Metatamboite
Metatamboite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Fe³⁺₃(OH)(H₂O)₂(SO₄)(Te⁴⁺O₃)₃[Te⁴⁺O(OH)₂](H₂O).
It crystallizes in the monoclinic crystal system (space group P2_1/c).
Key properties: specific gravity 4.053; Very pale yellow to colorless streak; Greasy to vitreous luster.
IMA symbol Mtm, IMA status: approved, named in 2016.
Found in the interstices of silicified epithermal hydrothermal breccias of dacitic tuff.
It is found associated with Alunite, rodalquilarite, emmonsite, poughite, mackayite, scorodite, paratellurite, tellurite, baryte, gold, native tellurium. Distribution From the Tambo mine.
Prefix, meta, indicates the lower hydration state compared to tamboite.
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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