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Tazieffite

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Formula:
Pb20Cd2(As,Bi)22S50Cl10
System:
Monoclinic
Colour:
silver-gray in color, ...
Name:
After Haroun Tazieff (Warszawa, May 11, 1914–Paris, February 6, 1998), famous Belgian, then French volcanologist.
This page provides mineralogical data about Tazieffite.

Classification of Tazieffite

Approved 2008
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http://www.mindat.org/min-36040.html
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Type Occurrence of Tazieffite

General Appearance of Type Material:
Tiny, slender, needle-shaped crystals, up to 400 μm long and 10 μm across, generally forming fibrous aggregates
Place of Conservation of Type Material:
Fersman Museum, Moscow (catalog number 92674), and the Ecole des Mines de Paris (catalog number 78986).
Geological Setting of Type Material:
Volcanic fumarole

Physical Properties of Tazieffite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
silver-gray in color, occasionally with a magenta tint
Streak:
black
Tenacity:
Brittle
Density:
6.07 g/cm3 (Calculated)

Crystallography of Tazieffite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 8.352Å, b = 45.592Å, c = 27.261Å
β = 98.84°
Ratio:
a:b:c = 0.183 : 1 : 0.598
Unit Cell Volume:
V 10,257.26 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.35 (21)
4.07 (39)
3.80 (53)
3.66 (24)
3.361 (65)
3.313 (100)
2.835 (39)
2.789 (36)

Optical Data of Tazieffite

Type:
Anisotropic
Anisotropism:
weakly
Pleochroism:
Weak
Comments:
dark gray to blue-gray.

Chemical Properties of Tazieffite

Formula:
Pb20Cd2(As,Bi)22S50Cl10
Essential elements:
All elements listed in formula:

Other Names for Tazieffite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tazieffite

Reference List:
Michael Zelenski, Anna Garavelli, Daniela Pinto, Filippo Vurro, Yves Moëlo, Luca Bindi, Emil Makovicky, and Elena Bonaccorsi (2009) Tazieffite, Pb20Cd2(As,Bi)22S50Cl10, a new chloro-sulfosalt from Mutnovsky volcano, Kamchatka Peninsula, Russian Federation. American Mineralogist, 94, 1312–1324.

Internet Links for Tazieffite

Localities for Tazieffite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia (TL)
 
  • Far-Eastern Region
    • Kamchatka Oblast'
American Mineralogist, Volume 94, pages 1312–1324, 2009
Mineral and/or Locality  
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