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Formula: CoFe3+2(AsO4)2(OH)2.4H2O
Hydrated arsenate containing hydroxyl,
arthurite group,
cobalt-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.22 measured
Hardness: 3½ to 4
Streak: White to pale brown
Colour: Yellowish brown to straw yellow
Environments:
Cobaltarthurite is a secondary mineral.
At Khder, Bou Azzer, Morocco, cobaltarthurite occurs in cavities in löllingite ore associated with
arseniosiderite, scorodite
and karibibite
(MinRec 38.5.367).
At Oumlil-East, Bou Azzer, Morocco, cobaltarthurite occurs in vein rock associated with
karibibite and parasymplesite
(MinRec 38.5.367).
At the type locality at the Dolores prospect in Murcia, Spain, cobaltarthurite occurs is associated with
olivenite and jarosite.
(Dakota matrix minerals https://www.dakotamatrix.com/mineralpedia/8655/cobaltarthurite).
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