Hydrogen bonding in ikaite, CaCO3.6H2O

  1. Get@NRC: Hydrogen bonding in ikaite, CaCO3.6H2O (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1180/0026461036730117
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Journal titleMineralogical Magazine
Pages555562; # of pages: 8
SubjectCalcium Carbonate Hexahydrate.; Hydrogen Bonding; Ikaite; Powder Neutron Diffraction
AbstractIkaite is a metastable hexahydrate of calcium carbonate, forming in aqueous conditions near freezing conditions. Neutron powder diffraction data of synthetic deuterated ikaite, collected at seven temperatures from 4 to 270 K, were refined. The linear thermal expansion coefficients are quite anisotropic, being smaller in the direction of the C-O bond. A review of the hydrogen-bonding scheme around the (CaCO03) ion pair is given and an additional weak potential hydrogen bond is suggested. Temperature-dependent growth of the atomic displacement factors of the carbonate O1 atom agrees with the previous suggestion of a possible low-frequency, hindered librational mode of the carbonate group.
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AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
NPARC number12332880
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Record identifier876c339c-0ff8-46be-af48-f53e4d207989
Record created2009-09-10
Record modified2016-05-09
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