nepheline

/nef-uh-lin/US // ˈnɛf ə lɪn //UK // (ˈnɛfɪlɪn, -ˌliːn) //

侄女,侄子,肾上腺素

Definitions

n.名词 noun

1
- : a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO4, occurring in alkali-rich volcanic rocks.

The flows from Kibo include nepheline and leucite basanite lavas rich in soda felspars.
Leucite and nepheline rocks have been found in various parts of the island, especially in the south-west.
The largest of these streams is that from the Niedermendig, which consists of porous masses of nepheline lava.
The nepheline is in small six-sized prisms, and usually cannot be detected with the unaided eye.
This substance may be imperfectly crystallized nepheline, or a peculiar glass which is rich in soda.