Correianevesite, Fe2+Mn22+(PO4)2{middle dot}3H2O, a new reddingite-group mineral from the Cigana mine, Conselheiro Pena, Minas Gerais, Brazil

Чуканов, Н. В.; Scholz, Ricardo; Zubkova, N. V.; Pekov, Igor V.; Belakovskiy, Dmitriy I.; Ван, К. В.; Lagoeiro, Leonardo Evangelista; Graça, Leonardo Martins; Oliveira, Luiz C.A.; Filho, Luiz Alberto Dias Menezes; Chaves, M. L. S. C.; Pushcharovsky, D.Y.

doi:10.2138/am.2014.4709

Cited by 11 publications

(9 citation statements)

References 10 publications

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“…The mineral belongs to the phosphoferrite group, phosphoferrite-reddingite series. As pointed out in Chukanov et al (2014) the structure of correianevesite conforms closely to the structural model of the phosphoferrite group minerals. This structure type was described by Moore et al (1980) in the same orthorhombic system, space group Pbna.…”

Section: Introductionsupporting

confidence: 73%

“…Correianevesite, Fe 2+ Mn 2+ 2(PO4)2•3H2O, was described for the first time at the Cigana granitic pegmatite (Conselheiro Pena, Minas Gerais, Brazil) by Chukanov et al (2014). This species was described in the orthorhombic system, space group Pbna with a = 9.48871( 16), b = 10.11494(17), c = 8.70624(16) (Å), V 835.61(3) (Å 3 ) and Z = 4.…”

Section: Introductionmentioning

confidence: 99%

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Crystal structure of correianevesite from the Emmons pegmatite, Uncle Tom Mountain, Greenwood, Oxford County, Maine

Vignola¹,

Demartin²,

Campostrini³

et al. 2021

Bull. Soc. Roy. Sc. de Liège

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Correianevesite, Fe2+Mn2+2(PO4)2·3H2O, is an uncommon secondary phosphate in granitic pegmatites. Described for the first time from the Cigana pegmatite (Conselheiro Pena, Brazil), it was subsequently reported only at the Berry-Havey pegmatite (Androscoggin County, Maine, U.S.A.). A single crystal from a new occurrence at the Emmons pegmatite, Oxford Co., Maine, gave the following unit cell unit cell parameters: a = 9.4872(19), b = 10.121(2), c = 8.7023(17) (Å), V 835.6(3) (Å3). The structure was anisotropically refined in the orthorhombic system, space group Pbna down to a R = 1.6% and the hydrogen-bond pattern could be determined. Microprobe chemical analysis, and bond valence calculation show the expected values for all the atomic sites and confirmed the valence of all ions in the structure.

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Section: Introductionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Crystal structure of correianevesite from the Emmons pegmatite, Uncle Tom Mountain, Greenwood, Oxford County, Maine

Vignola¹,

Demartin²,

Campostrini³

et al. 2021

Bull. Soc. Roy. Sc. de Liège

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“…Ele se cristaliza no sistema ortorrômbico e, em termos estruturais, contém camadas octaédricas em (100) formadas por cadeias paralelas ao eixo "c", compostas por dímeros de compartilhamento de bordas do poliedro M(2)O4(H2O)2 conectados através de bordas comuns com octaedros M(1)O4(H2O)2 isolados uns dos outros. Cadeias adjacentes são conectadas entre si pelos vértices do octaedro M(2), enquanto as camadas octaédricas vizinhas por tetraedros PO4 (Figura 5-C) (Chukanov et al, 2014). Sua composição química média compreende (% em peso): P2O5 34,59; MnO 29,21; FeO 21,74; H2O 12,60; Fe2O3 1,54 (total = 99,68) (Chukanov et al, 2014).…”

Section: Figura 3 A)unclassified

“…Cadeias adjacentes são conectadas entre si pelos vértices do octaedro M(2), enquanto as camadas octaédricas vizinhas por tetraedros PO4 (Figura 5-C) (Chukanov et al, 2014). Sua composição química média compreende (% em peso): P2O5 34,59; MnO 29,21; FeO 21,74; H2O 12,60; Fe2O3 1,54 (total = 99,68) (Chukanov et al, 2014).…”

Section: Figura 3 A)unclassified

“…Nas proximidades de Novo Horizonte, borda oeste da Chapada Diamantina (Figura 1), veios de quartzo ricos em drusas ou monocristais de quartzo com inclusões de rutilo e/ou hematita especular são explorados desde a década de 1990, cuja excepcionalidade tornou a região referência mundial para amostras destes tipos (Menezes Filho & Chaves, 2007). (conforme Chukanov et al, 2014).…”

Section: Almeidaítaunclassified

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Minerais Recentemente Descritos No Brasil: A Participação Do Centro De Pesquisa Prof. Manoel Teixeira Da Costa - Cpmtc, Instituto De Geociências (Ufmg)

