Studenitsite

studenitsite

colemanite

howlite

ulexite

Images

Formula: NaCa2B9O14(OH)4.2H2O
Hydrated borate containing hydroxyl
Specific gravity: 2.29
Hardness: 5½ to 6
Streak: White
Colour: Colourless to light dirty-yellow and light grey
Solubility: No reaction with water, slowly dissolves in dilute HCl and H2S04.
Environments

Volcanic igneous environments
Sedimentary environments

Studenitsite is a rare mineral that to date (September 2021) has been reported only from the type locality.

Localities

At the type locality, the Pobrdzhsky Potok & Peskanya deposits, Baljevac na Ibru, Jarandol Basin, Raška, Raška District, Central Serbia, studenitsite occurs as aggregates of closely intergrown, striated crystals to 5mm long, in lenses in clay and carbonate-bearing volcanogenic-sedimentary borate deposits. Associated minerals include colemanite, howlite, ulexite and pentahydroborite (AM 79.1213, AM 81.1284, Mindat, HOM).

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