Supriya Ghosh (Editor)

Heptasartorite

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Category  Sulfosalt
Crystal system  Monoclinic
Formula (repeating unit)  Tl7Pb22As55S108
Space group  P21/c
Crystal class  Prismatic (2/m) (same H-M symbol)
Unit cell  a = 37.62, b = 7.88, c = 20.07 [Å], β = 101.93° (approximated)

Heptasartorite is a very rare mineral with formula Tl7Pb22As55S108. It belongs to sartorite homologous series. It is related to other recently approved minerals of the series: enneasartorite and hendekasartorite. All three minerals come from a quarry in Lengenbach, Switzerland, which is famous of thallium minerals. Chemically similar minerals include edenharterite and hutchinsonite.

References

Heptasartorite Wikipedia


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