Journal Article

PUBDB-2024-05805

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Study of the Structure of Zn and Na Borophosphate Glasses Using X-ray and Neutron Scattering Techniques

Hoppe, U. (Corresponding author)Extern* ; Freudenberger, P. T. ; Brow, R. K. ; Bednarcik, J.Extern*DESY* ; Hannon, A. C.Extern*

2024
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/solids5030024  doi:10.3204/PUBDB-2024-05805

Abstract: The atomic structures of Zn and Na borophosphate glasses were studied using X-ray and neutron scattering techniques. Peaks assigned to the B−O, P−O, and O−O distances confirm that only BO4 units co-exist with the PO4 tetrahedra. The Zn−O and Na−O coordination numbers are found to be a little larger than four. The narrowest peaks of the Zn−O first-neighbor distances exist for the glasses along a line connecting the Zn(PO$_3$)$_2$ and BPO$_4$ compositions (50 mol% P$_2$O$_5$), which is explained by networks of ZnO$_4$, BO$_4$, and PO$_4$ tetrahedra with twofold coordinated oxygens. The calculated amounts of available oxygen support this interpretation. Broadened peaks occur for glasses with lower P$_2$O$_5$ contents, which is consistent with the presence of threefold coordinated oxygens. The two distinct P−O peak components of the Zn and Na borophosphate glasses differ in their relative abundances. This is interpreted as follows: Na$^+$ cations coordinate oxygens in some P−O−B bridges, which is something not seen for the Zn$< {2+}$ ions.

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Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PE)
2. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2024

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