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A series of “chemically twinned rutile” oxides, SrM2n+1O4n+5 (M=Ti, Nb; n=3→9)

Published online by Cambridge University Press:  10 January 2013

J. M. Loezos ,
T. A. Vanderah ,
A. R. Drews  and
R. S. Roth
J. M. Loezos
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
T. A. Vanderah
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
A. R. Drews
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
R. S. Roth
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Abstract

X-ray powder diffraction data and refined unit cell parameters for SrTi3Nb4O17, SrTi5Nb4O21, SrTi7Nb4O25, SrTi9Nb4O29, SrTi11Nb4O33, SrTi13Nb4O37, and SrTi15Nb4O41 are reported here. The powder patterns for these oxides suggest that they form a homologous series SrM2n+1O4n+5 (M=Ti, Nb; n=3→9), which is isostructural with the orthorhombic “chemically twinned rutile” series found previously in the K2O-TiO2-Ta2O5 and BaO-TiO2-Nb2O5 systems. The structures are built of corner-sharing slabs of the rutile structure; successive members are generated by adding 2TiO2 to the slab thickness of the previous member. The series crystallizes in space group Cmcm (No. 63), with members exhibiting similar a-, b-dimensions (∼6.6, ∼8.9 Å; respectively), and c-dimensions that linearly increase (by ∼4.4 Å per member) from 20.8 Å for n=3 to 47.1 Å for n=9.

Type
Research Article
Information
Powder Diffraction , Volume 12 , Issue 2 , June 1997 , pp. 117 - 125
Copyright
Copyright © Cambridge University Press 1997

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References

Dowty, E. (1995). ATOMS for Windows (version 3.0), the computer program to display atomic structures, Shape Software (74457.1703@compuserve.com).Google Scholar
Gatehouse, B. M., and Nesbit, M. C. (1980). “A new alkali metal titanotantalate, KTi 2Ta 5O 17—A compound that exhibits the “chemically twinned” rutile structure,” J. Solid State Chem. 33, 153–158.CrossRefGoogle Scholar
Groult, D., and Raveau, B. (1983). “A member of a series of chemically twinned rutile oxides (AM 3O 9)(M 2O 4) n,” Mater. Res. Bull. 18, 141–146.CrossRefGoogle Scholar
Larson, A. C., and Von Dreele, R. B. (1994). GSAS General Structure Analysis System, Los Alamos National Laboratory.Google Scholar
Lowe-Ma, C. K. (1993). “Refinement of unit cell parameters by least-squares: Comments on an old technique and the development of a new computer program (CELLSVD),” Naval Air Warfare Center Weapons Division Technical Publication 8128, September 1993 (clowema@ford.com).Google Scholar
McMurdie, H. F., Morris, M. C., Evans, E. H., Paretzkin, B., Wong-Ng, W., and Zhang, Y. (1987). “Standard x-ray diffraction powder patterns from the JCPDS Research Associateship,” Powder Diffr. 2, 43.CrossRefGoogle Scholar
Millet, J. M., Roth, R. S., Ettlinger, L. D. (1987). “Phase equilibria and crystal chemistry in the ternary system BaO-TiO 2-Nb 2O 5 I,” J. Solid State Chem. 67, 259–270.CrossRefGoogle Scholar
Rasberry, S. D. (1980). Certificate of Analysis, SRM 660, National Institute of Standards and Technology, Gaithersburg, MD 20899.Google Scholar