Images
Formula: PbCu(Se6+O4)(OH)2
Selenate,
linarite-chenite group
Crystal System: Monoclinic
Specific gravity: 5.64 calculated
Hardness: 2 to 2½
Streak: Very pale blue
Colour: Blue in transmitted light
Environments
Franksousaite is a new mineral, approved in 2021 and to date (October 2022) reported only from the type
locality.
Localities
At the type locality, the El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia,
franksousaite occurs as short prismatic crystals included in colourless
anglesite. Associated minerals are
cobalt-bearing
krut'aite–penroseite,
chalcomenite, schmiederite,
olsacherite, phosgenite,
anglesite and cerussite
(MM 86.5.792-798).
Back to Minerals