Abramovite
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| Abramovite | |
|---|---|
 | |
| General | |
| Category | Sulfides and sulfosalts |
| Formula | 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 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 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 volcano, Iturup Island, Kuril Islands, Russia.[5]
Formation
Abramovite is a product of precipitation from fumarolic gases (600 °C [1,112 °F]) in an active stratovolcano.[2]
Type occurrence
Abramovite comes in small metallic aggregates less than 1 mm across. Abramovite is conserved at A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow .[6]
The type locality for abramovite is Kudriavy volcano.[7] Minerals associated with abramovite at its type locality are wurtzite, sylvite, halite, galena, and anhydrite. [8]