Tazieffite Mineral Data

General Tazieffite Information

Chemical Formula:

Pb20Cd2(As,Bi)22S50Cl10

Composition:

Molecular Weight = 8,377.10 gm

Cadmium 2.68 % Cd

Bismuth 7.48 % Bi

Arsenic 16.99 % As

Lead 49.47 % Pb

Sulfur 19.14 % S

Chlorine 4.23 % Cl

______

100.00 %

Empirical Formula:

Pb₂₀Cd₂As₁₉Bi₃S₅₀Cl₁₀

Environment:

Zinkenite plesiotypic series

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Mutnovsky volcano, Kamchatka Peninsula, Far East Asia, Russia Link to MinDat.org Location Data.

Name Origin:

Named for Haroun Tazieff (1914-1998), volcanologist who was a pioneer in field observation of active volcanoes.

Synonym:

IMA2008-012

Tazieffite Image

Images:

Tazieffite

Comments: Tiny acicular, metallic tazieffite crystals free-standing on matrix formed by volcanic sublimation.
Location: Mutnovsky Volcano, Kamchatka, Russia. Scale: Specimen size 0.8 x 0.5 x 0.5 cm.
© Tom Loomis / Dakota Matrix

Tazieffite Crystallography

Axial Ratios:

a:b:c =0.1831:1:0.5979

Cell Dimensions:

a = 8.352, b = 45.592, c = 27.261, Z = 4; beta = 98.84° V = 10,257.26 Den(Calc)= 5.42

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.313(1), 3.361(0.65), 3.8(0.53),2.835(0.39), 4.07(0.39), 2.789(0.36), 3.66(0.24), 4.35(0.21),

Physical Properties of Tazieffite

Diaphaneity:

Opaque

Luster:

Metallic

Calculated Properties of Tazieffite

Electron Density:

Bulk Density (Electron Density)=4.64 gm/cc
note: Specific Gravity of Tazieffite =5.42 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Tazieffite=1,050.68 barns/electron
U=PE_Tazieffite x rElectron Density=4,870.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tazieffite is Not Radioactive

Tazieffite Classification

Dana Class:

03.08.01.04 (03)Sulfides - Sulfosalts

(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.08.01)Zinkenite Group

03.08.01.01 Zinkenite Pb9Sb22S42 P 6₃ 6

03.08.01.02 Pillaite! Pb9Sb10S23ClO0.5 C 2/m 2/m

03.08.01.03 Pellouxite! (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O C 2/m 2/m

03.08.01.04 Tazieffite! Pb20Cd2(As,Bi)22S50Cl10 C 2/c 2/m

Strunz Class:

02.XX.00 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.X - Unclassified Strunz SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarse

02.XX -Unknown

02.XX.00 Isochalcopyrite? Cu8Fe9S16 Unk Cubic

02.XX.00 Bayankhanite? Cu6HgS4 Unk Hex

02.XX.00 Bravoite? (Fe,Ni,Co)S2 P a3 2/m 3

02.XX.00 Dzhezkazganite* (Pb,Cu,Rh)S2(?) P a3? 2/m 3

02.XX.00 Dilithium* Li2Te P 222 2 2 2

02.XX.00 Horobetsuite* (Bi,Sb)2S3 Pbnm 2/m 2/m 2/m

02.XX.00 Horsfordite? Cu5Sb Unk Cubic

02.XX.00 Kurilite? (Ag,Au)2(Te,Se,S) P m3n,P 4₃n Cubic

02.XX.00 Imgreite? NiTe P 6₃/mmc 6/m 2/m 2/m

02.XX.00 Matraite? ZnS R 3m 3m

02.XX.00 Iridisite* (Ir,Cu,Rh,Ni,Pt)S2 Unk Cubic

02.XX.00 Kitaibelite? Ag10PbBi30S51 Mono ? Mono

02.XX.00 Jeromite? As(S,Se)2 None

02.XX.00 Parajamesonite? Pb4FeSb6S14 Unk Ortho

02.XX.00 Volfsonite* Cu10CuFeFe2Sn3S16 P 4₂m-,P 42₁2 Tetra

02.XX.00 Prassoite Rh17S15(?) P m3m 4/m 3 2/m

02.XX.00 Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono

02.XX.00 Samaniite Cu2Fe5Ni2S8 P 4₁/mmm 4mm

02.XX.00 Tazieffite! Pb20Cd2(As,Bi)22S50Cl10 C 2/c 2/m

02.XX.00 Horomanite Fe6Ni3S8 P 4/mmm 4mm

Other Tazieffite Information

See Also:

Links to other databases for Tazieffite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Tazieffite Specimen Label here :

Tazieffite

Pb20Cd2(As,Bi)22S50Cl10
Dana No: 03.08.01.04 Strunz No: 02.XX.00
Locality:

Notes: