Rahul Sharma (Editor)

Mereheadite

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Category
  
Halide

Crystal system
  
Monoclinic

Strunz classification
  
3.DC.45

Space group
  
C2/c

Formula (repeating unit)
  
Pb47Cl25(OH)13O24(CO3)(BO3)2

Crystal class
  
Prismatic (2/m) (same H-M symbol)

Mereheadite is a rare oxychloride that can be found with Mendipite at Merehead quarry, Cranmore, Somerset, in the United Kingdom. Most specimens are associated with calcite, mendipite or hydrous cerussite in the Manganese pods on vein two at torr works quarry (merehead quarry). This mineral is associated with symesite which is also light yellow to orange. Symesite is found in small blotches on the calcites or mendipites; Mereheadite does not, as it is most often found in veins.

References

Mereheadite Wikipedia