Structure refinement of CaO·6Al2O3

Utsunomiya, Atsushi; Tanaka, Katsufumi; Morikawa, Hideki; Μarumo, F.; Kojima, H.

doi:10.1016/0022-4596(88)90317-9

Cited by 121 publications

(77 citation statements)

References 13 publications

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“…S2 and Table S2 in SI). The refined isotropic displacement on the calcium site is 0.010(2)10 -2 nm 2 , which is comparable to that reported for MP-type CaAl 12 O 19 [13] and other oxides [34,35]. The bond lengths around lanthanum and calcium sites are summarized in Table 2.…”

Section: Eu Site Splitting In Mp-type Oxynitride Host Structuresupporting

confidence: 75%

“…structure. The refinement showed a good fit with the structural model without calcium site splitting, as reported in Refs [13,14] (see Fig. S2 and Table S2 in SI).…”

Section: Eu Site Splitting In Mp-type Oxynitride Host Structuresupporting

confidence: 72%

“…S2. The crystal structure of La 0.97 Eu 0.03 Al 12 (O,N) 19 was refined in the MP structure starting from the crystallographic parameters of CaAl 12 O 19 [13]. Structure refinement as aluminum oxide not as oxynitride did not converge into reasonable structural parameters.…”

Section: Eu Site Splitting In Mp-type Oxynitride Host Structurementioning

confidence: 99%

“…Large cations such as Ba 2+ occupy the nine-fold coordination sites in the intermediate layer of the β-alumina structure. Small cations, such as Sr 2+ or Ca 2+ , are located in the twelve coordination sites of the MP structure in aluminum oxide [13,14]. A Eu-doped compound was also prepared using barium aluminum oxynitride with β-alumina structure and its emission efficiency was compared with aluminum oxide [15].…”

Section: Introductionmentioning

confidence: 99%

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Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting

Masubuchi

Hata

Motohashi

et al. 2011

Journal of Solid State Chemistry

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Eu-doped lanthanum aluminum oxynitride (LaAl 12 (O,N) 19 ) with magnetoplumbite structure was prepared by nitridation of the oxide precursor obtained from aluminum glycine gel and subsequent post-annealing. Eu-doped lanthanum aluminum oxynitride exhibited blue light emission at 440 nm with a shoulder at 464 nm under excitation at 254 nm.Isostructural Eu-doped calcium aluminum oxide (CaAl 12 O 19 ) exhibited a single emission peak at 415 nm. Structural refinement using neutron powder diffraction indicated that the lanthanum site occupied partially by Eu 2+ splits into 2d and 6h sites in the aluminum oxynitride. The longer emission and the shoulder peak in the former aluminum oxynitride were observed in relation to the increasing covalency as well as crystal field splitting around doped Eu 2+ induced by site splitting involved with the two kinds of anions.

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Section: Eu Site Splitting In Mp-type Oxynitride Host Structuresupporting

confidence: 75%

“…structure. The refinement showed a good fit with the structural model without calcium site splitting, as reported in Refs [13,14] (see Fig. S2 and Table S2 in SI).…”

Section: Eu Site Splitting In Mp-type Oxynitride Host Structuresupporting

confidence: 72%

Section: Eu Site Splitting In Mp-type Oxynitride Host Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crystal structure of Eu-doped magnetoplumbite-type lanthanum aluminum oxynitride with emission site splitting

Masubuchi

Hata

Motohashi

et al. 2011

Journal of Solid State Chemistry

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“…8) Figure 1 shows the crystal structure of CaAl12O19 along [010] view direction. The unit cell contains two chemical formulas of CaAl12O19 like M-type ferrite.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and magnetic properties of Fe substituted hibonite

et al. 2017

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We have investigated the synthesis conditions and magnetic properties of Fe substituted hibonite with initial compositions of CaAl12-xFexO19 (0≤x≤12) and CaAl10-xFexO19- (0≤x≤10). The Fe doped hibonite can be synthesized at a sintering temperature of 1300˚C. The Xray diffraction patterns of Fe substituted hibonite samples are in good agreement with the pattern of hibonite. The lattice parameter increased due to the difference between the radius of Al 3+ and that of Fe 3+ . The magnetization and Curie temperature of the best sample (CaAl2Fe8O19- ) are 31 emu/g and 290˚C, respectively.

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