  
Dorota Kowalska ◽  
Mariya Dzevenko ◽  
Mykola Manyako ◽  
Roman Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Binary Compound ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

AbstractThe crystal structure of the phase Ce5AgxGe4−x (x = 0.1−1.08) has been determined using single-crystal X-ray diffraction data for Ce5Ag0.1Ge3.9. This phase is isotypic with Sm5Ge4: space group Pnma (No. 62), Pearson code oP36, Z = 4, a = 7.9632(2), b = 15.2693(5), c = 8.0803(2) Å; R1 = 0.0261, wR2 = 0.0460, 1428 F2 values and 48 variables. The two crystallographic positions 8d and 4c show Ge/Ag mixing, leading to a slight increase in the lattice parameters as compared to those of the pure binary compound Ce5Ge4.

The wulfenite—stolzite series: centric or acentric structures?

2008 ◽  
Vol 72 (4) ◽  
pp. 987-990 ◽  
Author(s):  
L. Secco ◽  
F. Nestola ◽  
A. Dal Negro
Keyword(s):  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
End Members ◽  
Symmetry Change

AbstractThree natural crystals of the wulfenite (PbMoO4)—stolzite (PbWO4) series were investigated by single-crystal X-ray diffraction. The results indicate that the symmetry is I41/a from nearly pure wulfenite to intermediate compositions, in contrast to previous work which claimed a symmetry change to 74 symmetry (acentric) for intermediate compositions compared with I41/a (centric space group) for the end-members. The results reported here show that the reflections violating I41/a symmetry observed in this work and in a previous study are related primarily to λ/2 effects, even if Renninger effects are not excluded. Consequently, we find that the I41/a symmetry is retained throughout the wulfenite— stolzite.

scholarly journals β-Y(BO2)3 – a new member of the β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu) structure family

2017 ◽  
Vol 72 (12) ◽  
pp. 983-988 ◽  
Author(s):  
Martin K. Schmitt ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Abstractβ-Y(BO2)3 was synthesized in a Walker-type multianvil module at 5.9 GPa/1000°C. The crystal structure has been elucidated through single-crystal X-ray diffraction. β-Y(BO2)3 crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a=15.886(2), b=7.3860(6), and c=12.2119(9) Å. Its crystal structure will be discussed in the context of the isotypic lanthanide borates β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu).

Superstructure formation in the solid solution Sc3Pt3−xIn3 (x = 0–0.93)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nataliya L. Gulay ◽  
Rolf-Dieter Hoffmann ◽  
Jutta Kösters ◽  
Yaroslav M. Kalychak ◽  
Stefan Seidel ◽  
...  
Keyword(s):  
Solid Solution ◽  
Diffraction Data ◽  
High Frequency ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Platinum Content ◽  
Arc Melting ◽  
Modulation Vector

Abstract The equiatomic indide ScPtIn (ZrNiAl type, space group P 6 ‾ $‾{6}$ 2m) shows an extended solid solution Sc3Pt3–xIn3. Several samples of the Sc3Pt3–xIn3 series were synthesized from the elements by arc-melting and subsequent annealing, or directly in a high frequency furnace. The lowest platinum content was observed for Sc3Pt2.072(3)In3. All samples were characterized by powder X-ray diffraction and their lattice parameters and several single crystals were studied on the basis of precise single crystal X-ray diffractometer data. The correct platinum occupancy parameters were refined from the diffraction data. Decreasing platinum content leads to decreasing a and c lattice parameters. Satellite reflections were observed for the Sc3Pt3–xIn3 crystals with x = 0.31–0.83. These satellite reflections could be described with a modulation vector ( 1 3 , 1 3 , γ ) $\left(\frac{1}{3},\frac{1}{3},\gamma \right)$ ( γ = 1 2 $\gamma =\frac{1}{2}$ c* for all crystals) and are compatible with trigonal symmetry. The interplay of platinum filled vs. empty In6 trigonal prisms is discussed for an approximant structure with space group P3m1.

Sign in / Sign up

Export Citation Format

Share Document