DOI: 10.3189/s0022143000042854. Measuring the dihedral angle of water at a grain boundary in ice by an optical diffraction method

Measuring the dihedral angle of water at a grain boundary in ice by an optical diffraction method

10.3189/s0022143000042854

Crossref journal-article

International Glaciological Society

Journal of Glaciology (1782)

Abstract

AbstractOptical measurements have been made on the water lenses which form under pressure at grain boundaries in polycrystalline ice. Monochromatic light from a point source is focused by the lenses but, because the lenses are microscopic in size, the image is blurred by diffraction. The diffraction pattern observed under a microscope has been compared with the computed diffraction pattern to deduce the angle 2θ at the rim of each lens. This is the dihedral angle for water at a grain boundary in ice, and gives the ratio of the grain-boundary energy to that of an ice-water interface. The most sensitive measurements are those made on the rings of the virtual diffraction pattern formed on the object side of the lens. They give θ = 12.5 ± 0.5° for the grain boundary under observation, which is 26% lower than the previous value for θ found by ignoring diffraction.

Bibliography

Walford, M. E. R., & Nye, J. F. (1991). Measuring the dihedral angle of water at a grain boundary in ice by an optical diffraction method. Journal of Glaciology, 37(125), 107â112.

Authors 2

M.E.R. Walford (first)
J.F. Nye (additional)

References 6 Referenced 20

{'key': 'S0022143000042854_R5', 'first-page': '157', 'year': '1973', 'journal-title': 'International Association of Scientific Hydrology Publication 95 (Symposium at Cambridge 1969 — Hydrology of Glaciers)'} / International Association of Scientific Hydrology Publication 95 (Symposium at Cambridge 1969 — Hydrology of Glaciers) (1973)
10.1080/09500349114550731
10.3189/S0022143000022528
10.3189/S0022143000008637
{'key': 'S0022143000042854_R7', 'first-page': '139', 'year': '1976', 'journal-title': 'Grain boundary structure and properties'} / Grain boundary structure and properties (1976)
10.1139/p57-084

Dates

Type	When
Created	7 years, 11 months ago (Sept. 20, 2017, 6:19 a.m.)
Deposited	2 years, 4 months ago (April 3, 2023, 2:35 a.m.)
Indexed	1 month, 4 weeks ago (July 2, 2025, 3:30 p.m.)
Issued	34 years, 8 months ago (Jan. 1, 1991)
Published	34 years, 8 months ago (Jan. 1, 1991)
Published Online	8 years, 7 months ago (Jan. 20, 2017)
Published Print	34 years, 8 months ago (Jan. 1, 1991)

Funders 0

None

BibTeX

@article{Walford_1991, title={Measuring the dihedral angle of water at a grain boundary in ice by an optical diffraction method}, volume={37}, ISSN={1727-5652}, url={http://dx.doi.org/10.3189/s0022143000042854}, DOI={10.3189/s0022143000042854}, number={125}, journal={Journal of Glaciology}, publisher={International Glaciological Society}, author={Walford, M.E.R. and Nye, J.F.}, year={1991}, pages={107–112} }

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