Graulichite-(La)

graulichite-(La)

malachite

conichalcite

agardite-(La)

Images

Formula: LaFe³⁺₃(AsO₄)₂(OH)₆
Arsenate, dussertite group, lanthanum-bearing mineral
Crystal System: Trigonal
Specific gravity: calculated for the empirical formulae, 3.907 and 3.962 for two different domains
Colour: Yellow
Environments

Hydrothermal environments

Graulichite-(La) is a new mineral, approved in 2021 and to date (December 2022) reported only from the type locality.

Localities

At the type locality, the Bou Skour mine, Bou Skour mining district, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco, graulichite-(La) occurs as rhombohedral crystals, up to 0.1 mm in size in the oxidation zone of the copper deposit; the rare earth elements most likely derived from the local igneous rocks. Associated minerals include malachite, conichalcite and agardite-(La) (Mindat).

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