Abramovite

• IMA 2006-016

Abramovit is a very rarely occurring mineral from the mineral class of sulfides and sulfosalts. It crystallizes in the triclinic crystal system with the chemical composition and forms laminar Pb2SnInBiS7 - lamellar, elongated crystals to 1 x 0.2 mm in size.

Etymology and history

The mineral was first found in 2007 by MA Yudovskaya, NV Trubkin, EV Koporulina, DI Belakovsky, AV Mokhov, MV Kuznetsova and TI Golovanova in the type locality, the Kudriavy Volcano on the Kuril island Iturup and after the Russian mineralogist Dmitry Vadimovich Abramov ( * 1963) named.

Classification

In the classification by Strunz Abramovit is counted among the sulfides and sulfosalts. After the 8th edition forms together with Coirait, Franckeit, Herzenbergit, Researcher, Levyclaudit, Mohit, Stistait, Suredait and Teallit a subset of the sulfides with Me: S, Se, Te = 1:1. In the 9th edition it forms with cylindrite, Franckeit, Incait, Lévyclaudit and Potosíit a subset of the SnS and PbS archetype with structural units.

In the classification by Dana it forms with cylindrite, Franckeit, Incait, Potosíit and Coirait a subset of sulfosalts with the ratio z / y > 4 and the composition (A ) i ( A2 ) j [ Bycz ], A ​​= metals, B = semimetals, C = non-metals.

Education and Locations

Abramovit forms in a fumarolic area with hot volcanic gases at about 600-650 ° C. So far, findings known only from the type locality Kudriavy. At the edge of the crater of this volcano also other rare minerals, including the only known rhenium mineral Rheniit were found.

Samples of Abramovit are deposited in the mineralogical Fersman Museum of the Russian Academy of Sciences in Moscow.

Crystal structure

Abramovit crystallizes in the triclinic space group P1 ( Raumgruppen-Nr. 2) and the lattice parameters a = 23.4 angstrom, b = 5.77 Å, c = 5.83 Å, α = 89.1 °, β = 89.9 ° and γ = 91.5 °.