Raite with Aegirine

specimen number:
2133387

location:
Lovozero Massif, Kola Peninsula, Russia

description:
Crystallized raite on matrix with minor aegirine. Good example for the species. The specimen comes with several previous labels as shown at the end of the video.

The Lovozero massif, situated on the central Kola Peninsula in Murmansk Oblast, Russia, is an immense, horseshoeshaped layered intrusive complex renowned for its highly evolved peralkaline igneous rocks. Geologically, this Late Devonian multi-phase pluton is composed of agpaitic nepheline syenites, foyaite-urtite suites, and lujavrites that formed through a complex history of magma differentiation, resulting in extreme enrichment of rare earth elements, zirconium, niobium, and thorium. Prospecting in the region began in the late 1920s and 1930s under the direction of Soviet mineralogists, leading to the establishment of formal underground mining operations around 1951. Industrial development expanded with the commissioning of the Karnasurt mine and mill complex, followed later by the Umbozero mine, specifically targeting lopolith-like layers of eudialyte and loparite ore for the extraction of rare earths and rare metals. These specialized mining activities have continued steadily through the Soviet era and into the modern period, remaining an essential industrial supplier of critical technical elements.

Raite is an exceptionally rare, hydrous sodium manganese titanosilicate mineral that crystallizes in the orthorhombic system. Geologically, it occurs as an ultra-late hydrothermal phase within highly alkalic pegmatites, specifically localized in the hyper-agpaitic zones where hydrothermal solutions reacted with primary rock-forming minerals in conditions of extreme sodium and water concentration. The mineral typically forms small, fibrous or acicular crystal aggregates, radiating clusters, and thin felted coatings that display a golden-brown, reddish-brown, or distinct orange-brown coloration with a vitreous to silky luster. It was originally discovered in the Lovozero massif, with its type locality designated at the Mt. Maly Punkaruaiv pegmatite workings, where it was first officially described in 1973 in close association with other rare peralkaline minerals such as zorite, natrolite, and aegirine.

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