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Arsenate

O'danielite

Na   ZnZn₂(AsO₄)[AsO₃(OH)]₂
Hardness3
Crystal systemMonoclinic
ClassArsenate
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O'danielite

O'danielite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Na   ZnZn₂(AsO₄)[AsO₃(OH)]₂.

It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Alluaudite structural group.

Key properties: Mohs hardness 3; specific gravity 4.24; White streak; Vitreous luster; optically biaxial.

IMA symbol Oda, IMA status: approved, named in 1979.

A rare secondary mineral found in the oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit.

It is found associated with Tennantite, chalcocite, cuprian adamite, stranskiite, lavendulan, köttigite, tsumcorite, koritnigite, prosperite.

The mineral was named to honor Dr. Herbert O’Daniel (1903–1977), Professor of Mineralogy, University of Munich, Munich, Germany, and Editor of Neues Jahrbuch für Mineralogie.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more O minerals or help write this entry.