[ Top ] [Polytype] [ Japanese ]

Order-Disorder Polytypes

Minerals having different symmetry systems by different ordering of atoms. Disorder polytypes are considered to indicate the higher formation temperature than order polytypes. Disorder polytypes may transit to order polytypes by geologic time scale annealing.

Suffix (Italic)
Order-Disorder structure (OD structure): -MDO

A list of minerals showing order-disorder polytypism