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单词 nefedyevite
释义

nefedyeviten.

Brit. /nɛˈfɛdjəvʌɪt/, /nəˈfɛdjəvʌɪt/, U.S. /nəˈfɛdjəˌvaɪt/
Forms: 1800s nefedieffite, 1800s nefediewit, 1800s nefediewite, 1900s– nefedevite, 1900s– nefed'evite, 1900s– nefedievite, 1900s– nefedjevite, 1900s– nefedyevite.
Origin: A borrowing from Russian. Etymon: Russian nefed′evit.
Etymology: < Russian nefed′evit (P. Puzyrevskij 1872, in Zapiski Imperatorskogo S.-Peterburgskogo Mineralogičeskogo Obščestva 2nd Ser. 7 15) < the name of V. V. Nefed′ev , 19th-cent. Russian mineralogist + -it -ite suffix1. O.E.D. Suppl. (1976) gives the pronunciation as (nefedye·vəit) /nɛfɛˈdjɛvaɪt/.
Mineralogy.
A white or pinkish aluminosilicate of magnesium and calcium belonging to the montmorillonite group.
ΘΚΠ
the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > smectites > other smectites
scoulerite1840
saponite1849
nefedyevite1873
sauconite1875
stevensite1889
rectorite1891
1873 Jrnl. Chem. Soc. 26 1210 Nefediewite; a new mineral... This amorphous mineral, very much like lithomarge, occurs, together with fluorspar, in the limestone of Nertschinsk.
1938 Mineral. Abstr. 7 104 Greenish-grey unctuous clay interbedded among Cretaceous limestones, the bulk of which consists of a fibrous crystalline aggregate..and in composition..corresponds to nefedievite.
1961 Doklady Earth Sci. 135 1296/1 In view of the great structural similarity between true montmorillonite and nefedyevite, doubling of the unit cell along the c axis can be expected.
1993 A. M. Clark Hey's Mineral Index (ed. 3) 488/1 Nefed'evite, aluminosilicate of Mg and Ca... A montmorillonitic clay.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
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n.1873
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