Publications

Displaying 1 - 25 of 65

A Combined Fit of Total Scattering and Extended X-ray Absorption Fine Structure Data for Local-Structure Determination in Crystalline Materials

October 5, 2009

Author(s)

Igor Levin, Victor L. Krayzman, Joseph C. Woicik, Terrell A. Vanderah, M. G. Tucker, Thomas Proffen

Reverse Monte Carlo (RMC) refinements of local structure using a simultaneous fit of x-ray/neutron total scattering and EXAFS data were developed to incorporate

Workshop on Measurement Needs for Local-Structure Determination in Inorganic Materials

November 8, 2008

Author(s)

Igor Levin, Terrell A. Vanderah

The functional responses (e.g. dielectric, magnetic, catalytic, etc) of many industrially-relevant materials are controlled by their local structure a term that

Stability Phase-Fields in the and Pyrochlore Formation in Sections of the Bi₂O₃-Al₂O_3-Nb₂O₅

May 8, 2008

Author(s)

Terrell A. Vanderah, Jorge T. Guzman, Juan C. Nino

Bismuth niobate-based ceramic materials are of interest for embedded elements such as capacitors, resonators, and filters because they exhibit high relative

Pyrochlore Formation, Phase Relations, and Properties in the CaO-TiO₂-(Nb,Ta)₂O₅ Systems

April 23, 2008

Author(s)

Terrell A. Vanderah, Robert S. Roth, I E. Grey, W G. Mumme, P Bordet, Juan C. Nino

Ceramic dielectric materials based on complex titanates, niobates, and tantalates are important for a variety of components in communications systems. As part

Crystal Structure, Stoichiometry, and Dielectric Relaxation in Bi_3.32Nb_7.09O_22.7 and Structurally Related Ternary Phases

April 17, 2008

Author(s)

I E. Grey, Terrell A. Vanderah, W G. Mumme, Robert S. Roth, Jorge T. Guzman, Juan C. Nino, Igor Levin

Ceramic materials which exhibit high relative dielectric permittivities and are processible at temperatures in the 1000 C to 1200 C range are of interest for

Crystal Structure, Magnetic, and Dielectric Properties of Aurivillius-Type Bi₃Fe_0.5Nb_1.5O₉

October 28, 2007

Author(s)

M W. Lufaso, W A. Schulze, L Misture, Terrell A. Vanderah

Bi3Fe0.5Nb1.5O9 was synthesized using conventional solid state techniques and its crystal structure refined by the Rietveld method using neutron powder

Dielectric and Multifunctional Ceramics Research at NIST

October 18, 2007

Author(s)

Terrell A. Vanderah

Crystal Structure, Magnetic, and Dielectric Properties of Aurivillius-type Bi3Fe0.5Nb1.5O9

October 1, 2007

Author(s)

M W. Lufaso, W A. Schulze, S T. Misture, Terrell A. Vanderah

Contrasting oxide crystal chemistry of Nb and Ta. The structures of the hexagonal bronzes BaTa2O6 and Ba0.93Nb2.03O6

September 1, 2007

Author(s)

W G. Mumme, Ian E. Grey, Robert S. Roth, Terrell A. Vanderah

Contrasting Oxide Crystal Chemistry of Nb and Ta. The Structures of the Hexagonal Bronzes BaTa₂O₆ and Ba_0.93Nb₂.03^O₆

March 22, 2007

Author(s)

W G. Mumme, I E. Grey, Robert S. Roth, Terrell A. Vanderah

The crystal structures of the title phases have been determined as part of a general study of the photoelectrochemical activities of niobates and tantalates

Pyrochlore Formation, Phase Relations, and Properties in the CaO-TiO2-(Nb,Ta)2O5 Systems

March 1, 2007

Author(s)

Terrell A. Vanderah, Robert S. Roth, Ian E. Grey, W G. Mumme, P Bordet, J C. Ninod

Chemical Twinning of the Pyrochlore Structure in the System Bi₂O_3-Nb2O₅

January 28, 2007

Author(s)

Ian E. Grey, W G. Mumme, Terrell A. Vanderah, Robert S. Roth, C Bougerol-Chaillout

New ternary bismuth iron niobates having structures based on chemical twinning of pyrochlore are described. Bi5.67Nb10FeO35 has hexagonal symmetry, P63/mmc, a =

Chemical twinning of the pyrochlore structure structure in the system Bi2O3-Fe2O3-Nb2O5