Chaves

Romano

Filho³

2018

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Embora o potencial mineral do Brasil seja imenso e, por conseguinte, a possibilidade de encontro de novas espécies minerais nos empreendimentos minerários seja naturalmente alta, até 2010 somente 51 descobertas haviam sido verificadas no país. Entretanto, nos últimos sete anos, através de um projeto de Tese de Doutoramento realizado no Programa de Pós-Graduação em Geologia do IGC/UFMG, esta situação procurou ser mudada. Com ênfase em dois dos principais ambientes geológicos do Estado de Minas Gerais e adjacências, a Província Pegmatítica Oriental do Brasil e a Serra do Espinhaço, estudos foram conduzidos visando especificamente o encontro de novos minerais. Destacam-se os resultados extremamenete satisfatórios; nesses anos foram descobertos oito minerais, o que representa média de 1,3 mineral/ano, contrastando com os inexpressivos 0,2 mineral/ano verificados desde 1789 (ano em que o crisoberilo foi descrito). Os novos minerais são, incluindo seus códigos de identificação na International Mineralogical Association (IMA): carlosbarbosaíta [(UO2)2Nb2O6(OH)2.2H2O], IMA 2010-047; pauloabibita [NaNbO3], IMA 2012-090; cesarferreiraíta [Fe2+Fe3+2(AsO4)2(OH)2.8H2O], IMA 2012-099; correianevesita [Fe2+Mn2+2(PO4)2.3H2O], IMA 2013-007; almeidaíta [Pb(Mn,Y)Zn2(Ti,Fe3+)18O36(O,OH)2], IMA 2013-020; wilancookita [(Ba,K,Na)8(Ba,Li,[])6Be24P24O96.3H2O], IMA 2015-034; parisita-(La) [CaLa2(CO3)3F2], IMA 2016-031; e brandãoita [BeAl2(PO4)2(OH)2(H2O)4], IMA 2016-071a. Este foi o primeiro programa de pesquisa desenvolvido no país voltado especialmente para a descoberta de novos minerais, tendo alcançado pleno êxito.Palavras Chave: Novos minerais, Centro de Pesquisa Prof. Manoel Teixeira da Costa, (IGC-UFMG), BrasilAbstract:RECENT MINERALS DESCRIBED IN BRAZIL: PARTICIPATION OF THE CENTRO DE PESQUISA PROF. MANOEL TEIXEIRA DA COSTA - CPMTC, GEOSCIENCES INSTITUTE (UFMG). Although the mineral potential of Brazil is immense and, consequently, the possibility of finding new mineral species in mining projects is obviously high, until 2010 only 51 discoveries had been verified in this country. However, in the last seven years, through a PhD Thesis project carried at the Postgraduate in Geology Program of the IGC/UFMG, this situation has been modified. With emphasis on two of the main geological environments of Minas Gerais State and surrounding regions, the Eastern Brazil Pegmatite Province and the Espinhaço Mountain Range, studies were conducted specifically aimed at finding new minerals. The results are extremely satisfactory; in those years eight minerals were discovered, representing an average of 1.3 mineral/year, contrasting with the inexpressive 0.2 mineral/year verified since 1789 (year of chrysoberyl description). The new minerals are, including their identification codes in the International Mineralogical Association (IMA): carlosbarbosaite [(UO2)2Nb2O6(OH)2.2H2O], IMA 2010-047; pauloabibite [NaNbO3], IMA 2012-090; cesarferreiraita [Fe2+Fe3+2(AsO4)2(OH)2.8H2O], IMA 2012-099; correianevesite [Fe2+Mn2+2(PO4)2.3H2O], IMA 2013-007; almeidaite [Pb(Mn,Y)Zn2(Ti,Fe3+)18O36(O,OH)2], IMA 2013-020; wilancookite [(Ba,K,Na)8(Ba,Li,[])6Be24P24O96.3H2O], IMA 2015-034; parisite-(La) [CaLa2(CO3)3F2], IMA 2016-031; and brandãoite [BeAl2(PO4)2(OH)2(H2O)4], IMA 2016-071a. This was the first research program developed in the country focused especially on the discovery of new minerals, reaching full success.Keywords: New minerals, Prof. Manoel Teixeira da Costa Research Center (IGC-UFMG), Brazil.

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Microbial degradation of Pleistocene permafrost-sealed fossil mammal remains

Calábková

Chlachula²,

Ivanov³

et al. 2022

Quat. res.

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Paleontological remains retrieved from permafrost represent the most informative records of Pleistocene ecosystems. Different levels of past microbial activity affecting fossil material preservation are presented for two selected bone samples—an almost intact Bison sp. metacarpus (45.0 ± 5.0 14C ka BP) and a weathered Equus sp. metacarpus (37.8 ± 1.7 14C ka BP) from the recently exposed cryogenic geo-contexts in the Yana River basin, NE Yakutia. Diagenetic changes in bone porosity and chemical composition as a result of the past microbial activity were investigated by multiple analytical methods. In the bison bone, which was permafrost-sealed shortly after death of the animal and conserved for ca. 45 ka in a frozen state in a cryolithic formation, only superficial microbial degradation processes were detected. Progressive microbial attacks characterize the horse bone, which was exposed to MIS 3 sub-aerial biogenic decay and modern surficial weathering. This is evidenced by extensive bacterial micro-boring with the typical focal destructions, an increase in microbial porosity, and de-mineralized osseous zones due to waterlogged and poorly oxygenated past depositional conditions. New information contributes to better understanding of the diagenesis particularities and the associated chemical and biological agents of the fossil osteological assemblages with respect to their taphonomic and paleoenvironmental implications.

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Correianevesite, Fe2+Mn22+(PO4)2{middle dot}3H2O, a new reddingite-group mineral from the Cigana mine, Conselheiro Pena, Minas Gerais, Brazil

Cited by 11 publications

References 10 publications

Crystal structure of correianevesite from the Emmons pegmatite, Uncle Tom Mountain, Greenwood, Oxford County, Maine

Crystal structure of correianevesite from the Emmons pegmatite, Uncle Tom Mountain, Greenwood, Oxford County, Maine

Minerais Recentemente Descritos No Brasil: A Participação Do Centro De Pesquisa Prof. Manoel Teixeira Da Costa - Cpmtc, Instituto De Geociências (Ufmg)

Microbial degradation of Pleistocene permafrost-sealed fossil mammal remains

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