Gibbsite
Al(OH)₃
Oxides
Hardness —
· Monoclinic
Photo: John Veevaert, Trinity Mineral Company · CC BY 3.0
Ba₂MgZr₄(BaNb₁₂O₄₂) * ₁₂H₂O
Heteropolyniobate mineral
Named after Luiz A. D. Menezes Filho
Source: Wikidata
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