octahedriten.

Brit.

/ˌɒktəˈhiːdrʌɪt/, U.S.

/ˌɑktəˈhiˌdraɪt/

Forms: 1800s– octahedrite, 1800s– octohedrite.

Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: octahedron n., -ite suffix¹.

Etymology: < octahedron n. + -ite suffix¹, after French octaédrite (H.-B. de Saussure Voyages dans les Alpes (1796) IV. 85).On the form in octo- see the discussion at octa- comb. form. N.E.D. (1902) gives also the pronunciation (-he·drəit) /-ˈhɛdraɪt/ for the second element.

1. Mineralogy. A mineral consisting of titanium dioxide and forming octahedral crystals. Now usually called anatase.

ΘΚΠ

the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > rutile and uranite groups A02 > anatase

octahedrite1805

anatase1843

1805 R. Jameson Syst. Mineral. II. 493 Octahedrite... Its colour passes from indigo-blue, through many shades, to dark reddish-brown and yellowish-brown.

1818 Philos. Trans. (Royal Soc.) 108 225 (table) Octohedrite.

1868 J. D. Dana Syst. Mineral. (ed. 5) 162 De Saussure's name octahedrite has priority, and is particularly appropriate, the crystals being usually octahedrons.

1959 C. S. Hurlbut Dana's Man. Mineral. (ed. 17) ii. 79 For zircon the length of the vertical axis is expressed as c = 0.901, for octahedrite as c = 1.777.

1974 W. R. Hamilton et al. Hamlyn Guide Minerals Rocks & Fossils (1989) 50 Anatase (Octahedrite) TiO₂.

2. An iron meteorite which shows a Widmanstätten structure on etching, due to intimate intergrowths of plates of kamacite with narrow borders of taenite oriented parallel to the faces of a regular octahedron.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > meteorite > other meteorites

air-stone1608

iron1802

aerolite1810

aerolith1811

uranolite1815

star-glint1825

brontolith1860

aerosiderite1863

aerosiderolite1863

pallasite1863

siderolite1863

siderite1866

mesosiderite1868

howardite1881

chondrite1883

oligosiderite1883

plessite1885

diogenite1895

achondrite1904

octahedrite1905

nakhlite1916

ureilite1916

stony-iron1918

micrometeorite1949

1905 Field Columbian Mus. Publ.: Geol. Series 3 4 The composition of the meteorite is thus seen to be that usual to medium octahedrites, with a high percentage of phosphorus.

1944 C. Palache et al. Dana's Syst. Mineral. (ed. 7) I. 120 A similar structureless aspect can be obtained in an octahedrite by prolonged heating at about 900°.

1974 Encycl. Brit. Micropædia VII. 477/2 Besides nickel-iron, major minerals in octahedrites are troilite and schreibersite.

1992 S. P. Maran Astron. & Astrophysics Encycl. 431/1 Irons composed only of kamacite are called hexahedrites; those appearing only to contain taenite..are abaxites; those with both phases are octahedrites.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	octahedrite
释义	octahedriten. Brit. /ˌɒktəˈhiːdrʌɪt/, U.S. /ˌɑktəˈhiˌdraɪt/ Forms: 1800s– octahedrite, 1800s– octohedrite. Origin: Formed within English, by derivation; modelled on a French lexical item. Etymons: octahedron n., -ite suffix¹. Etymology: < octahedron n. + -ite suffix¹, after French octaédrite (H.-B. de Saussure Voyages dans les Alpes (1796) IV. 85).On the form in octo- see the discussion at octa- comb. form. N.E.D. (1902) gives also the pronunciation (-he·drəit) /-ˈhɛdraɪt/ for the second element. 1. Mineralogy. A mineral consisting of titanium dioxide and forming octahedral crystals. Now usually called anatase. ΘΚΠ the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > rutile and uranite groups A02 > anatase octahedrite1805 anatase1843 1805 R. Jameson Syst. Mineral. II. 493 Octahedrite... Its colour passes from indigo-blue, through many shades, to dark reddish-brown and yellowish-brown. 1818 Philos. Trans. (Royal Soc.) 108 225 (table) Octohedrite. 1868 J. D. Dana Syst. Mineral. (ed. 5) 162 De Saussure's name octahedrite has priority, and is particularly appropriate, the crystals being usually octahedrons. 1959 C. S. Hurlbut Dana's Man. Mineral. (ed. 17) ii. 79 For zircon the length of the vertical axis is expressed as c = 0.901, for octahedrite as c = 1.777. 1974 W. R. Hamilton et al. Hamlyn Guide Minerals Rocks & Fossils (1989) 50 Anatase (Octahedrite) TiO₂. 2. An iron meteorite which shows a Widmanstätten structure on etching, due to intimate intergrowths of plates of kamacite with narrow borders of taenite oriented parallel to the faces of a regular octahedron. ΘΚΠ the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > meteorite > other meteorites air-stone1608 iron1802 aerolite1810 aerolith1811 uranolite1815 star-glint1825 brontolith1860 aerosiderite1863 aerosiderolite1863 pallasite1863 siderolite1863 siderite1866 mesosiderite1868 howardite1881 chondrite1883 oligosiderite1883 plessite1885 diogenite1895 achondrite1904 octahedrite1905 nakhlite1916 ureilite1916 stony-iron1918 micrometeorite1949 1905 Field Columbian Mus. Publ.: Geol. Series 3 4 The composition of the meteorite is thus seen to be that usual to medium octahedrites, with a high percentage of phosphorus. 1944 C. Palache et al. Dana's Syst. Mineral. (ed. 7) I. 120 A similar structureless aspect can be obtained in an octahedrite by prolonged heating at about 900°. 1974 Encycl. Brit. Micropædia VII. 477/2 Besides nickel-iron, major minerals in octahedrites are troilite and schreibersite. 1992 S. P. Maran Astron. & Astrophysics Encycl. 431/1 Irons composed only of kamacite are called hexahedrites; those appearing only to contain taenite..are abaxites; those with both phases are octahedrites. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < n.1805
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