Rietveld analysis software for J-PARC

Oishi, Ryozo; Yonemura, Masao; Nishimaki, Y.; Torii, Shuki; Hoshikawa, Akinori; Ishigaki, Tōru; Morishima, Takahiro; Mori, Keiko; Kamiyama, Takashi

doi:10.1016/j.nima.2008.11.056

Cited by 470 publications

(284 citation statements)

References 7 publications

Supporting

Mentioning

281

Contrasting

Order By: Relevance

“…For both measurements X-ray generator was used by Cu-Kα radiation and applied 40 kV and 30 mA, and 2θ region covered from 10° to 90° by 0.02° steps. All crystal structure analysis by Rietveld method was performed using Z-Rietveld, version 0.9.42.4 [11,12]. Profile function is setting by Type A-1, and asymmetry parameters are used as the axial divergence model according to Finger-Cox-Jephcoat [13].…”

Section: Experimental and Data Analysismentioning

confidence: 99%

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction

Ishikawa¹,

Danilkin²,

Avdeev³

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

View full text Add to dashboard Cite

Thermal expansion property of Silver(I)-Oxide (Ag 2 O) was structurally investigated by neutron powder diffraction from 3 K to 400 K, and measured by X-ray powder diffraction from 20 K to 498 K. Temperature dependency of lattice parameter by neutron diffraction indicates the negative thermal expansion (NTE) below room temperature, and it changes to positive thermal expansion (PTE) from 300 K to 400 K. And this result is consistent with X-ray diffraction and TMA measurement. Moreover, the result by X-ray diffraction shows that lattice parameter significantly decreases above 400 K. Since the result by TG measurement shows the mass loss remarkably in this temperature region, it is considered that decreasing lattice parameter above 400 K is caused from thermal decomposition.

show abstract

Section: Experimental and Data Analysismentioning

confidence: 99%

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction

Ishikawa¹,

Danilkin²,

Avdeev³

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

View full text Add to dashboard Cite

show abstract

“…Rietveld refinements for TOF powder ND data were performed using the program Z-Rietveld. 22), 23) The ND data between 0.275 and 0.290 nm were excluded from the Rietveld refinements, because extra peaks (originate from the second shots of fast neutron passing through disk-choppers) appeared in this data range in the wide-d mode measurements.…”

Section: Introductionmentioning

confidence: 99%

Relationship between crystal structure and oxide-ion conduction in Ln2Zr2O7 (Ln = Eu, Nd and La) system deduced by neutron and X-ray diffraction

Hagiwara

Yamamura

Nomura

et al. 2013

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Crystal structures of the Ln 2 Zr 2 O 7 (Ln = Nd and La) were refined by the Rietveld analysis of powder neutron diffraction (ND) data at room temperature. La 2 Zr 2 O 7 had a pyrochlore (P)-type structure of almost completely ordered for oxygen vacancy. On the other hand, Nd 2 Zr 2 O 7 had the P-type structure for the oxygen vacancy distributed between the O2 (8b) and O3 (48f ) sites. The Rietveld refinement results of powder X-ray diffraction (XRD) data of Ln 2 Zr 2 O 7 (Ln = Eu, Nd and La) indicated that the Ln 3+ and Zr 4+ ions exist in ordered states in 16c and 16d sites, respectively. The refined lattice parameters (a), occupancies (g) for oxygen sites (O1, O2 and O3) and x-positional parameters for O3 (48f ) site of La 2 Zr 2 O 7 and Nd 2 Zr 2 O 7 by using powder XRD data were in almost agreement with those by using powder ND data. The refined ND and XRD data of Ln 2 Zr 2 O 7 (Ln = Eu, Nd and La) system revealed that the O3 (48f ) site occupancy (g 48f ) decreases with increasing O2 (8b) site occupancy, while O1 (8a) site occupancy keeping 1.0. The change in oxide-ion conductivity (·) in Ln 2 Zr 2 O 7 (Ln = Eu, Nd and La) system can be related to a change in the product of site occupancy (g 48f ) and the oxygen vacancy rate (1-g 48f ) in the O3 (48f ) site, g 48f (1-g 48f ).

show abstract

“…Rietveld refinements were performed using the program Z-Rietveld ver. 0.9.31 for time-of-flight neutron powder diffraction analyses [12].…”

Section: Methodsmentioning

confidence: 99%

Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations

Mamiya¹,

Terada²,

Kitazawa³

et al. 2011

Journal of Magnetics

Self Cite

View full text Add to dashboard Cite

Magnetic properties of highly zinc-substituted manganese ferrites are discussed on the basis of cation distribution. High throughput neutron powder diffractometry indicates that the prepared samples possess a nearly normal spinel structure, where the substitution of nonmagnetic zinc ions mainly causes the dilution of magnetic ions in the A-sublattice and consequently affects bond-randomness in the B-sublattice. On the other hand, the estimated occupancy of manganese ions in the B site indicates that random anisotropy effects due to local Jahn-Teller distortions gradually weaken with the substitution. Bulk magnetometry indicates that the substitution smears the transition from a paramagnetic phase to a soft-magnetic phase. Furthermore, at lower temperatures, such a soft-magnetic phase is destabilized and a magnetic glassy state appears. These features of the magnetic properties of dilute spinel ferrites are discussed from the viewpoint of the above-mentioned various types of disorders.

show abstract

Rietveld analysis software for J-PARC

Cited by 470 publications

References 7 publications

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction

Relationship between crystal structure and oxide-ion conduction in <i>Ln</i><sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (<i>Ln</i> = Eu, Nd and La) system deduced by neutron and X-ray diffraction

Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations

Contact Info

Product

Resources

About

Rietveld analysis software for J-PARC

Cited by 470 publications

References 7 publications

Thermal Expansion Properties of Ag2O Crystal Structure by Powder Neutron Diffraction

Thermal Expansion Properties of Ag2O Crystal Structure by Powder Neutron Diffraction

Relationship between crystal structure and oxide-ion conduction in <i>Ln</i><sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (<i>Ln</i> = Eu, Nd and La) system deduced by neutron and X-ray diffraction

Structural and Magnetic Properties of Dilute Spinel Ferrites: Neutron Diffractometry and Magnetometry Investigations

Contact Info

Product

Resources

About

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction

Thermal Expansion Properties of Ag₂O Crystal Structure by Powder Neutron Diffraction