Vorlanite
Vorlanite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CaUO₄.
It crystallizes in the cubic crystal system (space group Fm-3m). It is a member of the Fluorite structural group.
Key properties: Mohs hardness 4–5; specific gravity 7.291; Dark brown to cherry-red streak; Submetallic luster.
IMA symbol Vrl, IMA status: approved, named in 2009.
Found in a calcareous skarn xenolith in ignimbrite probably transformed by radiation damage to CaUO4 (Russia).
It is found associated with Larnite, chegemite, reinhardbraunsite, lakargiite, rondorfite, wadalite (Russia); larnite, mayenite, ye’elimite, brownmillerite (Israel).
The name commemorates the locality that produced the first specimens, Mt. Vorlan.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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