Skip to main content
. Author manuscript; available in PMC: 2014 Feb 15.
Published in final edited form as: Carbohydr Polym. 2012 Nov 23;92(2):1873–1879. doi: 10.1016/j.carbpol.2012.11.026

Table 1.

Comparison of unit cell dimensions of iota-carrageenan in different allomorphs

Solute/
Cation		 Unit cell dimensions (Å) Lattice Reference
a b c
Urea 27.16 27.16 12.82 Trigonal Present work
Na+ (I) 24.02 24.02 12.96 Trigonal (Janaswamy & Chandrasekaran, 2001)
Na+ (II) 13.70 20.08 13.16 Orthorhombic (Janaswamy & Chandrasekaran, 2006)
Na+ (III) 21.80 21.80 13.10 Trigonal (Janaswamy & Chandrasekaran, 2006)
Ca2+ (I) 13.70 13.70 13.30 Trigonal (Arnott, Scott, Rees & McNab, 1974)
Ca2+ (II) 23.61 23.61 13.21 Trigonal (Janaswamy & Chandrasekaran, 2002)
Ca2+ (III) 27.44 27.44 13.01 Trigonal (Janaswamy & Chandrasekaran, 2008)
Sr2+ 13.70 13.70 13.30 Trigonal (Arnott, Scott, Rees & McNab, 1974)
Mg2+ 14.70 14.70 13.00 Trigonal (Arnott, Scott, Rees & McNab, 1974)
Rb+ 54.60 54.60 12.30 Trigonal (Janaswamy & Chandrasekaran, 2005)
K+ 68.20 68.20 13.10 Trigonal (Janaswamy & Chandrasekaran, 2005)