Formation conditions for a pyrochlore structure with two different cations at the A site

Naoki Wakiya; Atsushi Saiki; Nobuo Kieda; Kazuo Shinozaki; Nobuyasu Mizutani

doi:10.1016/0022-4596(92)90202-7

Formation conditions for a pyrochlore structure with two different cations at the A site

Naoki Wakiya, Atsushi Saiki, Nobuo Kieda, Kazuo Shinozaki, Nobuyasu Mizutani^*

^*Corresponding author for this work

Materials Design and Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Upon consideration of the crystallographic features of pyrochlore-type compounds, the following two new conditions are proposed for the formation of a mixed cation type at the A site:Δd (A²⁺{single bond}O_I) = d (A²⁺{single bond}O_I) - (r_A + r_O) > 0 and Δd (A⁴⁺{single bond}O_II) = d (A⁴⁺{single bond}O_II) - (r_A + r_O) < 0. Applying these two conditions, three new compounds (Sr, Ce)₂Sn₂O₇, (Cd,Ce)₂Sn₂O₇, and (Ca,Ce)₂Hf₂O₇, are synthesized. However, they are not phase-pure. Although these conditions are prerequisites, they will serve as a guide for designing new compounds of this structure.

Original language	English
Pages (from-to)	71-76
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	101
Issue number	1
DOIs	https://doi.org/10.1016/0022-4596(92)90202-7
State	Published - 1992/11

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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title = "Formation conditions for a pyrochlore structure with two different cations at the A site",

abstract = "Upon consideration of the crystallographic features of pyrochlore-type compounds, the following two new conditions are proposed for the formation of a mixed cation type at the A site:Δd (A2+{single bond}OI) = d (A2+{single bond}OI) - (rA + rO) > 0 and Δd (A4+{single bond}OII) = d (A4+{single bond}OII) - (rA + rO) < 0. Applying these two conditions, three new compounds (Sr, Ce)2Sn2O7, (Cd,Ce)2Sn2O7, and (Ca,Ce)2Hf2O7, are synthesized. However, they are not phase-pure. Although these conditions are prerequisites, they will serve as a guide for designing new compounds of this structure.",

author = "Naoki Wakiya and Atsushi Saiki and Nobuo Kieda and Kazuo Shinozaki and Nobuyasu Mizutani",

year = "1992",

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journal = "Journal of Solid State Chemistry",

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T1 - Formation conditions for a pyrochlore structure with two different cations at the A site

AU - Wakiya, Naoki

AU - Saiki, Atsushi

AU - Kieda, Nobuo

AU - Shinozaki, Kazuo

AU - Mizutani, Nobuyasu

PY - 1992/11

Y1 - 1992/11

N2 - Upon consideration of the crystallographic features of pyrochlore-type compounds, the following two new conditions are proposed for the formation of a mixed cation type at the A site:Δd (A2+{single bond}OI) = d (A2+{single bond}OI) - (rA + rO) > 0 and Δd (A4+{single bond}OII) = d (A4+{single bond}OII) - (rA + rO) < 0. Applying these two conditions, three new compounds (Sr, Ce)2Sn2O7, (Cd,Ce)2Sn2O7, and (Ca,Ce)2Hf2O7, are synthesized. However, they are not phase-pure. Although these conditions are prerequisites, they will serve as a guide for designing new compounds of this structure.

AB - Upon consideration of the crystallographic features of pyrochlore-type compounds, the following two new conditions are proposed for the formation of a mixed cation type at the A site:Δd (A2+{single bond}OI) = d (A2+{single bond}OI) - (rA + rO) > 0 and Δd (A4+{single bond}OII) = d (A4+{single bond}OII) - (rA + rO) < 0. Applying these two conditions, three new compounds (Sr, Ce)2Sn2O7, (Cd,Ce)2Sn2O7, and (Ca,Ce)2Hf2O7, are synthesized. However, they are not phase-pure. Although these conditions are prerequisites, they will serve as a guide for designing new compounds of this structure.

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U2 - 10.1016/0022-4596(92)90202-7

DO - 10.1016/0022-4596(92)90202-7

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EP - 76

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 1

ER -

Formation conditions for a pyrochlore structure with two different cations at the A site

Abstract

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