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Tazieffite

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Haroun Tazieff
Formula:
Pb20Cd2(As,Bi)22S50Cl10
Colour:
silver-gray in color, occasionally with a magenta tint
Lustre:
Metallic
Specific Gravity:
6.07 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Haroun Tazieff (11 May 1914, Warsaw, Russian Empire – 6 February 1998, Paris, France), famous volcanologist. He lived in Belgium starting in 1917 and later in France. He was a pioneer in modern volcanology and spent considerable effort in popularizing vulcanology through numerous books, popular science papers, and documentaries. He directed and appeared in 'Le Volcan interdit' that was nominated in 1966 for an Academy Award for Best Documentary Feature.
This page provides mineralogical data about Tazieffite.


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Classification of TazieffiteHide

Approved
Approval Year:
2008

Physical Properties of TazieffiteHide

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

Optical Data of TazieffiteHide

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

Chemical Properties of TazieffiteHide

Formula:
Pb20Cd2(As,Bi)22S50Cl10

Crystallography of TazieffiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 8.352 Å, b = 45.592 Å, c = 27.261 Å
β = 98.84°
Ratio:
a:b:c = 0.183 : 1 : 0.598
Unit Cell V:
10,257.26 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

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)

Type Occurrence of TazieffiteHide

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
Associated Minerals at Type Locality:

Synonyms of TazieffiteHide

Other Language Names for TazieffiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Kudriavite1 photo of Tazieffite associated with Kudriavite on mindat.org.

Other InformationHide

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 TazieffiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 TazieffiteHide

Localities for TazieffiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Far-Eastern Region
    • Kamchatka Oblast'
American Mineralogist, Volume 94, pages 1312–1324, 2009
Mineral and/or Locality  
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