| 释义 |
norbergite Min.|ˈnɔːbɜːgaɪt|
[f. Norberg, the name of the village in Sweden near which it was discovered + -ite1.]
A basic silicate and fluoride of magnesium, Mg3SiO4(F,OH)2, which is found as pink or whitish orthorhombic crystals.
1926P. Geijer in Geol. Förening. Stockholm Förhand. XLVIII. 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. 1928Amer. Mineralogist XIII. 349 The norbergite occurs in a coarsely crystalline limestone from the Nicoll Quarry, and grains or crystals are commonly several millimeters across. 1968Mineral. Mag. XXXVI. 966 The polyhedral distortions in norbergite are smaller than in forsterite in accord with the decreased number of shared edges. |