Pautovite
Pautovite is an IMA-recognized mineral species in the sulfide class, with the chemical formula CsFe₂S₃.
It crystallizes in the orthorhombic crystal system (space group Cmcm). It is a member of the Cubanite structural group.
Key properties: specific gravity 3.85; Metallic luster.
IMA symbol Ptv, IMA status: approved, named in 2004.
Occurs as hydrothermal overgrowths on belovite-(Ce), ussingite, microcline, nordite-(Ce) and bornemanite.
It is found associated with Aegirine, natrosilite, sodalite, potassicarfvedsonite, serandite, ferronordite-(Ce), vuonnemite, lomonosovite, vitusite-(Ce), phosinaite-(Ce).
The mineral was named to honor Leonid Anatol’evich Pautov (b. 1958), a Russian mineralogist with the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow.