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The property of a mineral whose internal structure has changed without change in composition or external form. Formerly known as allomorphism.



a type of pseudomorphism that involves the polymorphous alteration of a high-temperature form of a mineral to a low-temperature form. With paramorphism there is a rearrangement in the crystalline structure of the mineral without a change in chemical composition; the external shape of the original crystal is also preserved. Examples of paramorphs are hexagonal α-quartz after trigonal β-quartz, rhombic sulfur after monoclinic sulfur, trigonal calcite after rhombic aragonite, and cubic pyrite after rhombic marcasite.

References in periodicals archive ?
Judgment Analysis is defined as using statistical methods to derive algebraic, paramorphic models of the judgment process (see above, Stewart, 1988).
1975), the data were subjected to individual Judgment Analyses deriving quantitative paramorphic models of the judgment processes.
That is, the paramorphic models show how participants derived their aesthetic judgments.
Many scientific theories can generate paramorphic models because the have cognitive objects with iconic properties that enable the representation of a certain class of unobservable beings.
An approach to the analysis of the sources of paramorphic models is summarized in Figure 2.
In an attempt to extend the functionality of an artificial neural network (ANN), it may be helpful to use a paramorphic model from another network such as the immune network (see e.
The variety of combinations of systems and levels is a major contributor to the number of paramorphic sources (Paton [1991a]).
For the purpose of the current analysis, we may say that the language of cell-as-text is being used rather than cell-as-machine; the source of the paramorphic model is text.