OD-Interpretation of Kaolinite-Type Structures—II: The Regular Polytypes (MDO-Polytypes) and their Derivation

K. Dornberger-Schiff and S. Ďurovič
Central Institute of Physical Chemistry, Academy of Sciences of the German Democratic Republic, Rudower Chaussee 5, Berlin-Adlershof, 1199, G.D.R.
Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 5, 809 34 Bratislava, Czechoslovakia
* These will be called ‘kaolinites’ in the following, for short.
See ‘Some remarks on terminology’ in our previous paper.

Abstract: All MDO-polytypes (i.e. regular polytypes) of trioctahedral, dioctahedral and monoctahedral 1:1 phyllosilicates are derived from their OD-character using the results of our preceding paper. The terms ‘simple polytype’, ‘standard polytype’ and ‘regular polytype’ turn out to be synonyms of the term ‘MDO-polytype’ which has the advantage of being exactly defined. The method used to obtain the MDO- polytypes is also applicable to more complicated cases.

Clays and Clay Minerals; July 1975 v. 23; no. 3; p. 231-246; DOI: 10.1346/CCMN.1975.0230311
© 1975, The Clay Minerals Society
Clay Minerals Society (www.clays.org)