| 释义 |
norsethite Min.|ˈnɔːsəθaɪt|
[See quot. 19592 and -ite1.]
A carbonate of barium and magnesium, BaMg(CO3)2, that is found as whitish crystals with a vitreous or pearly lustre, similar to calcite and dolomite.
1959C. Milton et al. in Bull. Geol. Soc. Amer. LXX. 1646 Norsethite, BaMg(CO3)2, was found in dolomitic, black oil shale below the main trona bed in the Westvaco trona mine. Ibid., Norsethite is named in honor of Mr. Keith Norseth, engineering geologist of the trona mine at Westvaco, Sweetwater County, Wyoming. 1967Amer. Mineralogist LII. 1770 The occurrence of norsethite, BaMg(CO3)2, in large quantities in a newly discovered zinc-lead-copper deposit in South West Africa, is reported. It is one of the major gangue minerals of the deposit, is closely associated with calcite and is apparently of hydrothermal origin. 1968I. Kostov Mineralogy ii. xi. 540 Norsethite is probably trigonal⁓trapezohedral with distinct rhombohedral {ob}1011{cb} cleavage. |