The crystal structure and polarised Raman spectrum of Rb2AgI3

1977 ◽  
Vol 55 (9) ◽  
pp. 1511-1514 ◽  
Author(s):  
Ian David Brown ◽  
Helen Elaine Howard-Lock ◽  
Mahadevan Natarajan
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Space Group ◽  
Symmetry Species

The crystal structure of Rb2AgI3, space group Pnma, a = 10.258(2), b = 4.886(4), c = 20.063(10) Å, has been refined. It is isostructural with K2AgI3 with chains of corner linked AgI4 tetrahedra (Ag—I(bridge) = 2.881 Å, Ag—I(terminal) = 2.834 Å) running along b. The average bonding distance around the two seven coordinate Rb atoms is 3.722 Å. The polarised Raman spectrum shows the expected 36 modes which are assigned to four different symmetry species. All modes occur with frequencies less than 112 cm−1.

Synthese, Eigenschaften und Kristallstruktur von (NH4)NbOBr4/ Synthesis, Properties and Crystal Structure of (NH4)NbOBr4

1988 ◽  
Vol 43 (8) ◽  
pp. 981-984 ◽  
Author(s):  
Manfredo Hörner ◽  
Wolfgang Hiller ◽  
Joachim Strähle ◽  
George M. Sheldrick
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Glass Surface ◽  
Vibrational Frequencies ◽  
Monoclinic Space Group ◽  
Glass Ampoule ◽  
Space Group ◽  
Square Planar ◽  
Synthesis Properties ◽  
Ir And Raman

Abstract (NH4)NbOBr4 is obtained as air sensitive, light red crystals from NH4Br and NbBr 5 in a sealed glass ampoule at 420 °C, whereby the oxygen presumably originates from the glass surface. The compound crystallizes in the monoclinic space group C2/m with a = 1269.9(1), b = 1384.7(2). c = 773.0(2) pm, β = 114.44(2)° and Z = 6. The structure is built up by NH4+ cations and polymeric NbOBr4 anions. Symmetrical linear oxo bridges with Nb-O = 199 pm connect square planar NbBr4 units to form endless chains arranged in planes parallel (010). Neighbouring NbBr4 units are in eclipsed as well as staggered orientations. The NH4+ cations are located between the planes of parallel NbOBr4 - chains. The vibrational frequencies of the IR and Raman spectrum are assigned.

Structural characterization and Raman spectrum of Cs[OCN]

2020 ◽  
Vol 75 (1-2) ◽  
pp. 129-133
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Alkali Metal ◽  
Single Crystals ◽  
Structural Characterization ◽  
Title Compound ◽  
Fermi Resonance ◽  
Metal Compounds ◽  
Space Group ◽  
Alkali Metal Compounds

AbstractThe compound Cs[OCN] has been synthesized and its crystal structure and Raman spectrum were determined on selected single crystals. As postulated in earlier work, the title compound crystallizes isopointal to KN3 exhibiting the space group I4/mcm (no. 140, Z = 4) with the lattice parameters a = 653.79(2) and c = 799.42(5) pm. The Raman spectrum verified the nature of the triatomic moiety and shows the frequencies typical for an [OCN]− anion with Fermi resonance between the 2δ and the νsym vibrations. The undisturbed frequencies and the resulting force constants have been calculated and compared to those of other alkali metal compounds containing comparable linear triatomic anions.

Raman spectrum of cadmium nitrate

1978 ◽  
Vol 31 (6) ◽  
pp. 1189 ◽  
Author(s):  
DW James ◽  
MT Carrick ◽  
WH Leong
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Potential Energy ◽  
Raman Spectra ◽  
Site Symmetry ◽  
Cadmium Nitrate ◽  
Multiple Site ◽  
Space Group ◽  
Anhydrous Salt ◽  
Centrosymmetric Space Group

The Raman spectra of Cd(NO3)2,4H2O and anhydrous Cd(NO3)2 are reported. The spectrum of Cd(NO3)2,4H2O is compatible with the known crystal structure Fdd2. The spectrum of the anhydrous salt is complex and indicates that the 16 NO3- ions are on four sites with different potential energy environments and each site is occupied by four NO3- ions. The centrosymmetric space group Pbcm is favoured to the non- centrosymmetric space group Pca21. Multiple-site splitting, site- symmetry splitting and correlation-field splitting are used to explain the complex band structures.

