Tomiolloite

tomiolloite

tellurite

tellurium

Moctezuma

Images

Formula: Al₁₂(Te⁴⁺O₃)₅[(SO₃))_0.5(SO₄)_0.5](OH)₂₄
Tellurite
Crystal System: Hexagonal
Specific gravity: 3.374 calculated
Hardness: 3
Streak: White
Colour: White
Luminescence: No fluorescence observed under UV
Environments

Hydrothermal environments

Tomiolloite is a new mineral, approved in 2021 and to date (December 2024) reported only from the type locality.

Localities

At the type locality, the Moctezuma Mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico, tomiolloite forms roughly spherical clusters of crystals comprised of very thin, needle-like crystals (1 μm diameter, ~40 μm length) around a core of small, stubbier, broken crystals. Tomiolloite is generally found growing on tellurite or quartz. Significant Te⁶⁺ substitution for Al³⁺ is observed (AM 107.2167-2175).
Tomiolloite from Moctezuma - Image

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