Anorthite ( ) is the calcium-rich end-member of the series. While it is a primary rock-forming mineral that is relatively rare in its pure form on Earth, it is a dominant component of the lunar highlands . 1. Composition and Physical Properties
: Highly porous anorthite ceramics are used as "green" materials for thermal insulation, sound absorption, and as catalyst carriers. anorthite
ceramic components in high-temperature environments, maintaining strength up to Anorthite ( An90−100cap A n sub 90 minus 100 end-sub An0−10cap A n sub 0 minus 10 end-sub Primary Cation Common Origin High-temperature magmas, Moon Low-temperature magmas, Earth's crust Density Slightly higher Slightly lower Primary Rock Anorthosite, Gabbro Granite, Rhyolite Anorthite ( ) is the calcium-rich end-member of the series
: On Earth, pure anorthite is restricted primarily to basic and ultrabasic igneous rocks like gabbro, picrite, or specialized formations such as the Adirondack Mountains . Moon Low-temperature magmas
: Researchers use anorthite grains from lunar samples (like those from the Chang’e-5 mission) to study how meteorite impacts and solar wind alter planetary surfaces over time.