Pakhomova, Anna S.; Armbruster, Thomas Michael; Krivovichev, Sergey V.; Yakovenchuk, Victor N. (2014). Dehydration of the zeolite merlinoite from the Khibiny massif, Russia: an <I>in situ</I> temperature-dependent single-crystal X-ray study. European journal of mineralogy, 26(3), pp. 371-380. E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller) 10.1127/0935-1221/2014/0026-2380
Full text not available from this repository.Dehydration behaviour of the zeolite merlinoite, NaK11[Al12Si20O64]·15H2O, from the Khibiny massif (Russia) was studied by means of single-crystal X-ray diffraction conjoined with step-wise heating to 225 C. At room temperature merlinoite has the space group Immm with a = 14.0312(5), b = 14.2675(6), c = 10.0874(4) Å, and V = 2019.40(14) Å3. At 75 °C the merlinoite structure undergoes pronounced dehydration accompanied by a phase transition to a structure that has the space group P42/nmc and remains consistent at elevated temperature. A fully dehydrated phase occurs at 200 °C (at 225 °C: a = 13.341(4), b = 13.341(4), c = 9.707(4) Å, V = 1727.7(12) Å3). Dehydration-induced framework distortion and symmetry were found to be different from those observed for synthetic potassium merlinoite with the K11.5[Al11.5Si20.5O64]·15H2O composition.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Geological Sciences |
UniBE Contributor: |
Armbruster, Thomas Michael |
Subjects: |
500 Science > 550 Earth sciences & geology |
ISSN: |
0935-1221 |
Publisher: |
E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller) |
Language: |
English |
Submitter: |
Sarah Antenen |
Date Deposited: |
11 Aug 2015 15:21 |
Last Modified: |
05 Dec 2022 14:48 |
Publisher DOI: |
10.1127/0935-1221/2014/0026-2380 |
URI: |
https://boris.unibe.ch/id/eprint/70754 |
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