Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Leon Hupperichs · CC BY-SA 3.0
(Pb,Ca)₂.₄Fe³⁺₂(Si₄O₁₀)(CO₃)₁.₇(OH)₃·nH₂O
Smectite, phyllosilicate mineral
Named after iron(III)
Source: Wikidata
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