Contribution to the Crystal Chemistry of the Layer Silicates

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DOIResolve DOI: http://doi.org/10.4224/20375702
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TypeTechnical Report
ISSN0077-5606
Physical description23 p.
Subjectsilicate minerals; crystalline state; cations
AbstractThe great number of (Si[2]O[5]) layer silicates is primarily due to the differences in size and charge of the cations. Anhydrous layer silicates show an increasing degree of convolution of layers with decreasing radius/charge ratio of cations, the size of cation sites between layers decreasing at the same time. This explains why 1+ cations form anhydrous layer silicates and 2+ cations of small or medium size and 3+ cations do not. In hydrous layer silicates the [ MeO(OH)] polyhedra are `effective' cations. The deviation from a plain conformation increases with increasing ratio radius/charge, from Al[4](Si[4]O[10])(OH)[8] and the bent serpentines to the ruffled ones of pyrosmalite and apophyllite.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierNRC-TT-1479
NRC number524
NPARC number20375702
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Record identifierfa8877a1-26b8-4160-aaae-f6c6b5646567
Record created2012-07-23
Record modified2016-10-03
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