Synthesis, Single-crystal Structure and Raman Spectrum of Cu[N(CN)2]2 · 2 NH3

2013 ◽  
Vol 68 (3) ◽  
pp. 296-300 ◽  
Author(s):  
O. Reckeweg ◽  
A. Schulz ◽  
F. J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Single Crystal ◽  
Aqueous Ammonia ◽  
Single Crystal Structure ◽  
Ambient Conditions ◽  
Space Group ◽  
Cell Parameters

Transparent blue crystals of Cu[N(CN)2]2 · 2 NH3 were obtained by blending solutions of Na[N(CN)2] and Cu(NO3)2 · 2.5 H2O in aqueous ammonia and subsequent evaporation of the solvent under ambient conditions. Cu[N(CN)2]2 · 2 NH3 crystallizes in space group P1̄ (no. 2, Z = 2) with the cell parameters a = 746:1(4), b = 747:8(4) and c = 894:4(5) pm, and the angles α = 68:94(2), β = 75:52(1) and γ = 68:22(4)°. The presence of the dicyanamide anion and the ammonia molecules was verified by Raman spectroscopy.

Synthesis, crystal structure and Raman spectrum of Ba7[BO3]3Br(O1.33F1.33)

2017 ◽  
Vol 72 (3) ◽  
pp. 193-197
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Single Crystals ◽  
Amorphous Material ◽  
Lattice Parameters ◽  
Space Group ◽  
Moisture Sensitive

Abstract In addition to amorphous material and Ba7[BO3]4−x F2−3x , air and moisture sensitive single crystals of Ba7[BO3]3Br(O1.33F1.33) were formed from H3BO3, Ba(OH)2, BaF2 and BaBr2·2 H2O in alumina crucibles open to the atmosphere at 1300 K for 13 h. Ba7[BO3]3Br(O1.33F1.33) crystallizes in the hexagonal space group P63mc (no. 186, Z=2) with the lattice parameters a=1118.1(2) and c=723.93(13) pm. The Raman spectrum of the title compounds was also acquired and is compared to literature data.

The Mixed Lanthanum Dichalcogenide β-LaS1.86(1)Se0.14(1). Synthesis, Crystal Structure, Raman Spectrum and Optical Band Gap

2011 ◽  
Vol 66 (9) ◽  
pp. 873-876
Author(s):  
Christian Bartsch ◽  
Thomas Doert
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Band Gap ◽  
Optical Spectroscopy ◽  
Optical Band Gap ◽  
Structure Type ◽  
Lattice Parameters ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Lanthanum Sulfide

The ternary lanthanum sulfide selenide β -LaS1.86(1)Se0.14(1) was obtained by reaction of the elements in an NaCl flux. The new compound adopts the β -LnS2 structure type and crystallizes in the orthorhombic space group Pnma (no. 62) with lattice parameters of a = 814.77(1), b = 1638.46(1) and c = 413.88(1) pm. Raman lines indicate the presence of mixed (S1−ySey)2− dianions with y ≈ 0.14, besides the well known S22− dianions. The band gap of β -LaS1.86(1)Se0.14(1) is 2.5 eV as determined by optical spectroscopy.

