paramorphismn.

Brit.

/ˌparəˈmɔːfɪz(ə)m/, U.S.

/ˌpɛrəˈmɔrˌfɪz(ə)m/

Origin: Formed within English, by derivation. Etymons: para- prefix¹, -morphism comb. form.

Etymology: < para- prefix¹ + -morphism comb. form. Compare slightly earlier paramorphic adj. and later paramorph n.

Mineralogy.

The change of one mineral into another having the same chemical composition but a different crystal structure; the existence of paramorphs.

ΘΚΠ

the world > the earth > minerals > change processes > [noun] > paramorphism

paramorphism1854

paramorphosis1881

1854 J. D. Dana Syst. Mineral. (ed. 4) II. vi. 166 Scheerer considers them cases of paramorphism, or a change from one of the two forms of a dimorphous compound to the other, augite and hornblende being dimorphous.

1897 Philos. Trans. 1896 (Royal Soc.) A. 187 201 It seems probable that in this rock we have examples of both kinds of paramorphism between ilmenite and sphene.

1938 Geogr. Rev. 28 705 Du Toit's concept of paramorphism is attractive, but it is extremely doubtful whether inversion to low-density minerals takes place on the scale he suggests.

1987 Sedimentary Geol. 53 310 Paramorphism of cristobaltite into quartz again..is the only mechanism that explains the grading of chert into tripoli.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paramorphism
释义	paramorphismn. Brit. /ˌparəˈmɔːfɪz(ə)m/, U.S. /ˌpɛrəˈmɔrˌfɪz(ə)m/ Origin: Formed within English, by derivation. Etymons: para- prefix¹, -morphism comb. form. Etymology: < para- prefix¹ + -morphism comb. form. Compare slightly earlier paramorphic adj. and later paramorph n. Mineralogy. The change of one mineral into another having the same chemical composition but a different crystal structure; the existence of paramorphs. ΘΚΠ the world > the earth > minerals > change processes > [noun] > paramorphism paramorphism1854 paramorphosis1881 1854 J. D. Dana Syst. Mineral. (ed. 4) II. vi. 166 Scheerer considers them cases of paramorphism, or a change from one of the two forms of a dimorphous compound to the other, augite and hornblende being dimorphous. 1897 Philos. Trans. 1896 (Royal Soc.) A. 187 201 It seems probable that in this rock we have examples of both kinds of paramorphism between ilmenite and sphene. 1938 Geogr. Rev. 28 705 Du Toit's concept of paramorphism is attractive, but it is extremely doubtful whether inversion to low-density minerals takes place on the scale he suggests. 1987 Sedimentary Geol. 53 310 Paramorphism of cristobaltite into quartz again..is the only mechanism that explains the grading of chert into tripoli. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1854
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