Transformation of natural pollucite into hexacelsian under high pressure and temperature

Wooseung Choi; Jinhyuk Choi; Huijeong Hwang; Yongjae Lee

doi:10.1007/s00269-022-01190-w

Transformation of natural pollucite into hexacelsian under high pressure and temperature

Wooseung Choi, Jinhyuk Choi, Huijeong Hwang, Yongjae Lee

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

Abstract

Synchrotron X-ray powder diffraction experiments were performed on natural pollucite to observe its transition into hexacelsian-like phase at high pressure and temperature conditions under water pressure medium. When heated to 100 °C at 1.3(1) GPa, the natural cubic pollucite, (Cs, Na)₁₆Al₁₆Si₁₆O₉₆ (Ia3 ¯ d), transformed to its triclinic phase (P1 ¯) with discontinuous unit cell volume contraction by ca. 4.4%. After further compression to 4.1(1) GPa and heating up to 250 °C, a new hexagonal phase with a hexacelsian framework, Cs_1.28(1)Na_0.44(1)Al_1.72(1)Si_6.28(1)O₁₆ (P6₃/mcm, (Cs, Na)-HEX), formed with unit cell volume contraction by ca. 6.1% based on 96 oxygen atoms of the framework (O_f). The structural model of the newly formed hexacelsian-like phase, (Cs, Na)-HEX, was refined by the Rietveld method to show the disordered distribution of cesium and sodium cations between the double six-membered rings (D6R). Further details of the (Cs, Na)-HEX model are compared to those of the natural Ba-hexacelsian (Ba-HEX) and synthetic Cs-hexacelsian (Cs-HEX).

Original language	English
Article number	15
Journal	Physics and Chemistry of Minerals
Volume	49
Issue number	5
DOIs	https://doi.org/10.1007/s00269-022-01190-w
Publication status	Published - 2022 May

Bibliographical note

Funding Information:
The X-ray experiment was performed at the beamline 10C at PLS-II funded by the Korean Ministry of Science and ICT (MSIT). This work was supported by the Leader Researcher program (NRF‐2018R1A3B1052042) of MSIT.

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Geochemistry and Petrology

Access to Document

10.1007/s00269-022-01190-w

Cite this

@article{f00138ba8cbb4b15a3fdaea80deb019b,

title = "Transformation of natural pollucite into hexacelsian under high pressure and temperature",

abstract = "Synchrotron X-ray powder diffraction experiments were performed on natural pollucite to observe its transition into hexacelsian-like phase at high pressure and temperature conditions under water pressure medium. When heated to 100 °C at 1.3(1) GPa, the natural cubic pollucite, (Cs, Na)16Al16Si16O96 (Ia3 ¯ d), transformed to its triclinic phase (P1 ¯) with discontinuous unit cell volume contraction by ca. 4.4%. After further compression to 4.1(1) GPa and heating up to 250 °C, a new hexagonal phase with a hexacelsian framework, Cs1.28(1)Na0.44(1)Al1.72(1)Si6.28(1)O16 (P63/mcm, (Cs, Na)-HEX), formed with unit cell volume contraction by ca. 6.1% based on 96 oxygen atoms of the framework (Of). The structural model of the newly formed hexacelsian-like phase, (Cs, Na)-HEX, was refined by the Rietveld method to show the disordered distribution of cesium and sodium cations between the double six-membered rings (D6R). Further details of the (Cs, Na)-HEX model are compared to those of the natural Ba-hexacelsian (Ba-HEX) and synthetic Cs-hexacelsian (Cs-HEX).",

author = "Wooseung Choi and Jinhyuk Choi and Huijeong Hwang and Yongjae Lee",

note = "Funding Information: The X-ray experiment was performed at the beamline 10C at PLS-II funded by the Korean Ministry of Science and ICT (MSIT). This work was supported by the Leader Researcher program (NRF‐2018R1A3B1052042) of MSIT. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2022",

month = may,

doi = "10.1007/s00269-022-01190-w",

language = "English",

volume = "49",

journal = "Physics and Chemistry of Minerals",

issn = "0342-1791",

publisher = "Springer Verlag",

number = "5",

}

TY - JOUR

T1 - Transformation of natural pollucite into hexacelsian under high pressure and temperature

AU - Choi, Wooseung

AU - Choi, Jinhyuk

AU - Hwang, Huijeong

AU - Lee, Yongjae

N1 - Funding Information: The X-ray experiment was performed at the beamline 10C at PLS-II funded by the Korean Ministry of Science and ICT (MSIT). This work was supported by the Leader Researcher program (NRF‐2018R1A3B1052042) of MSIT. Publisher Copyright: © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2022/5

Y1 - 2022/5

N2 - Synchrotron X-ray powder diffraction experiments were performed on natural pollucite to observe its transition into hexacelsian-like phase at high pressure and temperature conditions under water pressure medium. When heated to 100 °C at 1.3(1) GPa, the natural cubic pollucite, (Cs, Na)16Al16Si16O96 (Ia3 ¯ d), transformed to its triclinic phase (P1 ¯) with discontinuous unit cell volume contraction by ca. 4.4%. After further compression to 4.1(1) GPa and heating up to 250 °C, a new hexagonal phase with a hexacelsian framework, Cs1.28(1)Na0.44(1)Al1.72(1)Si6.28(1)O16 (P63/mcm, (Cs, Na)-HEX), formed with unit cell volume contraction by ca. 6.1% based on 96 oxygen atoms of the framework (Of). The structural model of the newly formed hexacelsian-like phase, (Cs, Na)-HEX, was refined by the Rietveld method to show the disordered distribution of cesium and sodium cations between the double six-membered rings (D6R). Further details of the (Cs, Na)-HEX model are compared to those of the natural Ba-hexacelsian (Ba-HEX) and synthetic Cs-hexacelsian (Cs-HEX).

AB - Synchrotron X-ray powder diffraction experiments were performed on natural pollucite to observe its transition into hexacelsian-like phase at high pressure and temperature conditions under water pressure medium. When heated to 100 °C at 1.3(1) GPa, the natural cubic pollucite, (Cs, Na)16Al16Si16O96 (Ia3 ¯ d), transformed to its triclinic phase (P1 ¯) with discontinuous unit cell volume contraction by ca. 4.4%. After further compression to 4.1(1) GPa and heating up to 250 °C, a new hexagonal phase with a hexacelsian framework, Cs1.28(1)Na0.44(1)Al1.72(1)Si6.28(1)O16 (P63/mcm, (Cs, Na)-HEX), formed with unit cell volume contraction by ca. 6.1% based on 96 oxygen atoms of the framework (Of). The structural model of the newly formed hexacelsian-like phase, (Cs, Na)-HEX, was refined by the Rietveld method to show the disordered distribution of cesium and sodium cations between the double six-membered rings (D6R). Further details of the (Cs, Na)-HEX model are compared to those of the natural Ba-hexacelsian (Ba-HEX) and synthetic Cs-hexacelsian (Cs-HEX).

UR - http://www.scopus.com/inward/record.url?scp=85129601079&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85129601079&partnerID=8YFLogxK

U2 - 10.1007/s00269-022-01190-w

DO - 10.1007/s00269-022-01190-w

M3 - Article

AN - SCOPUS:85129601079

SN - 0342-1791

VL - 49

JO - Physics and Chemistry of Minerals

JF - Physics and Chemistry of Minerals

IS - 5

M1 - 15

ER -

Transformation of natural pollucite into hexacelsian under high pressure and temperature

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this