Pure Na-4-mica: Synthesis and characterization

Man Park; Dong Hoon Lee; Choong Lyeal Choi; Sang Soo Kim; Kwang Seop Kim; Jyung Choi

doi:10.1021/cm0116267

Pure Na-4-mica: Synthesis and characterization

Man Park, Dong Hoon Lee, Choong Lyeal Choi, Sang Soo Kim, Kwang Seop Kim, Jyung Choi

School of Applied Bioscience

Kyungpook National University

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

59 Scopus citations

Abstract

An innovative synthesis method for phase-pure Na-4-mica has been developed in this study. Phase pure Na-4-mica has been synthesized by using NaCl melt. In the newly develope]d method, not only could the postpreparation process be avoided but also the crystal size could be manipulated in the range of about 2-5 μm by the initial molar ratio of Al₂O₃/NaCl. Both the hydrated and anhydrous Na-4-mica phases possess monoclinic crystal systems with the same layer plane. The X-ray diffraction (XRD) patterns exhibited relatively strong h0l peaks along with very strong 00l peaks. Changes in the cell parameters of β and c on hydration-dehydration indicate that the layer swelling is accompanied with a significant parallel displacement of layers. Furthermore, pure Na-4-mica has exhibited completely reversible dehydration-rehydration behavior up to 800°C and extremely high Sr²⁺ uptake capacity without any layer collapse.

Original language	English
Pages (from-to)	2582-2589
Number of pages	8
Journal	Chemistry of Materials
Volume	14
Issue number	6
DOIs	https://doi.org/10.1021/cm0116267
State	Published - 2002

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title = "Pure Na-4-mica: Synthesis and characterization",

abstract = "An innovative synthesis method for phase-pure Na-4-mica has been developed in this study. Phase pure Na-4-mica has been synthesized by using NaCl melt. In the newly develope]d method, not only could the postpreparation process be avoided but also the crystal size could be manipulated in the range of about 2-5 μm by the initial molar ratio of Al2O3/NaCl. Both the hydrated and anhydrous Na-4-mica phases possess monoclinic crystal systems with the same layer plane. The X-ray diffraction (XRD) patterns exhibited relatively strong h0l peaks along with very strong 00l peaks. Changes in the cell parameters of β and c on hydration-dehydration indicate that the layer swelling is accompanied with a significant parallel displacement of layers. Furthermore, pure Na-4-mica has exhibited completely reversible dehydration-rehydration behavior up to 800°C and extremely high Sr2+ uptake capacity without any layer collapse.",

author = "Man Park and Lee, {Dong Hoon} and Choi, {Choong Lyeal} and Kim, {Sang Soo} and Kim, {Kwang Seop} and Jyung Choi",

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doi = "10.1021/cm0116267",

language = "English",

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pages = "2582--2589",

journal = "Chemistry of Materials",

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T1 - Pure Na-4-mica

T2 - Synthesis and characterization

AU - Park, Man

AU - Lee, Dong Hoon

AU - Choi, Choong Lyeal

AU - Kim, Sang Soo

AU - Kim, Kwang Seop

AU - Choi, Jyung

PY - 2002

Y1 - 2002

N2 - An innovative synthesis method for phase-pure Na-4-mica has been developed in this study. Phase pure Na-4-mica has been synthesized by using NaCl melt. In the newly develope]d method, not only could the postpreparation process be avoided but also the crystal size could be manipulated in the range of about 2-5 μm by the initial molar ratio of Al2O3/NaCl. Both the hydrated and anhydrous Na-4-mica phases possess monoclinic crystal systems with the same layer plane. The X-ray diffraction (XRD) patterns exhibited relatively strong h0l peaks along with very strong 00l peaks. Changes in the cell parameters of β and c on hydration-dehydration indicate that the layer swelling is accompanied with a significant parallel displacement of layers. Furthermore, pure Na-4-mica has exhibited completely reversible dehydration-rehydration behavior up to 800°C and extremely high Sr2+ uptake capacity without any layer collapse.

AB - An innovative synthesis method for phase-pure Na-4-mica has been developed in this study. Phase pure Na-4-mica has been synthesized by using NaCl melt. In the newly develope]d method, not only could the postpreparation process be avoided but also the crystal size could be manipulated in the range of about 2-5 μm by the initial molar ratio of Al2O3/NaCl. Both the hydrated and anhydrous Na-4-mica phases possess monoclinic crystal systems with the same layer plane. The X-ray diffraction (XRD) patterns exhibited relatively strong h0l peaks along with very strong 00l peaks. Changes in the cell parameters of β and c on hydration-dehydration indicate that the layer swelling is accompanied with a significant parallel displacement of layers. Furthermore, pure Na-4-mica has exhibited completely reversible dehydration-rehydration behavior up to 800°C and extremely high Sr2+ uptake capacity without any layer collapse.

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JF - Chemistry of Materials

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Pure Na-4-mica: Synthesis and characterization

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