Angulaarinen

Angulaarinen is a rare mineral species discovered in the Khibina alkaline complex in the Kola Peninsula, Russia. It was first described in 1987 and is named after its angular crystal habit. The mineral is typically found in association with other rare minerals such as eudialyte and kataphorite. Angulaarinen has a chemical composition of Na2Ca2(Si8O20) and crystallizes in the monoclinic system. Its crystals are usually small, ranging from 0.1 to 0.5 millimeters in size, and are often twinned. The mineral is transparent to translucent with a white to pale yellow color. Angulaarinen is considered a secondary mineral, forming as a result of the alteration of primary minerals in the alkaline complex. It is not known to have any significant economic value. The study of angulaarinen contributes to the understanding of the complex mineralogy and geochemistry of the Khibina complex.