Calderónite
Calderónite is an IMA-recognized mineral species in the vanadate class, with the chemical formula Pb₂Fe³⁺(VO₄)₂(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Brackebuschite structural group.
Key properties: Mohs hardness 3–4; specific gravity 6.04; Red streak; Vitreous to resinous (if altered) luster; optically biaxial.
IMA symbol Cdn, IMA status: approved, named in 2001.
Found in the upper oxidation zone of Pb-Zn hydrothermal deposits.
It is found associated with Mottramite, descloizite, vanadinite.
The mineral was named to honor Professor Salvador Calderón, (1852-1911), for his contributions to the mineralogy of Spain.
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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