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Crystal structures and reference diffraction patterns of BaSrR4O8

  • W. Wong-Ng (a1), J. A. Kaduk (a2) and J. Dillingham (a3)


The structure of BaSrR4O8 (where R=La, Nd, Sm, Gd, Eu, Dy, Ho, Y, Er, Tm, Yb, and Lu) has been investigated, and the X-ray reference patterns of these compounds have been prepared using the Rietveld refinement technique. BaSrR2O4 are isostructural to BaR2O4, which have the CaFe2O4 structure type (orthorhombic, Pnam). The cell parameters of these compounds (R=Lu to La) range from 10.125 04(10) to 10.5501(8) Å for a, 3.362 49(3) to 3.692 04(24) Å for b, 11.846 91(13) to 12.5663(9) Å for c, and 403.33 to 489.47 Å3 for V, respectively. There is a linear relationship between V and the Shannon ionic radius of R. Unlike the BaR2O4 compositions (R=Tm, Lu, and Yb), which produced a mixture of Ba3R4O9 and unreacted lanthanide oxides, single-phase BaSrTm4O8, BaSrLu4O8, and BaSrYb4O8 were successfully prepared.


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Barry, T. L.and Roy, R. (1967). “New rare earth-alkaline earth oxide compounds. Predicted compound formation and new families found,” J. Inorg. Nucl. Chem. JINCAO 29, 12431248. jin, JINCAO
Brese, N. E.and O’Keefe, M. (1991). “Bond-valence parameters for solids,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK B47, 192197. acl, ASBSDK
Brown, I. D.and Altermatt, D. (1985). “Bond-valence parameters obtained from a systematic analysis of the inorganic crystal structure database,” Acta Crystallogr., Sect. B: Struct. Sci. ASBSDK B41, 244247. acl, ASBSDK
Chen, X., Liang, J., Wang, C., Rao, G., Xing, X., Song, Z., and Qiao, Z. (1994). “The Nd2O3–SrO–CuO system: Compounds and phase relations,” J. Alloys Compd. JALCEU 205, 101106. jal, JALCEU
Costa, G. A., Ferretti, M., Fornasini, M. L., Franceschi, E. A., and Olcese, G. L. (1989). “The crystal structure of BaY2O4, isotypic with SrY2O4,Powder Diffr. PODIE2 4, 2425. pdj, PODIE2
Decker, B. F.and Kasper, J. S. (1957). “The structure of calcium ferrite,” Acta Crystallogr. ACCRA9 10, 332. acc, ACCRA9
De Leeuw, D. W. (1989). “Structure and conductivity of copper oxide based compounds,” J. Less-Common Met. JCOMAH 150, 95107. jco, JCOMAH
Foltyn, S. R., Tiwari, P., Dye, R. C., Le, M. Q., and Wu, X. D. (1993). “Pulsed laser deposition of thick YBa2Cu3O7−x thick films with Jc>1 MA/cm2,” Appl. Phys. Lett. APPLAB 63, 18481850. apl, APPLAB
Goodilin, E., Limonov, M., Panfilov, A., Khasanova, N., Oka, A., Tajima, S., and Shiohara, Y. (1998). “Oxygen nonstoichiometry and phase transitions of the neodymum-rich Nd1+xBa2−xCu3Oz solid solution,” Physica C PHYCE6 300, 250269. phc, PHYCE6
Goyal, A., Norton, D. P., Budal, J. D., Paranthaman, M., Specht, E. D., Kroeger, D. M., Christen, D. K., He, Q., Saffian, B., List, F. A., Lee, D. F., Martin, P. M., Klabunde, C. E., Hartfield, E., and Sikka, V. K. (1996). “High critical current density superconducting tapes by epitaxial deposition of YBa2Cu3Ox thick films on biaxially textured metals,” Appl. Phys. Lett. APPLAB 69, 17951797. apl, APPLAB
He, Q., Christen, D. K., Budai, J. D., Specht, E. D., Lee, D. E., Goyal, A., Norton, D. P., Paranthaman, M., List, F. A., and Kroeger, D. M. (1997). “Deposition of biaxially-oriented metal and oxide buffer-layer films on textured Ni tapes: New substrates for high-current, high-temperature superconductors,” Physica C PHYCE6 275, 155161. phc, PHYCE6
Iijima, Y., Tanabe, N., Kohno, O., and Ikeno, Y. (1992). “In-plane aligned YBa2Cu3O7−x thin films deposited on polycrystalline metallic substrates,” Appl. Phys. Lett. APPLAB 60, 769771. apl, APPLAB
Kwestroo, W., van Hal, H. A. M., and Langereis, C. (1974). “Compounds in the system BaO–Y2O3,Mater. Res. Bull. MRBUAC 9, 16311637. mrb, MRBUAC
