An X-Ray Diffraction Study on an Aqueous Solution of CdSO4 at 9 and 62 °C

1981 ◽  
Vol 36 (10) ◽  
pp. 1062-1066
Author(s):  
Ruggero Caminiti
Keyword(s):  
Aqueous Solution ◽  
Diffraction Study ◽  
Structural Unit ◽  
Water Molecules ◽  
Liquid Sample ◽  
X Ray Diffraction ◽  
Experimental Distribution ◽  
X Ray ◽  
X Ray Scattering ◽  
Increasing Temperature

The X-Ray scattering of a 2 M aqueous solution CdSO4 has been measured at 9 and 62 °C in a “Θ-Θ” transmission arrangement with a plane-parallel liquid sample. The experimental distribution curves show main peaks at about 1.5, 2.3, 2.8, 3.5, and 4.35 Å. The 3.5 A peak reveals the formation of inner sphere cadmium-sulphate complexes Cd(H2O)6-z(OSO3)z+2-2z, in which oxygens from sulphate groups substitute z water molecules of the hydrated Cd(H2O)62+ ions. Least squares refinements of the i(s) curves are consistent with a structural unit in which the sulphate tetrahedron shares a corner with one cadmium octahedron with Cd-O-S angle of 133 deg. The average number (z) of coordinated sulphate ions increases with increasing temperature.

A Comparative X-Ray Diffraction Study of Aqueous MnSO4 and Crystals of MnSO4·5H2O

1982 ◽  
Vol 37 (6) ◽  
pp. 581-586 ◽  
Author(s):  
R. Caminiti ◽  
G. Marongiu ◽  
G. Paschina
Keyword(s):  
Crystal Structure ◽  
Experimental Data ◽  
Single Crystal ◽  
Diffraction Study ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Good Agreement ◽  
Single Crystal Analysis

Abstract X-ray single crystal analysis of MnSO4·5H2O shows that the manganese atoms are octahedrally coordinated by oxygen atoms, four of which belong to water molecules and two to sulphate groups. A model derived from the crystal structure was fitted to the X-ray scattering intensities from aqueous MnSO4. Good agreement with experimental data is achieved using a model in which Mn(H2O)6-z(OSO3)z+2-2z interacts with about ten water molecules and each sulphate ion with about seven water molecules.

Structural Study of a new Compound Based on Acid 1,4-Cyclohexanedicarboxylic (1,4-CDC)

2010 ◽  
Vol 6 (1) ◽  
pp. 891-896
Author(s):  
Manel Halouani ◽  
M. Dammak ◽  
N. Audebrand ◽  
L. Ktari
Keyword(s):  
Aqueous Solution ◽  
Water Molecules ◽  
Carboxyl Group ◽  
X Ray Diffraction ◽  
Compound I ◽  
Unit Cell Parameters ◽  
Monoclinic System ◽  
X Ray ◽  
Cell Parameters ◽  
Cyclohexanedicarboxylic Acid

One nickel 1,4-cyclohexanedicarboxylate coordination polymers, Ni2 [(O10C6H4)(COO)2].2H2O  (I), was hydrothermally synthesized from an aqueous solution of Ni (NO3)2.6H2O, (1,4-CDC) (1,4-CDC = 1,4-cyclohexanedicarboxylic acid) and tetramethylammonium nitrate. Compound (I) crystallizes in the monoclinic system with the C2/m space group. The unit cell parameters are a = 20.1160 (16) Å, b = 9.9387 (10) Å, c = 6.3672 (6) Å, β = 97.007 (3) (°), V= 1263.5 (2) (Å3) and Dx= 1.751g/cm3. The refinement converged into R= 0.036 and RW = 0.092. The structure, determined by single crystal X-ray diffraction, consists of two nickel atoms Ni (1) and Ni (2). Lots of ways of which is surrounded by six oxygen atoms, a carboxyl group and two water molecules.

X-ray diffraction study of a “three-ion” aqueous solution

1977 ◽  
Vol 47 (2) ◽  
pp. 275-278 ◽  
Author(s):  
R. Caminiti ◽  
G. Licheri ◽  
G. Piccaluga ◽  
G. Pinna
Keyword(s):  
Aqueous Solution ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

Raman Spectroscopic and X-ray Diffraction Studies on Concentrated Aqueous Zinc (II) Bromide Solution at High Temperatures

1992 ◽  
Vol 47 (3) ◽  
pp. 485-492 ◽  
Author(s):  
Toshiyuki Takamuku ◽  
Mikito Ihara ◽  
Toshio Yamaguchi ◽  
Hisanobu Wakita
Keyword(s):  
Diffraction Data ◽  
Broad Band ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
X Ray Scattering ◽  
Bromide Solution ◽  
Stretching Vibration ◽  
Increasing Temperature

Abstract Raman and X-ray scattering experiments have been performed on an aqueous zinc (II) bromide solution with molar ratio [ H2 0] / [ ZnBr2 ] =10 at 25 to 140 °C. The intensity of the totally symmetric Zn - Br stretching vibration (ν1) for the dibromozinc(II) complex increased with increasing temperature while that for the tetrabromo complex decreased. A broad band assigned to the symmetric Zn - O stretching vibration ( ν1 ) for the aqua zinc (II) ion decreased in intensity with increasing temperature. The X-ray diffraction data revealed that the average number of the Zn - Br interactions within the zinc (II) bromo complexes does not change with temperature, whereas the number of Br ··· Br nonbonding interactions within the complexes decreases from 1.8 at 25 °C to 1.5 at 100 °C. From both Raman and X-ray data it is concluded that with increasing temperature the dibromo species is favored, whereas the tetrabromo and aqua zinc(II) species are unstable in the solution. The analysis of the X-ray diffraction data has shown that the mean Zn - Br bond length within the zinc (II) bromo complexes shortens gradually with increasing temperature, accompanied with an increase in the interligand Br ···Br distance. This finding suggests that the Br - Zn - Br bond angle increases with decreasing Zn - Br distance for the lower zinc(II) bromo complexes. The equilibrium shift of the zinc (II) bromo complexes with temperature is discussed on the basis of ion-ion, ion-water, and water-water interactions

The sulphate ion in aqueous solution: an X-ray diffraction study of a ZnSO4solution

1982 ◽  
Vol 15 (6) ◽  
pp. 621-625 ◽  
Author(s):  
A. Musinu ◽  
G. Paschina ◽  
G. Piccaluga ◽  
M. Magini
Keyword(s):  
Aqueous Solution ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document