periclasen.

Brit.

/ˈpɛrᵻkleɪz/,

/ˈpɛrᵻkleɪs/, U.S.

/ˈpɛrəˌkleɪs/,

/ˈpɛrəˌkleɪz/

Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: peri- prefix, -clase comb. form.

Etymology: < peri- prefix + -clase comb. form, after Italian periclasia ( A. Scacchi Memorie Mineralogiche e Geologiche (1841) 23); < peri- peri- prefix + ancient Greek κλάσις fracture (see -clase comb. form), with reference to its perfect cleavage; compare Hellenistic Greek περίκλασις the action of twisting or wheeling round, modification, brokenness, ruggedness). Compare French périclase (1856 or earlier).

Mineralogy.

A colourless mineral consisting of magnesium oxide, crystallizing in the cubic system and occurring in marble and limestone.

ΘΚΠ

the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > general formula AO > periclase

periclase1844

periclasite1868

1844 J. D. Dana Syst. Mineral. (ed. 2) 405 Periclase..occurs in the calcareous blocks of Mont Somma.

1892 Amer. Naturalist 26 59 Perfect crystals of periclase on a muffel in which magnesium oxychloride has been heated.

1939 Proc. Royal Soc. A. 172 119 The periclase was a small crystal separated from a mass of fused magnesia.

1974 Nature 8 Feb. 356/2 Forsterite (Mg₂SiO₄) decomposes to periclase (MgO) and stishovite (SiO₂).

1996 Science 31 May 1317/1 Periclase is rare, and the rounded grains..are pure MgO in composition.

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

单词	periclase
释义	periclasen. Brit. /ˈpɛrᵻkleɪz/, /ˈpɛrᵻkleɪs/, U.S. /ˈpɛrəˌkleɪs/, /ˈpɛrəˌkleɪz/ Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: peri- prefix, -clase comb. form. Etymology: < peri- prefix + -clase comb. form, after Italian periclasia ( A. Scacchi Memorie Mineralogiche e Geologiche (1841) 23); < peri- peri- prefix + ancient Greek κλάσις fracture (see -clase comb. form), with reference to its perfect cleavage; compare Hellenistic Greek περίκλασις the action of twisting or wheeling round, modification, brokenness, ruggedness). Compare French périclase (1856 or earlier). Mineralogy. A colourless mineral consisting of magnesium oxide, crystallizing in the cubic system and occurring in marble and limestone. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > general formula AO > periclase periclase1844 periclasite1868 1844 J. D. Dana Syst. Mineral. (ed. 2) 405 Periclase..occurs in the calcareous blocks of Mont Somma. 1892 Amer. Naturalist 26 59 Perfect crystals of periclase on a muffel in which magnesium oxychloride has been heated. 1939 Proc. Royal Soc. A. 172 119 The periclase was a small crystal separated from a mass of fused magnesia. 1974 Nature 8 Feb. 356/2 Forsterite (Mg₂SiO₄) decomposes to periclase (MgO) and stishovite (SiO₂). 1996 Science 31 May 1317/1 Periclase is rare, and the rounded grains..are pure MgO in composition. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1844
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