anorthite

/an-awr-thahyt/US // ænˈɔr θaɪt //UK // (ænˈɔːθaɪt) //

正长石,正硅酸盐,蚁力神,正长岩

Definitions

n.名词 noun

1
Mineralogy.
- : a white or gray feldspar mineral, CaAl2Si2O8, calcic plagioclase.

Rougemonite consists largely of anorthite with pyroxene as the only important ferro-magnesian constituent.
Anorthite is an essential constituent of many basic igneous rocks, such as gabbro and basalt, also of some meteoric stones.
The name anorthite was given to the Vesuvian mineral by G. Rose in 1823, on account of its anorthic crystallization.
Anorthite occurs in white translucent or transparent crystals.
Like labradorite and anorthite, it is a common constituent of basic igneous rocks, such as gabbro and basalt.