Mechanochemical synthesis of LaOX (X=Cl, Br) and their solid state solutions

Jaeryeong Lee; Kibu Chiyo; Fumio Saito

doi:10.1006/jssc.2001.9276

Mechanochemical synthesis of LaOX (X=Cl, Br) and their solid state solutions

Jaeryeong Lee, Kibu Chiyo, Fumio Saito

Division of Process and System Engineering

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

51 Citations (Scopus)

Abstract

A mixture of lanthanum oxide (La₂O₃), chloride (LaCl₃), and bromide (LaBr₃) was ground in air by a planetary ball mill to investigate synthesis of lanthanum oxychloride (LaOCl), oxybromide (LaOBr), and their solid solutions, LaOCl_1-xBr_x (0≤x≤1, Δx=0.25). The synthesizing reactions proceed with an increase in grinding time. Unit cell dimensions, a, c, and lattice volume of the solutions evolve linearly with an increase in x in the LaOCl_1-xBr_x series. Comparing unit cell dimensions of LaOX synthesized by mechanochemical reaction to those of LaOX synthesized by solid-state reaction at high temperature, there is no difference in the length of c, while a is shortened slightly. This may be attributed to the complex cation layer of (LaO)_nⁿ⁺, with a close relationship to a of the cell dimensions, being affected by the intensive grinding.

Original language	English
Pages (from-to)	469-473
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	160
Issue number	2
DOIs	https://doi.org/10.1006/jssc.2001.9276
Publication status	Published - 2001 Jan 1

Keywords

LaOBr
LaOCl
Lattice parameter deviation
Mechanochemical reaction
PbFCl structure

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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10.1006/jssc.2001.9276

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title = "Mechanochemical synthesis of LaOX (X=Cl, Br) and their solid state solutions",

abstract = "A mixture of lanthanum oxide (La2O3), chloride (LaCl3), and bromide (LaBr3) was ground in air by a planetary ball mill to investigate synthesis of lanthanum oxychloride (LaOCl), oxybromide (LaOBr), and their solid solutions, LaOCl1-xBrx (0≤x≤1, Δx=0.25). The synthesizing reactions proceed with an increase in grinding time. Unit cell dimensions, a, c, and lattice volume of the solutions evolve linearly with an increase in x in the LaOCl1-xBrx series. Comparing unit cell dimensions of LaOX synthesized by mechanochemical reaction to those of LaOX synthesized by solid-state reaction at high temperature, there is no difference in the length of c, while a is shortened slightly. This may be attributed to the complex cation layer of (LaO)nn+, with a close relationship to a of the cell dimensions, being affected by the intensive grinding.",

keywords = "LaOBr, LaOCl, Lattice parameter deviation, Mechanochemical reaction, PbFCl structure",

author = "Jaeryeong Lee and Kibu Chiyo and Fumio Saito",

year = "2001",

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doi = "10.1006/jssc.2001.9276",

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journal = "Journal of Solid State Chemistry",

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AU - Lee, Jaeryeong

AU - Chiyo, Kibu

AU - Saito, Fumio

PY - 2001/1/1

Y1 - 2001/1/1

N2 - A mixture of lanthanum oxide (La2O3), chloride (LaCl3), and bromide (LaBr3) was ground in air by a planetary ball mill to investigate synthesis of lanthanum oxychloride (LaOCl), oxybromide (LaOBr), and their solid solutions, LaOCl1-xBrx (0≤x≤1, Δx=0.25). The synthesizing reactions proceed with an increase in grinding time. Unit cell dimensions, a, c, and lattice volume of the solutions evolve linearly with an increase in x in the LaOCl1-xBrx series. Comparing unit cell dimensions of LaOX synthesized by mechanochemical reaction to those of LaOX synthesized by solid-state reaction at high temperature, there is no difference in the length of c, while a is shortened slightly. This may be attributed to the complex cation layer of (LaO)nn+, with a close relationship to a of the cell dimensions, being affected by the intensive grinding.

AB - A mixture of lanthanum oxide (La2O3), chloride (LaCl3), and bromide (LaBr3) was ground in air by a planetary ball mill to investigate synthesis of lanthanum oxychloride (LaOCl), oxybromide (LaOBr), and their solid solutions, LaOCl1-xBrx (0≤x≤1, Δx=0.25). The synthesizing reactions proceed with an increase in grinding time. Unit cell dimensions, a, c, and lattice volume of the solutions evolve linearly with an increase in x in the LaOCl1-xBrx series. Comparing unit cell dimensions of LaOX synthesized by mechanochemical reaction to those of LaOX synthesized by solid-state reaction at high temperature, there is no difference in the length of c, while a is shortened slightly. This may be attributed to the complex cation layer of (LaO)nn+, with a close relationship to a of the cell dimensions, being affected by the intensive grinding.

KW - LaOBr

KW - LaOCl

KW - Lattice parameter deviation

KW - Mechanochemical reaction

KW - PbFCl structure

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