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HomeKey Engineering MaterialsKey Engineering Materials Vols. 317-318A Structural Consideration of a Solid Solution...

A Structural Consideration of a Solid Solution La₄Ni_3-xMn_xO₁₀

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Abstract:

The solubility of manganese ion in layered perovskite La4Ni3O10 phase was examined and the detailed crystal structure of this phase was discussed. The solid solution of La4Ni3-xMnxO10 was prepared by solid state reaction. The crystal structure of La4Ni3-xMnxO10 was analyzed by powder X-ray diffraction and Rietveld methods. The solid solution for x=0.5 had a orthorhombic system with lattice parameter a=0.5485(0), b=0.5433(6) and c=2.8034(9). In detailed observation of the X-ray diffraction data, some superlattice reflections that were forbidden for a face centered orthorhombic cell were identified. A possible space group Pnnn (no.48) was derived from the reflection conditions.

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The Science of Engineering Ceramics III

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Periodical:

Key Engineering Materials (Volumes 317-318)

Pages:

877-880

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.317-318.877

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Online since:

August 2006

Authors:

Shunkichi Ueno, Halina B. Misram, Naoki Kamegashira

Keywords:

Layered Perovskite, Rietveld Analysis, Superstructure

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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[1] S. N. Ruddlesden and P. Popper: Acta Crystallogr. Vol. 11 (1958) 54.

[2] M. Seppanen: Scand. J. Metallugy Vol. 8 (1979) 191.

[3] A. K. Tkalich, V. P. Glazkov, V. A. Somenkov, S. Sh. Shil'shtein, A. E. Ear'kin and A. V. Mirmel'shtein: Superconductivity Vol. 4 (1991) 2280.

[4] Ph. Lacorre: J. Solod State Chem. Vol. 97 (1992) 495.

[5] Z. Zhang and M. Greenblatt: J. Solid State Chem. Vol. 117 (1995) 236.

[6] R. A. Mohan Ram, L. Ganapathi, P. Ganguly and C. N. R. Rao: J. Solid State Chem. Vol. 63 (1986) 139.

[7] F. Izumi: J. Crystallogr. Soc. Jpn. Vol. 27 (1985) 23.

[8] F. Izumi: J. Mineralogical Soc. Jpn. Vol. 17 (1985) 37. Table 1 The lattice parameters for solid solution La4Ni3-xMnxO10 phases. All of these phases were indexed orthorhombic cell. x= a (nm) b (nm) c (nm) V (nm 3).

25 0. 5481 0. 5432 2. 8106 0. 8368.

30 0. 5485 0. 5432 2. 8028 0. 8351.

40 0. 5476 0. 5430 2. 8001 0. 8326.

50 0. 5485 0. 5433 2. 8034 0. 8353.

75.

5486 0. 5433 2. 8038 0. 8357 *: This sample include impurity phase. Table 2 The crystallographic data and reliable factors for La4Ni2. 5Mn0. 5O10 phase. Radiation 2θ range ( o) Step scan increment (2θo) Counting time (s . step-1) CuKα 20-100.

03 3 Space group a (nm) b (nm) c (nm) V (nm 3) No. of reflections Fmmm (No. 69).

54850(4).

54336(8).

[2] 803(4).

835(3) 149 Table 2 (Cont. ) Reliable factors RWP RP RI RF.

1889.

1527.

0486.

0285 Table 3 The fractional coordinate and isotropic thermal parameters for La4Ni2. 5Mn0. 5O10 phase. Atom site x y z B(nm2) (Ni, Mn)(1) (Ni, Mn)(2) La(1) La(2) O(1) O(2) O(3) O(4) 4a 8i 8i 8i 8e 8i 8i 16j.

DOI: 10.1088/2058-7058/34/10/10

0.

0.

0.

0.

25.

0.

0.

25.

0.

0.

0.

0.

25.

0.

0.

25.

0.

1402(1).

3009(2).

4304(9).

0.

063(8).

2126(3).

1432(5).

0105(3).

0070(1).

0082(4).

0085(5).

0279(0).

0505(9).

0468(0).

0375(7) Table 4 Some importance interatomic distances. Interatomic Distances (nm) (Ni, Mn)(1)-O(1) (Ni, Mn)(1)-O(2) (Ni, Mn)(2)-O(2) (Ni, Mn)(2)-O(3) (Ni, Mn)(2)-O(4) O(1)-O(1) O(3)-O(3) La(1)-La(2) La(1)-O(3) La(1)-O(4) La(2)-O(1).

DOI: 10.1515/9783110268959.2247

(1930).

1768.

2162.

(2030).

(1930).

3860.

2743.

3430.

3451.

3632.

2475.

2743.

2484.

2828.

2742.

2722 Fig. 2 The calculated and observed X-ray diffraction patterns of La4Ni2. 5Mn0. 5O10 phase. Fig. 1 The structural model of La4Ni3O10 phase. Fig. 3 Oxygen octahedrons in the structure. Fig. 4 The superlattice reflections.