Larson, A. C. and Von Dreele, R. B. (1992). “GSAS, The General Structure Analysis System,” Los Alamos National Laboratory.
Lopato, L. M., Yaremenko, Z. A., and Tresvyatskii, S. G. (1966). “The reaction of oxides of rare earth elements with barium oxide,” Soviet Prog. Chem. ZZZZZZ 32, 331.
Müller-Buschbaum, H. K. (1968). “Zur Kenntnis von SrY2O4,Z. Anorg. Allg. Chem. ZAACAB 358, 138146. zaa, ZAACAB
Norton, D. P., Goyal, A., Budai, J. D., Christen, D. K., Kroeger, D. M., Specht, E. D., He, Q., Saffian, B., Paranthaman, M., Klabunde, C. E., Lee, D. F., Sales, B. C., and List, F. A. (1996). “Epitaxial YBCO on biaxially textured nickel (001) an approach to superconducting tapes with high critical current density,” Science SCIEAS 274, 755757. sci, SCIEAS
Okai, B. (1990). “High-pressure synthesis of superconducting YSr2Cu3Oy,Jpn. J. Appl. Phys., Part 2 JAPLD8 29, L21802182. jjc, JAPLD8
Osamura, K.and Zhang, W. (1990). “Phase diagrams of Ln–Ba–Cu–O systems (Ln=Lanthanide),” Z. Metallkd. ZEMTAE 84, 522528. zem, ZEMTAE
Paranthaman, M., Goyal, A., List, F. A., Specht, E. D., Lee, D. E., Martin, P. M., He, Q., Christen, D. K., Norton, D. P., Budai, J. D., and Kroeger, D. M. (1997). “Growth of biaxially textured buffer layers on rolled-Ni substrates by electron beam evaporation,” Physica C PHYCE6 275, 266272. phc, PHYCE6
PDF, Powder Diffraction File, produced by ICDD, Newtown Square, 12 Campus Blvd., Newtown Square, PA 19073-3273.
Reade, R. P., Berdahl, P., Russo, R. E., and Garrison, S. M. (1992). “Laser deposition of biaxially textured yttria-stabilized zirconia buffer layers on polycrystalline metallic alloys for high critical current YBa–Cu–O thin films,” Appl. Phys. Lett. APPLAB 61, 22312233. apl, APPLAB
Rietveld, H. M. (1969). “A profile refinement method for nuclear and magnetic structures,” J. Appl. Crystallogr. JACGAR 2, 6571. acr, JACGAR
Shannon, R. D. (1976). “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr., Sect. A: Found. Crystallogr. ACACEQ A32, 751767. acf, ACACEQ
Shannon, R. D.and Prewitt, C. T. (1969). “Effective ionic radii in oxides and fluorides,” J. Appl. Crystallogr. JACGAR 25, 925946. acr, JACGAR
Wong-Ng, W. (1992). “The ICDD/PDF coverage of the high Tc superconductor and related compounds in the A–R–Cu–O systems (A=Ba, Sr, and Ca, and R=Lanthanides and Y),” Powder Diffr. PODIE2 7, 125133. pdj, PODIE2
Wong-Ng, W.and Paretzkin, B. (1991). “Crystal chemistry and phase equilibria studies of the BaO–R2O3–CuO systems. II. X-ray characterization and standard patterns of BaR2O4, R=lanthanides,” Powder Diffr. PODIE2 6, 187189. pdj, PODIE2
Wong-Ng, W., Dillingham, J., and Cook, L. P. (2000). “Phase equilibria of the SrO–Ho2O3–CuOx system,” J. Solid State Chem. JSSCBI 149, 333337. jss, JSSCBI
Wong-Ng, W., Paretzkin, B., and Fuller, E. R. Jr. (1990a). “Crystal chemistry and phase equilibria studies of the BaO–R2O3–CuO systems. IV. Subsolidus phase relationships near the CuO rich regions,” J. Solid State Chem. JSSCBI 85, 117132. jss, JSSCBI
Wong-Ng, W., Chiang, C. K., Cook, L. P., and paretzin, B. (1990b). “Crystal chemistry and phase equilibria studies of the BaO–R2O3–CuO systems. III. X-ray powder characterization of Ba3R3Cu6O14+x, Powder Diffr. PODIE2 5, 2632. pdj, PODIE2
Wu, H., Kramer, M. J., Dennis, K. W., and McCallum, R. W. (1997). “Effect of oxygen partial pressure on the lower solubility limit of Nd1+xBa2−xCu3O7,Physica C PHYCE6 290, 252264. phc, PHYCE6
Young, R. A. (1995). The Rietveld Method (Oxford University Press, Oxford).

Crystal structures and reference diffraction patterns of BaSrR4O8

  • W. Wong-Ng (a1), J. A. Kaduk (a2) and J. Dillingham (a3)


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