Abramovite is a very rare mineral from the sulfides and sulfosalt categories. It has the chemical formula Pb2SnInBiS7. It occurs as tiny elongated lamellar-shaped crystals, up 1 mm × 0.2 mm in size, and is characterized by its non-commensurate structure.[5]
Abramovite | |
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General | |
Category | Sulfides and sulfosalts |
Formula (repeating unit) | Pb2SnInBiS7 |
IMA symbol | Abm[1] |
Strunz classification | 2.HF.25a (10th edition) |
Dana classification | 03.01.03.03 |
Crystal system | Triclinic |
Crystal class | Pinacoidal (1) (same H-M symbol) |
Space group | P1 |
Unit cell | a = 23.4 Å, b = 5.77 Å c = 5.83 Å; α = 89.1° β = 89.9°, γ = 91.5°; Z = 4 |
Identification | |
Formula mass | 1,066.44 g/mol |
Color | Silver gray |
Crystal habit | Encrustations – Forms crust-like aggregates on matrix |
Twinning | Lamellar on {100} |
Cleavage | Perfect on {100} |
Luster | Metallic |
Streak | Black |
Diaphaneity | Opaque |
References | [2][3][4][5] |
Abramovite is named after the mineralogist Dmitry Vadimovich Abramov (born 1963) of the A.E. Fersman Museum, Russia.[2]
It was discovered as fumarole crust on the Kudriavy (Kudryavyi) volcano, Iturup Island, Kuril Islands, Sakhalin Oblast, Far East Region, Russia.[5]
Abramovite is a product of precipitation from fumarolic gases (600 °C [1,112 °F]) in an active stratovolcano.[2]