Abramovite

Abramovite
General
Category	Sulfides and Sulfosalts
Formula (repeating unit)	Pb2SnInBiS7
Strunz classification	2.HF.25a (10th edition)
Dana classification	03.01.03.03
Crystal system	Triclinic
Crystal class	Pinacoidal (1) H-M symbol: (1)
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	[1][2][3][4]

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.^[4]

Etymology and History

Abramovite is named after the mineralogist Dmitry Vadimovich Abramov (born 1963) of the A.E. Fersman Museum, Russia.^[1]

It was discovered as fumarole crust on the Kudriavy (Kudryavyi) volcano, Iturup Island, Kuril Islands, Sakhalin Oblast, Far East Region, Russia.^[4]

Formation

Abramovite is a product of precipitation from fumarolic gases (600 °C [1,112 °F]) in an active stratovolcano.^[1]

References

1. Handbook of Mineralogy
2. Mindat.org
3. Webmineral.com Webmineral Data
4. Yudovskaya, M.A.; Trubkin, N.V.; Koporulina, E.V.; Belakovsky, D.I.; Mokhov, A.V.; Kuznetsova, M.V.; Golovanova, T.I. (2007). "Abramovite, Pb2SnInBiS7, a new mineral species from fumaroles of the Kudryavy Volcano, Kurile Islands". Zapiski Rossiiskogo Mineralogicheskogo Obshchestva (in Russian): 37–43. Bibcode:2008GeoOD..50..551Y. doi:10.1134/S1075701508070052. ISSN 0869-6055.