Almeidaite - Crichtonite Group member

Availability

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Size

1.5 x 1 x 0.3 cm - Thumbnail 

Formula

PbZn₂(Mn,Y)(TI,Fe³⁺)₁₈O₃₇(OH,O) (RRUFF)

Locality

Mula claim, Tapera, Novo Horizonte, Bahia, Brazil

Tagged

REE mineral

Almeidaite is a five-locality mineral first found at this locality, the Mula claim in Novo Horizonte.  It is a member of the Crichtonite group said to include thirteen complex titanites often containing uranium, lead and rare earth elements such as yttrium, cerium, lanthanum. It is formed from hydrothermaly altered dacites in the presence of rutile and hematite. It is often confused with ilmenite and hematite. Simple physical tests will distinguish theses minerals from Almeidaite however. 

Type Locality