A procedure for the choice of prior estimates of pair correlation functions for maximum entropy inversion of neutron diffraction structure factors in disordered systems

Abstract Neutron diffraction experiments were performed with four molten Sn-Zn-alloys and the two molten elements Sn and Zn. The total structure factors and the pair correlation functions are given. The observed small angle scattering leads to the result that pairs of equal atoms predominate within the range of medium concentrations.

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Structure of Molten Bi-Zn-Alloys by Means of Neutron Diffraction

Zeitschrift für Naturforschung A ◽

10.1515/zna-1983-0402 ◽

1983 ◽

Vol 38 (4) ◽

pp. 395-398 ◽

Cited By ~ 11

Author(s):

W. Knoll ◽

P. Lamparter ◽

S. Steeb

Keyword(s):

Neutron Diffraction ◽

Concentration Dependence ◽

Correlation Functions ◽

Pair Correlation ◽

Nearest Neighbour ◽

Pair Correlation Functions ◽

Coordination Numbers ◽

Structure Factors ◽

Total Structure ◽

Zn Alloys

Neutron diffraction experiments were performed with five molten Bi-Zn-alloys and the two molten elements Bi and Zn. The total structure factors and the pair correlation functions are given. The concentration dependence of the experimental nearest neighbour distances and the experimental coordination numbers is in accordance with the segregation behaviour prevailing in these melts.

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Combination of X-Ray and Neutron Diffraction for Determination of Partial Pair Correlation Functions of Amorphous Alloys: A New Approach

Materials Science Forum ◽

10.4028/www.scientific.net/msf.321-324.282 ◽

2000 ◽

Vol 321-324 ◽

pp. 282-289 ◽

Cited By ~ 1

Author(s):

A.F. Sidorenko ◽

Yu.A. Babanov ◽

D. Raoux ◽

S. Lefebvre

Keyword(s):

Neutron Diffraction ◽

Correlation Functions ◽

Amorphous Alloys ◽

Pair Correlation ◽

New Approach ◽

Pair Correlation Functions ◽

X Ray

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X-ray- and Neutron-diffraction Studies with Quasicrystalline and Amorphous Al-V- and Al-Mn-alloys

Zeitschrift für Naturforschung A ◽

10.1515/zna-1990-0507 ◽

1990 ◽

Vol 45 (5) ◽

pp. 627-638

Author(s):

S. Seehafer ◽

P. Lamparter ◽

S. Steeb

Keyword(s):

Neutron Diffraction ◽

Coordination Number ◽

Correlation Functions ◽

Melt Spinning ◽

Pair Correlation ◽

Partial Density ◽

Isomorphous Substitution ◽

Hard Sphere Model ◽

X Ray ◽

Structure Factors

Abstract Amorphous and quasicrystalline samples of Al84Mn16 and Al84V16 were produced by sputtering and melt-spinning, respectively. From X-ray and neutron-diffraction-results the total structure factors were evaluated. For amorphous as well as for quasicrystalline Al84V16 the partial SAl-Al- and SAl-V-structure factors were obtained, which yield the corresponding partial pair correlation functions, the atomic distances, and the partial coordination numbers. Also some information concerning the partial Bhatia-Thornton correlation functions could be obtained. Both the amorphous and the quasicrystalline Al-V-alloys show a linear expansion by a factor of 1.03 compared to the corresponding Al-Mn-alloy. The two amorphous alloys can be designed as isomorphous, whereas the quasicrystalline ones show pronounced deviations in the distance between unequal atoms. The shortest atomic distance in amorphous Al84V16 is 2.69 A, being,formed by Al-V-pairs with a coordination number 2. The nearest Al-Al-distance amounts to 2.84 A with a coordination number 8. The partial density-concentration correlation function clearly deviates from the hard sphere model. With the quasicrystalline specimens, the isomorphous substitution of Mn- and V-atoms is not perfect. The Al-V-correlation is split up, and this is not observed for the Al-Mn-correlation. Comparison of the amorphous and the corresponding quasicrystalline alloy shows some similarities

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X-Ray Investigations on Molten Cu-Sb Alloys

Zeitschrift für Naturforschung A ◽

10.1515/zna-1994-4-502 ◽

1994 ◽

Vol 49 (4-5) ◽

pp. 530-534 ◽

Cited By ~ 8

Author(s):

Th. Halm ◽

H. Neumann ◽

W. Hoyer

Keyword(s):

Electronic Properties ◽

Structure Factor ◽

Correlation Functions ◽

Pair Correlation ◽

Model Structure ◽

X Ray Diffraction ◽

X Ray ◽

Structure Factors ◽

Diffraction Structure ◽

Eutectic Concentration

Abstract Using X-ray diffraction, structure factors and pair correlation functions of several molten Cu-Sb alloys and pure antimony were determined and compared with published structural, thermodynamic and electronic properties. The eutectic concentration Cu37Sb63 was investigated in dependence on temperature, and a model structure factor was calculated applying a segregation model.

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