pyroxene

/pahy-rok-seen, puh-, pahy-rok-seen/US // paɪˈrɒk sin, pə-, ˈpaɪ rɒkˌsin //UK // (paɪˈrɒksiːn) //

辉石,辉光岩,辉光石,辉石类

Definitions

n.名词 noun

1
- : any of a very common group of minerals of many varieties, silicates of magnesium, iron, calcium, and other elements, occurring as important constituents of many kinds of rocks, especially basic igneous rocks.

Hypersthene is not the prevailing pyroxene, and olivine is usually present, often in such abundance as to make the rock a basalt.
Rougemonite consists largely of anorthite with pyroxene as the only important ferro-magnesian constituent.
The third is less easily recognized as pyroxene, another of the many minerals containing iron.
The pyroxene in particular is very much changed, and quickly crumbles away in the hand.
Pyroxene is most abundantly represented as crystals in many kinds of igneous and metamorphic rocks.