Preparations and the crystal structure of 3SbF3•4SbF5

1989 ◽  
Vol 67 (11) ◽  
pp. 2041-2046 ◽  
Author(s):  
John Fawcett ◽  
John H. Holloway ◽  
David R. Russell ◽  
Anthony J. Edwards ◽  
Khalaf I. Khallow
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Single Crystals ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Large Excess ◽  
Space Group ◽  
X Ray

3SbF3•4SbF5 has been prepared from the reaction of SbF3 with a large excess of SbF5 and from the reaction of WF5 with SbF5 in Genetron 113. An X-ray structure determination has shown that the compound crystallizes in the monoclinic space group P21/c with a = 8.547(10), b = 13.521(8), c = 19.551(12) Å, β = 100.3(1)°,Z = 4with the final residual indices of R = 0.0486 and Rw = 0.0526 for 4274 unique reflections. If only Sb—F distances of less than 2.1 Å are considered the structure can be viewed in terms of the arrangement (SbF2+)(SbF2+)(SbF6−)4. A Raman spectrum from single crystals of the compound is reported. Keywords: X-ray, structure, antimony, fluoride, Raman.

Infinite Anionic Chains Formed by Alternating Bidentately Acting [SbS4]3- Anions and [Mn(dien)]2+ Complexes in the Compound [Mn(dien)2][Mn(dien)SbS4]2

2013 ◽  
Vol 68 (5-6) ◽  
pp. 605-610 ◽  
Author(s):  
Christian Näther ◽  
Nicola Herzberg ◽  
Wolfgang Bensch
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Monoclinic Space Group ◽  
Coordination Environment ◽  
Space Group ◽  
Anionic Chain ◽  
Solvothermal Conditions ◽  
The Ideal

The new compound [Mn(dien)2][Mn(dien)SbS4]2 (dien=diethylenetriamine) was synthesized under solvothermal conditions. It crystallizes in the non-centrosymmetric monoclinic space group P21 with a=7.5736(5), b=19.1081(16), c=13.1174(11) Å, b =90:022(9) , V =1898.3(3) Å3, and Z =2. The crystal structure is composed of one [Mn(dien)2]2+ cation and an anionic chain composed of [SbS4]3- anions and [Mn(dien)2]2+ cations. The [SbS4]3- anions connect [Mn(dien)2]2+ ions in a μ2-fashion to form an undulated {[Mn(dien)SbS4]}-2 chain running along [001]. The Mn2+ ions in the chain are in a rare distorted rectangular pyramidal coordination environment with 3 N and 1 S atom forming the base and one S atom being located at the apex of the pyramid. The anionic chains and the cations alternate along [010]. Several relatively strong intra- and inter-chain N-H-S bonding interactions are observed. From the Raman spectrum the reduction of the ideal Td symmetry of the [SbS4]3- anions is obvious because more resonances occur than expected for the undistorted geometry

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

scholarly journals Molekül- und Kristallstruktur von 1.1-Dimethylsilylentitanocendichlorid, (CH3)2Si(C5H4)2TiCl2 / Molecular and Crystal Structure of l,r-Dimethylsilylene Titanocene Dichloride, (CH3)2Si(C5H4)2TiCl2

1981 ◽  
Vol 36 (10) ◽  
pp. 1208-1210 ◽  
Author(s):  
Hartmut Köpf ◽  
Joachim Pickardt
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Determination ◽  
Titanocene Dichloride ◽  
Molecular And Crystal Structure ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
Space Group ◽  
X Ray ◽  
Structural Dimensions

Abstract The molecular structure of the bridged [1]-titanocenophane 1,1'-dimethylsilylene titanocene dichloride, (CH3)2Si(C5H4)2TiCl2, has been investigated by an X-ray structure determination. Crystal data: monoclinic, space group C2/c, Z = 4, a = 1332.9(3), 6 = 988.7(3), c = 1068.9(3) pm, β = 113.43(2)°. The results are compared with the structural dimensions of similar compounds: 1,1'-methylene titanocene dichloride, CH2(C5H4)TiCl2, with the unbridged titanocene dichloride, (C5H5)2TiCl2 and the ethylene-bridged compound (CH2)2(C5H4)2TiCl2

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