Definition of polytype in English:

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Pronunciation: /ˈpɒlɪtʌɪp/


Any of a number of forms of a crystalline substance which differ only in one of the dimensions of the unit cell.
Example sentences
  • There are four polytypes known.
  • Microcrystals of the following polytypes were identified: 4H, 6H, 15R, and 18R.
  • Several polytypes of wurtzite were reported at the Negley and Alikanna sites.



Pronunciation: /pɒlɪˈtɪpɪk/
Example sentences
  • This procedure helped in making an unambiguous distinction of the dielectric behaviour of the polytypic crystal from that of the corresponding 4H structure.
  • The most basic branched polytypic crystal that can therefore be produced using these materials is a tetrapod.


Example sentences
  • Neither the concept of polytypism nor the X-ray diffraction technique was known in Domeyko's time.
  • Polytypism is a type of polymorphism wherein different polymorphs exist in different domains of the same crystal.
  • The polytypism in graphite manifests itself in two ways.
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