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Electron diffraction of Valonia cellulose. A quantitative interpretation

✍ Scribed by W. Claffey; J. Blackwell

Publisher
Wiley (John Wiley & Sons)
Year
1976
Tongue
English
Weight
656 KB
Volume
15
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

The crystal structure of native cellulose (Valonia) has been analyzed by electron diffraction. Possible models for the structure were refined by rigid‐body least squares methods, which incorporated parameters defining the preferred orientation of the fibrils around their long axes in the cell wall lamellae. The structure was found to consist of an array of chains having the same sense (i.e., parallel), with packing parameters similar to those recently determined by X‐ray diffraction. The eight‐chain unit cell could be approximated adequately by a two‐chain monoclinic unit cell with dimensions a = 8.18 Γ…, b = 7.84 Γ…, c = 10.38 Γ… (fiber axis), and Ξ³ = 97.04Β°; the space group is P2~1~.

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