Images
Formula: Al2(Se4+O3)3.6H2O
Hydrated selenite
Crystal System: Hexagonal
Specific gravity: 2.504 calculated
Hardness: 2½
Streak: White
Colour: Colourless
Environments
Alfredopetrovite was approved in 2015 but to date (May 2023) it has been reported only from the type locality.
Localities
At the type locality, El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia, alfredopetrovite is a new
secondary selenite mineral that occurs
in vugs in a matrix of cobalt-rich
krut'aite–penroseite,
dolomite and goethite. Associated minerals
include ahlfeldite, allophane,
calcite, chalcomenite,
favreauite, felsőbányaite,
malachite and molybdenite. Crystals of
alfredopetrovite occur in drusy/scaly coatings and compact balls to 0.5 mm in diameter. Individual crystals are up to about
0.1 mm across
(EJM 28.2.479–484).
Back to Minerals