К минералам

RRUFF #6157

Almeidaite

Элементы:PbZnMnYTiFeOH
Valence:Pb^2+Zn^2+Mn^2+YTi^4+Fe^3+OH

Химия

IMA chemistry:
PbZn2(Mn,Y)(Ti,Fe3+)18O36(OH,O)2
Valence chemistry:
Pb2+Zn2+2(Mn2+,Y)(Ti4+,Fe3+)18O36(OH,O)2

Классификация

Crystal systems:
hexagonal
Space groups:
R3
Structural group:
Crichtonite
IMA status:
Approved

Происхождение

Country:
Brazil
Published:
2013
Oldest age Ma:
1192
Paragenetic modes:
Abiotic, Primary, Secondary, Stage 4a: Earth's earliest continental crust, PM23 - Subaerial alteration, PM32 - Ba-Mn-Pb-Zn metamorphics, Stage 4b: Highly evolved igneous rocks, PM35 - Ultra-alkali and agpaitic igneous rocks

Примечания

Menezes L A D, Chukanov N V, Rastsvetaeva R K, Aksenov S M, Pekov I V, Chaves M L S C, Richards R P, Atencio D, Brandão P R G, Scholz R, Krambrock K, Moreira R L, Guimarães F S, Romano A W, Persiano A C, de Oliveira L C A, Ardisson J D (2015) Almeidaite, Pb(Mn,Y)Zn2(Ti,Fe3+)18O36(O,OH)2, a new crichtonite-group mineral, from Novo Horizonte, Bahia, Brazil. Mineralogical Magazine 79, 269-283