Vladkrivovichevite
Vladkrivovichevite is an IMA-recognized mineral species in the borate class, with the chemical formula [Pb₃₂O₁₈][Pb₄Mn₂O]Cl₁₄(BO₃)₈·2H₂O.
It crystallizes in the orthorhombic crystal system (space group Pmmn).
Key properties: specific gravity 7.4; White streak; Adamantine luster.
IMA symbol Vkv, IMA status: approved, named in 2011.
Most likely a late-stage, low-temperature hydrothermal (epigenetic) reworking of primary Pb-Cu-Zn-Ag sulfides. Known from a single specimen purchased commercially.
It is found associated with Hereroite, asisite, damaraite, kombatite, sahlinite, quartz, native copper, barysilite, hausmannite, jacobsite, manganite.
The mineral was named to honor Professor Vladimir Gerasimovich Krivovichev (b. 1946), Head of the Mineralogy Department, Geological Faculty, St. Petersburg State University, Russia.