Uncommon Nb-tantalate from the Cachoeira mine, Araçuaí pegmatite district (Minas Gerais) Article Swipe
Coralie Heinis Dias
,
Mario Luiz de Sá Carneiro Chaves
·
YOU?
·
· 2015
· Open Access
·
· DOI: https://doi.org/10.1590/0370-44672014680227
YOU?
·
· 2015
· Open Access
·
· DOI: https://doi.org/10.1590/0370-44672014680227
"Important spodumene-rich pegmatites have been mined by CBL (Companhia Brasileira de Lítio, Brazilian Lithium Co.) at the Cachoeira mine (northeastern Minas Gerais state) since the 1990's. In this deposit, black platy crystals resembling columbitetantalite are also found; they were analyzed by electronic microprobe as part of the first author’s master’s degree dissertation. The Cachoeira pegmatite group comprises several spodumene-rich bodies that consist of pertitic microcline, spodumene (on average 23vol%), albite, quartz and muscovite, totalizing more than 95% of the bodies’ volume. Analyses on 27 samples of supposedly Nb-tantalates showed a high variation of Ta, Nb and Sn contents, which has been observed inclusive in individual crystals, causing color variation on backscattered electrons images. Surprisingly, analyses on some grains also revealed the presence of ixiolite, a mineral species that has never been described in that region; it is characterized by high SnO2 contents (up to ~16wt%). Columbite-(Fe) phase represents 42% of total Nb-tantalates analyzed samples, tantalite-( Fe) 19%, columbite-(Mn) 3% and ixiolite, 36%. Cassiterite, also observed, shows significant Ta2O5 contents, probably indicating general exsolution processes."
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1590/0370-44672014680227
- http://www.scielo.br/pdf/rem/v68n4/0370-4467-rem-68-04-0401.pdf
- OA Status
- diamond
- Cited By
- 1
- References
- 13
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2292790794
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2292790794Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1590/0370-44672014680227Digital Object Identifier
- Title
-
Uncommon Nb-tantalate from the Cachoeira mine, Araçuaí pegmatite district (Minas Gerais)Work title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2015Year of publication
- Publication date
-
2015-11-20Full publication date if available
- Authors
-
Coralie Heinis Dias, Mario Luiz de Sá Carneiro ChavesList of authors in order
- Landing page
-
https://doi.org/10.1590/0370-44672014680227Publisher landing page
- PDF URL
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https://www.scielo.br/pdf/rem/v68n4/0370-4467-rem-68-04-0401.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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diamondOpen access status per OpenAlex
- OA URL
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https://www.scielo.br/pdf/rem/v68n4/0370-4467-rem-68-04-0401.pdfDirect OA link when available
- Concepts
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Pegmatite, Spodumene, Columbite, Albite, Topaz, Cassiterite, Microcline, Platy, Mineralogy, Muscovite, Geochemistry, Electron microprobe, Mineral, Geology, Quartz, Tantalate, Materials science, Metallurgy, Ceramic, Tin, Composite material, Optoelectronics, Dielectric, FerroelectricityTop concepts (fields/topics) attached by OpenAlex
- Cited by
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1Total citation count in OpenAlex
- Citations by year (recent)
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2020: 1Per-year citation counts (last 5 years)
- References (count)
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13Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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