Cobalttsumcorite
Cobalttsumcorite is an IMA-recognized mineral species in the arsenate class, with the chemical formula PbCo₂(AsO₄)₂·2H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Natrochalcite structural group.
Key properties: Mohs hardness 4.5; specific gravity 5.31; Light brown streak; Adamantine luster; optically biaxial.
IMA symbol Ctsm, IMA status: approved, named in 1999.
Found in the oxidation zone of polymetallic ore deposits.
It is found associated with Quartz, mawbyite, cobaltlotharmeyerite, galena, arseniosiderite, plumbogummite.
The prefix, cobalt, indicates the cobalt analog of tsumcorite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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