Order-disorder (OD) polytypism of K₃FeTe₂O₈(OH)₂(H₂O)₁₊ₓ

Wolflehner, Tobias; Stöger, Berthold

doi:10.1107/S2052520623009162

Record link:

http://hdl.handle.net/20.500.12708/190371

Title:

Order-disorder (OD) polytypism of K₃FeTe₂O₈(OH)₂(H₂O)₁₊ₓ

Citation:

Wolflehner, T., & Stöger, B. (2023). Order-disorder (OD) polytypism of K₃FeTe₂O₈(OH)₂(H₂O)₁₊ₓ. Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 79(6), 510–518. https://doi.org/10.1107/S2052520623009162

Publisher DOI:

10.1107/S2052520623009162

CatalogPlus:

AC17205022

Publication Type:

Article - Original Research Article

Language:

English

Authors:

Wolflehner, Tobias
Stöger, Berthold

Organisational Unit:

E057-04 - Fachbereich Röntgenzentrum

Journal:

Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials

Date (published):

Dec-2023

Number of Pages:

Publisher:

IUCr

Peer reviewed:

Yes

Keywords:

OD theory; X-ray diffraction; polytypism; tellurate

Abstract:

K₃FeTe₂O₈(OH)₂(H₂O)₂ was synthesized under hydrothermal conditions from Te(OH)₆, FeSO₄·7H₂O and 85 wt% KOH in a 1:2:6 molar ratio. The crystal structure is built of a triperiodic network. One disordered water molecule per formula unit is located in a channel and can be partially removed by heating. Systematic one-dimensional diffuse scattering indicates a polytypic character, which is best described by application of the order-disorder theory. The major polytype is monoclinic with pseudo-orthorhombic metrics. It is interrupted by fragments of an orthorhombic polytype. The diffraction intensities are analyzed using structure factor calculations.

Research facilities:

Röntgenzentrum

Research Areas:

Materials Characterization: 100%

Science Branch:

1040 - Chemie: 75%
1010 - Mathematik: 25%

License:

CC BY 4.0