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单词 norbergite
释义

norbergiten.

Brit. /ˈnɔːbəːɡʌɪt/, U.S. /ˈnɔrbərˌɡaɪt/
Origin: From a proper name, combined with an English element. Etymons: proper name Norberg , -ite suffix1.
Etymology: < Norberg, the name of a village in Sweden near which the mineral was discovered + -ite suffix1.
Mineralogy.
An orthorhombic basic silicate and fluoride of magnesium, Mg3SiO4(F,OH)2, which is a member of the humite group and occurs as pink or whitish crystals.
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the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > olivine group > humite or norbergerite
humite1814
norbergite1926
1926 P. Geijer in Geol. Förening. Stockholm Förhandl. 48 84 Norbergite. Only in massive aggregates, crystal system unknown... The proposed name is derived from the name of the district, since that of the mine is unsuitable for an international nomenclature.
1968 Mineral. Mag. 36 966 The polyhedral distortions in norbergite are smaller than in forsterite in accord with the decreased number of shared edges.
1992 W. A. Deer et al. Introd. Rock-forming Minerals (ed. 2) 19 The refractive indices and densities of the humite minerals increase progressively from norbergite to clinohumite.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1926
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