Structure of rare-earth phosphate glasses by neutron diffraction

Richard A. Martin; Philip S. Salmon; Henry E. Fischer; Gabriel J. Cuello

doi:10.1016/j.jnoncrysol.2004.08.024

Structure of rare-earth phosphate glasses by neutron diffraction

Richard A. Martin, Philip S. Salmon, Henry E. Fischer, Gabriel J. Cuello

School of Biosciences

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

Abstract

Neutron diffraction was used to measure the structure of the phosphate glasses RAl_0.30P_3.05O_9.62, where R denotes Dy or Ho, and RAl_0.34P_3.20O_10.04, where R denotes La or Ce. For each glass, isomorphic structures were assumed and difference function methods were employed to separate, essentially, those correlations involving the rare-earth ion, R³⁺, from the remainder. The ratio of bridging oxygen, O_B, to terminal oxygen, O_T, atoms in the PO₄ tetrahedra was quantified and in both materials R³⁺ and Al³⁺ are found to act as network modifying cations which bind to the O_T. The R–O_T coordination number is 6.7(1) and 7.5(2) for the Dy/Ho and La/Ce glasses respectively.

Original language	English
Pages (from-to)	208-212
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	345-346
Early online date	15 Sept 2004
DOIs	https://doi.org/10.1016/j.jnoncrysol.2004.08.024
Publication status	Published - 15 Oct 2004
Event	10th International Conference on the Physics of Non-Crystalline Solids - Parma, Italy Duration: 13 Jul 2003 → 17 Jul 2003

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title = "Structure of rare-earth phosphate glasses by neutron diffraction",

abstract = "Neutron diffraction was used to measure the structure of the phosphate glasses RAl0.30P3.05O9.62, where R denotes Dy or Ho, and RAl0.34P3.20O10.04, where R denotes La or Ce. For each glass, isomorphic structures were assumed and difference function methods were employed to separate, essentially, those correlations involving the rare-earth ion, R3+, from the remainder. The ratio of bridging oxygen, OB, to terminal oxygen, OT, atoms in the PO4 tetrahedra was quantified and in both materials R3+ and Al3+ are found to act as network modifying cations which bind to the OT. The R–OT coordination number is 6.7(1) and 7.5(2) for the Dy/Ho and La/Ce glasses respectively.",

author = "Martin, {Richard A.} and Salmon, {Philip S.} and Fischer, {Henry E.} and Cuello, {Gabriel J.}",

year = "2004",

month = oct,

day = "15",

doi = "10.1016/j.jnoncrysol.2004.08.024",

language = "English",

volume = "345-346",

pages = "208--212",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

note = "10th International Conference on the Physics of Non-Crystalline Solids, PNCS ; Conference date: 13-07-2003 Through 17-07-2003",

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TY - JOUR

T1 - Structure of rare-earth phosphate glasses by neutron diffraction

AU - Martin, Richard A.

AU - Salmon, Philip S.

AU - Fischer, Henry E.

AU - Cuello, Gabriel J.

PY - 2004/10/15

Y1 - 2004/10/15

N2 - Neutron diffraction was used to measure the structure of the phosphate glasses RAl0.30P3.05O9.62, where R denotes Dy or Ho, and RAl0.34P3.20O10.04, where R denotes La or Ce. For each glass, isomorphic structures were assumed and difference function methods were employed to separate, essentially, those correlations involving the rare-earth ion, R3+, from the remainder. The ratio of bridging oxygen, OB, to terminal oxygen, OT, atoms in the PO4 tetrahedra was quantified and in both materials R3+ and Al3+ are found to act as network modifying cations which bind to the OT. The R–OT coordination number is 6.7(1) and 7.5(2) for the Dy/Ho and La/Ce glasses respectively.

AB - Neutron diffraction was used to measure the structure of the phosphate glasses RAl0.30P3.05O9.62, where R denotes Dy or Ho, and RAl0.34P3.20O10.04, where R denotes La or Ce. For each glass, isomorphic structures were assumed and difference function methods were employed to separate, essentially, those correlations involving the rare-earth ion, R3+, from the remainder. The ratio of bridging oxygen, OB, to terminal oxygen, OT, atoms in the PO4 tetrahedra was quantified and in both materials R3+ and Al3+ are found to act as network modifying cations which bind to the OT. The R–OT coordination number is 6.7(1) and 7.5(2) for the Dy/Ho and La/Ce glasses respectively.

UR - https://www.sciencedirect.com/science/article/pii/S0022309304005496?via%3Dihub

U2 - 10.1016/j.jnoncrysol.2004.08.024

DO - 10.1016/j.jnoncrysol.2004.08.024

M3 - Article

SN - 0022-3093

VL - 345-346

SP - 208

EP - 212

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

T2 - 10th International Conference on the Physics of Non-Crystalline Solids

Y2 - 13 July 2003 through 17 July 2003

ER -

Structure of rare-earth phosphate glasses by neutron diffraction

Abstract

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