Juanitaite
Juanitaite is an IMA-recognized mineral species in the arsenate class, with the chemical formula (Cu,Ca,Fe)₁₀Bi(AsO₄)₄(OH)₁₁·2H₂O.
It crystallizes in the tetragonal crystal system (space group P4_2/nnm).
Key properties: Mohs hardness 1; specific gravity 3.61; Pale greenish yellow streak; Resinous to dull; reflections from {001} often appear bronzy luster; optically uniaxial.
IMA symbol Jni, IMA status: approved, named in 1999.
A secondary mineral from the oxidation of tennantite, chalcopyrite, and pyrite in quartz veins.
It is found associated with Mixite, conichalcite, connellite, tyrolite, azurite, gold, quartz.
The mineral was named to honor Juanita Curtis, the mineral collector, who found the mineral.
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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