Crystal structure of Nd2-x Mx Ru2 O7-y (M=Cu, Ag) pyrochlores by X-ray powder diffraction

Powder Diffraction

Volumn 22, Issue 3, 2007, Pages 231-235

  Kimmel, G ^a   On, H ^a   Itzhak, D ^a   Hormadaly, J ^a  

^a BEN GURION UNIVERSITY OF THE NEGEV   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

ATOMIC POSITIONS; CUBIC UNIT CELLS; GENERAL FORMULAS; INTERNAL STANDARDS; METAL CONCENTRATIONS; PYROCHLORE STRUCTURES; RUTHENIUM OXIDE; SINGLE-PHASE STRUCTURE;

SILVER; X RAY POWDER DIFFRACTION;

DIFFRACTION;

EID: 34548240078     PISSN: 08857156     EISSN: 19457413     Source Type: Journal    
DOI: 10.1154/1.2754773     Document Type: Article

References (22)

1. Carbonio, P., Alonso, J. A., and Martinez, J. L. (1999). " Oxygen vacancy control in the defect Bi2 Ru2 O7-y pyrochlore: a way to tune electronic bandwidth., " J. Phys.: Condens. Matter 11, 361-369.
2. Carcia, P. F., Ferreti, A., and Suna, A. (1982). " Partial size effects in thick film resistors., " J. Appl. Phys. 53, 5282-5288.
3. Egdell, R. G., Goodenough, J. B., Hamnett, A., and Naish, C. C. (1983). " Electrochemistry of ruthenates. Part 1.-Oxygen reduction on pyrochlore ruthenates., " J. Chem. Soc., Faraday Trans. 1 79, 893-912.
4. Field, M., Kennedy, B. J., and Hunter, B. A. (2000). " Structural studies of metal-nonmetal transition in Ru pyrochlores., " J. Solid State Chem. 151, 25-30.
5. Garvey, R. (1986). " LSUCRIPC Least Square Unit Cell Refinement with Indexing on Personal Computer., " Powder Diffr. 1 (1), 114.
6. Haouzi, A., Muller, J., and Joulbert, L. C. (1986). " Electric and crystallographic characterizations of pyrochlore type phases Nd2-y Cuy Ru2 O7-y., " Mater. Res. Bull. 21, 1489-1493.
7. Horowitz, H. S., Longo, J. M., and Lewandowski, J. T. (1981). " New oxide pyrochlores: A2 [B2-x Ax] O7-y (A=Pb,Bi;B=Ru,Ir)., " Mater. Res. Bull. 16, 489-496.
8. ICDD (1998). " Powder diffraction file., " International Centre for Diffraction Data, edited by Frank McClune, 12 Campus Boulevard, Newtown Square, PA. 19073-3272.
9. ICDD (1999). " Powder diffraction file., " International Centre for Diffraction Data, edited by Frank McClune, 12 Campus Boulevard, Newtown Square, PA. 19073-3272.
10. Kanno, R., Takeda, Y., Yammamoto, T., Kawamoto, Y., and Yamamoto, O. (1993). " Crystal structure and electrical properties of the pyrochlore reheated Bi2-x L nx Ru2 O7., " J. Solid State Chem. 102, 106-114.
11. Kennedy, B. J. and Vogt, T. (1996). " Structural and bonding trends in ruthenium pyrochlores., " J. Solid State Chem. 126, 261-270.
12. Kimmel, G. and Sarusi, B. (1995). " EXECAL: A computer program for calibration of line position in XRPD., " Powder Diffr. 10, 227-229.
13. Kobayashi, H., Kanno, R., Kawamoto, Y., Kamiyama, T., Izumi, F., and Sleight, A. W. (1995). " Synthesis, crystal structure, and electrical properties of the pyrochlores Bi2-x L nx Ru2 O7-y (Ln=Nd,Gd)., " J. Solid State Chem. 114, 15-23.
14. Koo, H.-J., Whangbo, M.-H., and Kennedy, B. J. (1998). " Similarities and differences in the structural and electronic properties of ruthenium and iridium pyrochlores A2 M2 O7-y (M=Ru,Ir)., " J. Solid State Chem. 136, 269-273.
15. Lee, K.-S., Seo, D.-K., and Whangbo, M.-H. (1997). " Structural and electronic factors governing the metallic and nonmetallic properties of the pyrochlores A2 Ru2 O7-y., " J. Solid State Chem. 131, 405-408.
16. Pike, G. E. and Seager, C. H. (1977). " Electrical properties and conduction mechanisms of Ru-based thick film (cermet) resistors., " J. Appl. Phys. 48, 5152-5169.
17. Rietveld, H. M. (1969). " A profile refinement method for nuclear and magnetic structures., " J. Appl. Crystallogr. 2, 65-71.
18. Rodrigez-Carvajal, J. (1997). " Fullprof, Program for Rietveld refinement., " Laboratories Ĺon Brillouin (CEA-CNRS), Saclay, France.
19. Shannon, R. D. (1976). " Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides., " Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr. 32, 751-767.
20. Yamamoto, T., Kanno, R., Takeda, Y., Yamamoto, O., Kawamoto, Y., and Takano, M. (1994). " Crystal structural and metal-semiconductor transition of the Bi2-x L nx Ru2 O7 pyrochlores (Ln=Pr-Lu)., " J. Solid State Chem. 109, 372-383.
21. Young, R. A., Sakthivel, A., Moss, T. S., and Paiva-Santos, C. O. (1995). " DBWS-9411-an upgrade of the DBWS*.* programs for Rietveld refinement with PC and mainframe computers., " J. Appl. Crystallogr. 28, 366-367.
22. Zhu, W. J., Ting, S. T., and Hor, P. H. (1997). " Synthesis and characterization of ruthenium pyrochlores oxides La2-x Cdx Ru2 O7-δ, " J. Solid State Chem. 129, 308-311.