Munakataite

Munakataite


Composition:

Pb2Cu2(Se4+O3)(SO4)(OH)4

Crystal System : Monoclinic
Colours: Pale-blue, intense-blue
Lustre : Vitreous, pearly
Hardness (H) : 1.5-2.0
Specific Gravity (S.G) : 5.53
References:

Flynn et al. (2016)

 

Distribution

Extremely rare.

Occurrence

  • Supergene

Paragenetic and General Notes

Munakataite was first observed from Tsumeb on a specimen in the collection of Shields Flynn (USA), where it occurs in association with mimetite, quartz, and smithsonite.  The munakataite was analysed by EDS, XRD, and Raman spectroscopy at the University of Arizona (RRUFF project).  It occurs as sheaves of minute blue needles (resembling connellite, for which it was initially mistaken) associated with galena, mimetite, plumboselite, quartz and smithsonite. (Shields Flynn, personal communication to M.Southwood, October 2015; Flynn et al., 2016).