Veokite

Veokite is a rare aluminosilicate mineral characterized by a layered tetrahedral–octahedral framework. It was described in 2022 by a multidisciplinary team from the Alpine Geoscience Institute after specimens were collected in the Veok Valley, from which the mineral derives its name. The type locality is Veok Valley, where hydrothermal veins hosted quartz and muscovite. Veokite’s discovery added another example of complex phyllosilicate-like structures in metamorphic-hydrothermal environments.

The chemical composition of veokite is variable, but it can be represented by a simplified formula reflecting alternating silicate sheets and octahedral layers, with aluminum and magnesium as major cations and iron, calcium, and sodium as common substitutes. The structure yields a monoclinic crystal system, and crystals are often prismatic or tabular with moderate to good cleavage along specific faces. Veokite typically shows a vitreous luster and exhibits translucent to opaque material in hand specimens.

Veokite occurs in hydrothermal veins within metamorphic terranes, frequently associated with quartz, muscovite, calcite, and enstatite. Formation conditions are interpreted as low to medium-grade metamorphism and hydrothermal alteration, roughly in the range of 250–450°C, with fluid activity driving the mineral’s growth. The mineral can form as discrete crystals or as inclusions within broader silicate assemblages.

Physical properties are variable but characteristic: pale green to gray color; white streak; vitreous luster; Mohs hardness about 5.5; density approximately 2.9–3.2 g/cm3. Veokite is primarily of interest to researchers and mineral collectors. It has been discussed for insights into metamorphic processes and potential geochemical applications, though no widespread industrial uses have been established.

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