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almeidaite

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Journal Article
Published: 01 April 2015
Mineralogical Magazine (2015) 79 (2): 269–283.
...; Luiz C. A. de Oliveira; José D. Ardisson Abstract Almeidaite (IMA 2013-020), ideally Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH) 2 , from Novo Horizonte, Bahia, Brazil, occurs in association with quartz, rutile, anatase, hematite, kaolinite, muscovite, xenotime-(Y) and bastnaesite-(La). Almeidaite forms...
FIGURES | View All (9)
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The IR spectrum of <b>almeidaite</b>.
Published: 01 April 2015
F ig . 7. The IR spectrum of almeidaite.
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Reflectance curves of <b>almeidaite</b> in the visible range.
Published: 01 April 2015
F ig . 4. Reflectance curves of almeidaite in the visible range.
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A crystal of <b>almeidaite</b> (23 mm × 22 mm × 6 mm).
Published: 01 April 2015
F ig . 1. A crystal of almeidaite (23 mm × 22 mm × 6 mm).
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Mössbauer spectra of <b>almeidaite</b> obtained at room temperature (RT) and at 80...
Published: 01 April 2015
F ig . 6. Mössbauer spectra of almeidaite obtained at room temperature (RT) and at 80 K.
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Ideal <b>almeidaite</b> crystal (untwinned) based on the forms in  Table 1  and ob...
Published: 01 April 2015
F ig . 2. Ideal almeidaite crystal (untwinned) based on the forms in Table 1 and observations of their relative prominence on actual crystals.
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Reflectance curve of <b>almeidaite</b> obtained with polarized radiation in the IR...
Published: 01 April 2015
F ig . 5. Reflectance curve of almeidaite obtained with polarized radiation in the IR range from crystal sections parallel to the c axis.
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Polyhedral layers in <b>almeidaite</b> viewed down the  c  axis, for ( a )  c  ≈ 0...
Published: 01 April 2015
F ig . 9. Polyhedral layers in almeidaite viewed down the c axis, for ( a ) c ≈ 0.06; ( b ) c ≈ 0.16; ( c ) c ≈ 0.26; ( d ) c ≈ 0.39; and ( e ) c ≈ 0.49.
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The arrangement of cationic sites along the three-fold axis in <b>almeidaite</b>. ...
Published: 01 April 2015
F ig . 8. The arrangement of cationic sites along the three-fold axis in almeidaite. The sites M 0– M 5 and the additional M 6 site are denoted after Armbruster and Kunz ( 1990 ).
Journal Article
Published: 01 February 2018
Mineralogical Magazine (2018) 82 (1): 133–144.
... ) 3 F 2 , occurs in a hydrothermal vein crosscutting a metarhyolite of the Rio dos Remédios Group, at the Mula mine, Tapera village, Novo Horizonte county, Bahia, Brazil, associated with hematite, rutile, almeidaite, fluocerite-(Ce), brockite, monazite-(La), rhabdophane-(La) and bastnäsite-(La...
FIGURES | View All (7)
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Twinned <b>almeidaite</b> crystal, drawn from digital images of an actual specimen...
Published: 01 April 2015
F ig . 3. Twinned almeidaite crystal, drawn from digital images of an actual specimen. Faces in dark grey are part of the re-entrant or concave region of the twin. Faces in light grey are pairwise co-planar. Left and right edges of the drawn region are boundaries with additional twin domains.
Journal Article
Published: 01 April 2016
American Mineralogist (2016) 101 (4): 1012–1019.
...Dmitriy I. Belakovskiy; Yulia Uvarova; Olivier C. Gagne © 2016 Mineralogical Society of America 2016 This New Mineral Names has entries for 14 new mineral species, including almeidaite, barlowite, barrydawsonite-(Y), bluebellite, bonazziite, braccoite, chanabayaite, favreauite...
Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 331–338.
... (M6–M9) with low occupancies, which also exist in some species of the crichtonite group, such as U-rich senaite ( Armbruster & Kunz, 1990 ), dessauite ( Orlandi et al. , 1997 ), mapiquiroite ( Biagioni et al. , 2014 ), and almeidaite ( Menezes et al. , 2015 ). Nevertheless, assignment of Fe...
Journal Article
Published: 01 August 2013
Mineralogical Magazine (2013) 77 (6): 2695–2709.
..., A.W., de Oliveira, L.C.A., Ardisson, J.D., Krambrock, K., Moreira, R.L., Guimarães, F.S., Persiano, A.C. and Richards, R.P. (2013) Almeidaite, IMA 2013-020. CNMNC Newsletter No. 16, 2013, page 2705; Mineralogical Magazine , 77 , 2695–2709. IMA No. 2013-021 Minjiangite Ba[Be 2 P 2 O 8...
Journal Article
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 972–975.
... of metasomatic processes and probably has a hydrothermal origin. Ferricoronadite is one of the latest minerals in this association. Other associated minerals include As-rich fluorapatite, dolomite, Zn-bearing talc, almeidaite, hydroxycalcioroméite, zircon, quartz, and scheelite. In oxide zones zincovelesite-6 N...
Journal Article
Published: 01 March 2018
European Journal of Mineralogy (2018) 30 (2): 323–332.
... oxygen-bearing minerals (Zn-spinels, Zn- and Sb-rich members of the högbomite supergroup, nežilovite, ferricoronadite, piemontite-(Pb), almeidaite, hydroxyplumboroméite etc .) or immobilization and the absence of sulfides in the orogenic zone of the Pelagonian massif can be suggested: S 2–  + 2O 2 ↔ SO...
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Journal Article
Published: 01 December 2017
American Mineralogist (2017) 102 (12): 2525–2531.