Infrared Spectroscopy, X-ray Diffraction and Neutron Diffraction Study of BaFe12−xAlxO19 Solid Solutions

2019 ◽  
Vol 74 (6) ◽  
pp. 584-588 ◽  
Author(s):  
R. E. Huseynov ◽  
A. I. Mammadov ◽  
R. Z. Mehdiyeva ◽  
A. V. Trukhanov ◽  
S. V. Trukhanov ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Solid Solutions ◽  
Neutron Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

NEUTRON DIFFRACTION STUDY ON (Bi−Pb)2Sr2Ca2Cu3O10

1990 ◽  
Vol 04 (12) ◽  
pp. 791-794 ◽  
Author(s):  
YANG JI-LIAN ◽  
YE CHUN-TANG ◽  
ZHANG BAI-SHENG ◽  
LI JI-ZHOU ◽  
KANG JIAN ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Single Phase ◽  
Polycrystalline Sample ◽  
Neutron Diffraction Study ◽  
Structure Study ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

The polycrystalline sample of (Bi–Pb)2Sr2Ca2Cu3O10 with Tc=107 K was prepared. The X-ray diffraction proved that the sample is single phase. The crystal structure study on the sample has been carried out by neutron diffraction. The result shows that its structure is tetragonal body-centre structure with space group of I4/mmm, containing a few oxygen atoms at 4e site in Bi–Pb layers.

Compressibility of the high-pressure polymorph of AlOOH to 17 GPa

2009 ◽  
Vol 73 (3) ◽  
pp. 479-485 ◽  
Author(s):  
A. Suzuki
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Neutron Diffraction ◽  
Bulk Modulus ◽  
Diffraction Study ◽  
Neutron Diffraction Study ◽  
X Ray Diffraction ◽  
Pressure Derivative ◽  
X Ray ◽  
A Value

AbstractThe equation of state of δ-AlOOH was investigated using powder X-ray diffraction up to 17 GPa. Measurement of the volume at 300 K gave a value of the bulk modulus of K0 = 124(2) GPa, whereas its pressure derivative was K’ = 13.5(7). The b axis of the unit cell is more compressible than the a and c axes – in agreement with a neutron diffraction study at high pressure by Sano-Furukawa et al. (2008). Measurements presented here show that δ-AlOOH has a compressibility 200% higher than in the previously reported equation of state by Vanpeteghem et al. (2002).

Li+/Na+ β-Alumina: A Combined Single-Crystal Neutron and X-ray Diffraction Study

1997 ◽  
Vol 53 (4) ◽  
pp. 631-638 ◽  
Author(s):  
K. Edström ◽  
T. Gustafsson ◽  
J. O. Thomas ◽  
G. C. Farrington
Keyword(s):  
Neutron Diffraction ◽  
Single Crystal ◽  
Diffraction Study ◽  
Charge Compensation ◽  
Neutron Diffraction Study ◽  
X Ray Diffraction ◽  
Frenkel Defect ◽  
X Ray ◽  
Ionic Distribution ◽  
Conduction Plane

The crystal structure and ionic distribution in the conduction plane of the partially exchanged Na+ \beta-alumina system Li0.75Na0.47Al11O17.11 has been determined from single-crystal X-ray diffraction at 30 and 298 K, in combination with a single-crystal neutron diffraction study at 295 K. At 30 K the Li+ ions occupy two sites: one in (2/3, 1/3, 1/4) and one ∼1.0 Å out of the z = 1/4 conduction plane. The Na+ ions are also found in two sites, both in the conduction plane. At 298 K the Li+ ions are found in three sites; the same two sites as at 30 K, as well as at a third site between these two. The Na+ ions occupy the same sites as at 30 K. The combination of X-ray and neutron diffraction is used to resolve the distribution of Na+ and Li+ ions. The column O5 atom in the Al3—O5—Al3 bridge between the spinel blocks is found to be disordered. Charge compensation is achieved through a Frenkel defect of two interstitial Al atoms, one on either side of the conduction plane, together with an extra oxygen in the conduction plane. One such defect occurs, on average, in every 4.5 unit cells.

Temperature-dependent X-ray and neutron diffraction study of BiB3O6

2007 ◽  
Vol 222 (12/2007) ◽  
Author(s):  
Wolf-Dieter Stein ◽  
Alain Cousson ◽  
Petra Becker ◽  
Ladislav Bohatý ◽  
Markus Braden
Keyword(s):  
Thermal Expansion ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Neutron Diffraction Study ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Single Crystalline ◽  
X Ray ◽  
Anisotropic Thermal Expansion

The structure of bismuth triborate has been analyzed by the combination of neutron and X-ray diffraction on powder and on single-crystalline samples. Bismuth triborate exhibits a distinct anisotropic thermal expansion with the coefficient along

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