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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
Graulichite-(La) is a new mineral, approved in 2021 and to date (March 2025) 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).
Graulichite-(La) from the Bou Skour Mine
- Image
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