January 1, 2007

Author(s)

Ian E. Grey, W G. Mumme, Terrell A. Vanderah, Robert S. Roth, C Bougerol

Phase Formation and Properties in the Magnetic Dielectric System Bi2O 3:2CoO 1+x::Nb2 O5

December 4, 2006

Author(s)

Terrell A. Vanderah, T Siegrist, M W. Lufaso, C Yeager, Juan C. Nino, S Yates

Phase Formation, Crystal Chemistry, and Properties in the Magnetic Dielectric System Bi2O3-Fe2O3-Nb2O5

December 1, 2006

Author(s)

M W. Lufaso, Terrell A. Vanderah, I M. Pazos, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth

Subsolidus Phase Equilibria and Properties in the Magnetic Dielectric System Bi2O3:Mn2O3+x:Nb2O5

November 1, 2006

Author(s)

Terrell A. Vanderah, M W. Lufaso, A U. Adler, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth

Phase Formation and Properties in the System Bi2O 3:2CoO 1+x:Nb2O5

September 13, 2006

Author(s)

Terrell A. Vanderah, T Siegrist, M W. Lufaso, C Yeager, Juan C. Nino, S Yates, Robert S. Roth

Subsolidus phase relations have been determined for the Bi-Co-Nb-O system in air (750 C to 925 C). Ternary compound formation was limited to pyrochlore (A2B 2O

Subsolidus Phase Equilibria and Properties in the Magnetic Dielectric System Bi₂O₃:Mn₂O_3+x:Nb₂O₅

July 20, 2006

Author(s)

Terrell A. Vanderah, M W. Lufaso, A U. Adler, Igor Levin, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth

Subsolidus phase relations have been determined for the Bi-Mn-Nb-O system in air (750-900 C). Phases containing Mn2+, Mn3+, and Mn4+ were all observed. Ternary

Phase Formation, Crystal Chemistry, and Properties in the Magnetic Dielectric System Bi₂O_3-Fe₂O_3-Nb₂O₅

June 22, 2006

Author(s)

M W. Lufaso, Terrell A. Vanderah, I M. Pazos, Igor Levin, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth

Subsolidus phase relations have been determined for the Bi2O3-Fe2O3-Nb2O5 system in air (900-1075 C). Three new ternary phases were observed Bi3Fe0.5Nb1.5O9

Comparative Phase Equilibria in the Bi₂O₃-MO_x-Nb₂O₅ Systems (MO_x=Mn₂O₃, Fe₂O₃, Co₃O₄, ZnO)

November 30, 2005

Author(s)

Terrell A. Vanderah, M W. Lufaso, A U. Adler, I M. Pazos, S M. Bell

Phase equilibrium studies of the title systems all reveal the formation of non-stoichiometric, displacively disordered pyrochlore phases. Formation of other

Comparative Phase Equilibria in the Bi2O3-MOx-Nb2O5 Systems (MOx=Mn2O3, Fe2O3, Co3O4, ZnO)

November 23, 2005

Author(s)

Terrell A. Vanderah, M W. Lufaso, A U. Adler, I M. Pazos, S M. Bell

An Unexpected Crystal-Chemical Principle for the Pyrochlore Structure

July 18, 2005

Author(s)

Terrell A. Vanderah, M W. Lufaso

Structural Behavior and Raman Spectra of Perovskite-Like Solid Solutions (1-x)LaMg_0.5Ti_0.5O_3-xLa_2/3TiO^d3

June 14, 2005

Author(s)

Igor Levin, Terrell A. Vanderah, T Amos, James E. Maslar

Structural behavior and phase transitions in the A-cation deficient perovskite-like solid solutions (1-x)LaMg0.5Ti0.5O3-xLa2/3TiO3 (0=x=0.5) were studied using

Experimental Determination of Phase Equilibria Diagrams in Ceramic Systems

June 1, 2004

Author(s)

Robert S. Roth, Terrell A. Vanderah

Phase Relations, Crystal Chemistry, and Dielectric Properties in Sections of the La₂O₃-CaO- MgO-TiO₂ System

June 1, 2004

Author(s)

Terrell A. Vanderah, V L. Miller, Igor Levin, S M. Bell, T Negas

Subsolidus phase equilibria, crystal chemistry, and dielectric behavior were studied for the La2O3 MgO TiO2 system and for the ternary sections LaMg1/2Ti1/2O3

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