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High-temperature structural disorders stabilize hydrous aluminosilicates in the mantle transition zone

Author

Listed:
  • Baoyun Wang

    (Lanzhou University)

  • Jin Liu

    (Yanshan University)

  • Yanyao Zhang

    (Stanford University)

  • Baisheng Nie

    (Chongqing University)

  • Wei Yang

    (Chinese Academy of Sciences)

  • Jialong Hao

    (Chinese Academy of Sciences)

  • Xing Ding

    (Chinese Academy of Sciences)

  • Yongjun Tian

    (Yanshan University)

Abstract

Hydrous aluminosilicates are important deep water-carriers in sediments subducting into the deep mantle. To date, it remains enigmatic how hydrous aluminosilicates withstand extremely high temperatures in the mantle transition zone. Here we systematically investigate the crystal structures and chemical compositions of typical hydrous aluminosilicates using single-crystal X-ray diffraction, electron probe microanalyzer, and nanoscale secondary ion mass spectrometry. These single crystals are synthesized at 15.5–22.0 GPa and 1400–1700 °C, featuring pervasive structural disorders. In particular, Al and Si atoms extensively occupy new tetrahedral and octahedral sites that are nominally vacant in their ordered counterparts. High temperature activates disorders leading to variable local crystal structures and more hydrogen incorporation into the crystal structure. This result suggests that the order-to-disorder transition holds the key to the high thermal stability of hydrous aluminosilicates, significantly affecting the water cycle in the deep mantle.

Suggested Citation

  • Baoyun Wang & Jin Liu & Yanyao Zhang & Baisheng Nie & Wei Yang & Jialong Hao & Xing Ding & Yongjun Tian, 2025. "High-temperature structural disorders stabilize hydrous aluminosilicates in the mantle transition zone," Nature Communications, Nature, vol. 16(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56312-z
    DOI: 10.1038/s41467-025-56312-z
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    References listed on IDEAS

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    1. Sarah E. Mazza & Esteban Gazel & Michael Bizimis & Robert Moucha & Paul Béguelin & Elizabeth A. Johnson & Ryan J. McAleer & Alexander V. Sobolev, 2019. "Author Correction: Sampling the volatile-rich transition zone beneath Bermuda," Nature, Nature, vol. 571(7765), pages 9-9, July.
    2. Sarah E. Mazza & Esteban Gazel & Michael Bizimis & Robert Moucha & Paul Béguelin & Elizabeth A. Johnson & Ryan J. McAleer & Alexander V. Sobolev, 2019. "Sampling the volatile-rich transition zone beneath Bermuda," Nature, Nature, vol. 569(7756), pages 398-403, May.
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