The discovery of new mineral species and type minerals from Brazil

Atencio, Daniel

doi:10.1590/23174889201500010011

Cited by 4 publications

(4 citation statements)

References 60 publications

(27 reference statements)

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“…These numbers from the database are lower than some published values (e.g. Atencio, 2015) owing to the exclusion of definitions based on nomenclature, pre-1917 minerals, and the "unknown" category. The totals for Russian sites are particularly low, since many U.S.S.R. mineral discovery papers from the Cold War era are deliberately vague in discussing the whereabouts of the type locality.…”

Section: Geological and Geographical Distribution Of New Mineral Findscontrasting

confidence: 60%

“…8). This is probably due to a combination of improved subsurface access and the fact that mines coincide with ore deposits, which ipso facto contain elevated concentrations of normally rare elements, important for the formation and discovery of previously unknown minerals (Khomyakov, 2011;Atencio, 2015). However, most exploration and mining activities do not appear to drive mineral discovery in a direct sense, as there is little correlation between (for instance) Cu prices or production and the discovery of related minerals (Fig.…”

Section: Geological and Geographical Distribution Of New Mineral Findsmentioning

confidence: 99%

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Trends in the discovery of new minerals over the last century

Barton

2019

American Mineralogist

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Patterns in the discovery and description of new minerals over the last century emerge from a new database of 4,046 mineral discovery reports (roughly ¾ of all known minerals). The number of new minerals discovered per year was steady over time from 1917 to the early 1950s, when it began a rapid increase punctuated by spikes in 1962-1969, 1978-1982, and 2008-2016, the last of which is probably still ongoing. A detailed breakdown of the technological, geographic, institutional, and other characteristics of mineral discovery in this dataset elucidates factors leading to increases in mineral discovery. (1) The availability of instrumentation for a particular analytical technique has

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Section: Geological and Geographical Distribution Of New Mineral Findscontrasting

confidence: 60%

Section: Geological and Geographical Distribution Of New Mineral Findsmentioning

confidence: 99%

Trends in the discovery of new minerals over the last century

Barton

2019

American Mineralogist

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“…It is an unusual gem, recognized for its ornamental qualities and of interest to gem and mineral collectors, though its perfect cleavage parallel to (010) makes it generally unsuitable for use in jewelry. The first specimen of euclase was found near Ouro Preto, brought to Europe in 1785 by Joseph Dombey and described and named by René-Just Haüy, from the greek words "eu" and "klasis" meaning "well-breaking" (Atencio, 2015). It is encountered as euhedral crystals in various hydrothermal contexts and granitic pegmatites This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.…”

Section: Introductionmentioning

confidence: 99%

Mn3+ and the pink color of gem-quality euclase from northeast Brazil

Gilles-Guéry,

Galoisy,

Schnellrath

et al. 2022

American Mineralogist

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Pink euclase of gem-quality and centimeter size, presenting an unusual pink-orange coloration and a pink to orange pleochroism, has been discovered near Livramento de Nossa Senhora, in Bahia State, Brazil. The origin of the pink coloration has been investigated using different spectroscopic techniques: UV-Vis-NIR spectroscopy, Electron Paramagnetic Resonance (EPR), luminescence and X-ray Absorption Near Edge Structure (XANES). The coloration is mainly due This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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“…This province is located at the East side of the Saõ Francisco craton, mainly in the state of Minas Gerais, but it encompasses also the states of Bahia, Espírito Santo and Rio de Janeiro (de Paiva, 1946;Putzer, 1976;Correia Nevez et al, 1986). Pegmatites from this area are famous for their first-quality gems, but also for mineral systematics since 48 valid mineral species were first described in Minas Gerais (Atencio, 2000(Atencio, , 2008(Atencio, , 2015.…”

Section: Introductionmentioning

confidence: 99%

Wilancookite, (Ba, K, Na)8 (Ba, Li, [])6 Be24 P24 O96·32H2O, a new beryllophosphate with a zeolite framework

Hatert

Philippo

Ottolini

et al. 2017

ejm

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Wilancookite, ideally (Ba,K,Na) 8 (Ba,Li,□) 6 Be 24 P 24 O 96 •32H 2 O, is a new mineral species from the Lavra Ponte do Piauí complex granitic pegmatite, Minas Gerais, Brazil. It occurs as tiny dodecahedral {1 1 0} crystals, deposited on moraesite fibres. Associated primary minerals are albite, montebrasite, Li-bearing micas, cassiterite, elbaite and quartz, while the secondary phosphate association contains fluorapatite, childrenite, eosphorite, zanazziite, greifenstenite, guimarãesite, ushkovite, saléeite and moraesite. The mineral is transparent and colourless, with a vitreous lustre; it is non-fluorescent, brittle, and its streak is white. The estimated Mohs hardness is 4-5, and the calculated density is 3.05 g/cm 3 . Wilancookite is isotropic, colourless, non-pleochroic, with n = 1.560(2) (measured under l = 590 nm). Electron-and ion-microprobe analyses give (in wt%): P 2 O 5 36.19, SiO 2 0.04, Al 2 O 3 0.41, BaO 34.65, Na 2 O 0.09, K 2 O 0.32, BeO 12.86, Li 2 O 0.50, and H 2 O calc 12.31, total 97.37 wt%. The resulting empirical formula, calculated on the basis of 96 anhydrous oxygen atoms, is (Ba 7.54 K 0.32 Na 0.14 ) S8.00 (Ba 3.04 Li 1.57 □ 1.39 ) S6.00 Be 24.08 (P 23.88 Al 0.38 Si 0.03 ) S24.29 O 96 •32H 2 O. The single-crystal unit-cell parameters are a = 13.5398(2) A and V = 2482.21(7) A 3 , space group I23. The eight strongest lines in the powder X-ray diffraction pattern [d(in A)(I)(hkl)] are: 6.90(60)(2 0 0), 5.54(80)(2 1 1), 3.630(60)(3 2 1, 3 1 2), 3.212(70) (3 3 0, 4 1 1), 3.043(100)(4 2 0, 4 0 2), 2.885(70)(3 3 2), 2.774(80)(4 2 2), and 2.398(60)(4 4 0). The crystal structure of wilancookite has been refined, based on single-crystal X-ray diffraction data, to R 1 = 4.58%; the beryllophosphate framework is similar to that occurring in pahasapaite, and is based on zeolite-RHO cages. The mineral species and name were approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA2015-034).

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The discovery of new mineral species and type minerals from Brazil

Cited by 4 publications

References 60 publications

Trends in the discovery of new minerals over the last century

Trends in the discovery of new minerals over the last century

Mn3+ and the pink color of gem-quality euclase from northeast Brazil

Wilancookite, (Ba, K, Na)8 (Ba, Li, [])6 Be24 P24 O96·32H2O, a new beryllophosphate with a zeolite framework

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