Rio Pomba is a municipality in the Brazilian state of Minas Gerais, founded on 25 December 1767. The municipality is located at a mean altitude of 441 m.

Specimens labeled as being from this locality may be from a pegmatite district around the cities of Rio Pomba and Ubá; it was an important producer of euxenite, polycrase, samarskite, etc., until the late 1970s, when Comissão Nacional de Energia Nuclear (the Brazilian atomic energy department) was buying this material to produce small amounts of U, Th and rare earths; this project was abandoned on the beginning of the 1980s and all those pegmatites were soon abandoned, except the ones that could also produce kaolin of good grade.

Luiz Mineses 2010.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Euxenite-(Y)

ⓘ Samarskite-(Y)

2 valid minerals.

Detailed Mineral List:

ⓘ Euxenite-(Y)

Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆

References:

Polycrase specimen in the British Museum of Natura History #1927,177 [Rock Currier 2010]

ⓘ Samarskite-(Y)

Formula: YFe³⁺Nb₂O₈

References:

Polycrase specimen in the British Museum of Natura History #1927,177 [Rock Currier 2010]

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Samarskite-(Y)	4.DB.25	YFe³⁺Nb₂O₈
ⓘ	Euxenite-(Y)	4.DG.05	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆

List of minerals for each chemical element

O	Oxygen
O	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
O	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Ca	Calcium
Ca	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Ti	Titanium
Ti	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Fe	Iron
Fe	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Y	Yttrium
Y	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Y	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Nb	Niobium
Nb	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Nb	ⓘ Samarskite-(Y)	YFe³⁺Nb₂O₈
Ce	Cerium
Ce	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Ta	Tantalum
Ta	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Th	Thorium
Th	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
U	Uranium
U	ⓘ Euxenite-(Y)	(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Rio_Pomba
Wikidata ID:	Q22065221
GeoNames ID:	6321728

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Rio Pomba, Minas Gerais, BraziliRegional Level TypesRio PombaMunicipality Minas GeraisState BrazilCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }