Dagenaisite
Dagenaisite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Zn₃Te⁶⁺O₆.
It crystallizes in the monoclinic crystal system (space group C2/c).
Key properties: Mohs hardness 2; specific gravity 6; White streak; Pearly luster.
IMA symbol Dag, IMA status: approved, named in 2017.
A late-stage secondary phase formed by the oxidative alteration of earlier Te- and Zn- bearing minerals, probably hessite and sphalerite in a polymetallic vein deposit.
It is found associated with Cinnabar, dugganite, eurekadumpite, gold, quartz, dolomite.
The mineral was named to honor John Dagenais (b. 1945), of Vancouver, British Columbia, Canada. Mr. Dagenais has been an active mineral field collector for nearly 50 years.
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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