X-Ray radial distribution function analysis of acid volcanic glasses from the Eastern Rhodopes, Bulgaria

1989 ◽  
Vol 16 (8) ◽  
pp. 774-782 ◽  
Author(s):  
N. Zotov ◽  
V. Dimitrov ◽  
Y. Yanev
Keyword(s):  
Distribution Function ◽  
Radial Distribution Function ◽  
Radial Distribution ◽  
Function Analysis ◽  
X Ray ◽  
Acid Volcanic ◽  
Volcanic Glasses ◽  
Eastern Rhodopes

X-ray radial distribution function analysis of amorphous silicon obtained from rice husk

1991 ◽  
Vol 10 (15) ◽  
pp. 903-904
Author(s):  
K. C. Nandi ◽  
D. Mukherjee ◽  
H. N. Acharya ◽  
A. K. Datta
Keyword(s):  
Distribution Function ◽  
Amorphous Silicon ◽  
Radial Distribution Function ◽  
Rice Husk ◽  
Radial Distribution ◽  
Function Analysis ◽  
X Ray

Structural characterization of zinc sulphide thin films by radial distribution function analysis using x - ray scattering

2012 ◽  
Author(s):  
Maria Stefan ◽  
Emil Indrea ◽  
Elisabeth-Jeanne Popovici ◽  
Maria Loredana Soran ◽  
Ovidiu Pana ◽  
...  
Keyword(s):  
Thin Films ◽  
Distribution Function ◽  
Radial Distribution Function ◽  
Radial Distribution ◽  
Structural Characterization ◽  
Function Analysis ◽  
Zinc Sulphide ◽  
X Ray ◽  
X Ray Scattering

Influence of neglected small-angle scattering in radial distribution function analysis

1971 ◽  
Vol 4 (4) ◽  
pp. 277-283 ◽  
Author(s):  
G. S. Cargill
Keyword(s):  
Distribution Function ◽  
Radial Distribution Function ◽  
Radial Distribution ◽  
Small Angle ◽  
Function Analysis ◽  
Small Angle Scattering ◽  
Density Fluctuations ◽  
Atomic Density ◽  
X Ray ◽  
Angle Scattering

Materials containing inhomogeneities (density-fluctuations) of much greater than atomic size produce scattering at very small angles, which may go unobserved in many X-ray, electron, and neutron scattering experiments. For liquids and for amorphous and polycrystalline solids composed of one atomic species, an approximate expression for the reduced radial distribution function obtained from intensity measurements which neglect the small-angle scattering is shown to be Gexp(r) = 4πr{ρ(r) − ρ0[1 + (\overline {\eta^2}η2(ω)/ρ0 2)γ(ω, r)]} where ρ(r) is the atomic distribution function, ρ0 is the average atomic density, \overline {\eta^2}(ω) is the average square of atomic density fluctuations, γ(ω,r) is the density fluctuation correlation function, and ω is a volume element larger than the average atomic volume but smaller than the scale of long-range density fluctuations. This expression is also valid for systems composed of more than one type of atom where ρ(r) is a weighted average of pair distribution functions and [\overline {\eta^2}(ω)/ρ0 2]γ(ω,r) for X-ray scattering describes electron density fluctuations The neglect of small-angle scattering gives rise to a G exp(r) which appears, from its slope at small r, to correspond to a material of greater average atomic density ρ0,exp than that of the sample being studied. These results are illustrated by application to fluid argon (ρ0,exp/ρ0 = 1.17 near the critical point), to amorphous silicon (ρ0,exp/ρ0 = 1.13), and to phase separated PbO–B2O3 glasses (ρ0,exp/ρ0 = 1.07 for 24 wt. % PbO).

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