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tetra-ferriphlogopite

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Journal Article

Local and average Fe distribution in trioctahedral micas : Analysis of Fe K -edge XANES spectra in the phlogopite-annite and phlogopite-tetra-ferriphlogopite joins on the basis of single-crystal XRD refinements

Francesca TOMBOLINI, Maria Franca BRIGATTI, Augusto MARCELLI, Giannantonio CIBIN, Annibale MOTTANA, Gabriele GIULI
Published: 01 November 2002
European Journal of Mineralogy (2002) 14 (6): 1075–1085.
DOI: https://doi.org/10.1127/0935-1221/2002/0014-1075
... addresses the three end-members phlogopite, annite and tetra-ferriphlogopite, used as reference materials, and enters later in the interpretation of nine trioctahedral micas intermediate in composition along the joins phlogopite-tetra-ferriphlogopite and phlogopite-annite. A detailed analysis...
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View PDF for article title, Local and average Fe distribution in trioctahedral micas : Analysis of Fe K -edge XANES spectra in the phlogopite-annite and phlogopite-<span class="search-highlight">tetra</span>-<span class="search-highlight">ferriphlogopite</span> joins on the basis of single-crystal XRD refinements
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Journal Article

Experimental and theoretical XANES and EXAFS study of tetra-ferriphlogopite

Gabriele GIULI, Eleonora PARIS, Ziyu WU, Maria Franca BRIGATT, Giannantonio CIBIN, Annibale MOTTANA, Augusto MARCELLI
Published: 01 November 2001
European Journal of Mineralogy (2001) 13 (6): 1099–1108.
DOI: https://doi.org/10.1127/0935-1221/2001/0013-1099
...Gabriele GIULI; Eleonora PARIS; Ziyu WU; Maria Franca BRIGATT; Giannantonio CIBIN; Annibale MOTTANA; Augusto MARCELLI Abstract Experimental and theoretical EXAFS and XANES data on Fe coordination and bond distances have been obtained for a natural tetra-ferriphlogopite. XANES data show...
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View PDF for article title, Experimental and theoretical XANES and EXAFS study of <span class="search-highlight">tetra</span>-<span class="search-highlight">ferriphlogopite</span>
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Journal Article

CRYSTAL CHEMISTRY AND SURFACE CONFIGURATIONS OF TWO IRON-BEARING TRIOCTAHEDRAL MICA-1 M POLYTYPES

Chiara Elmi, Maria Franca Brigatti, Stephen Guggenheim, Luca Pasquali, Monica Montecchi, Stefano Nannarone
Published: 01 August 2014
Clays and Clay Minerals (2014) 62 (4): 243–252.
DOI: https://doi.org/10.1346/CCMN.2014.0620401
.... a tetra-ferriphlogopite from an alkaline-carbonatitic complex near Tapira, Belo Horizonte, Minas Gerais, Brazil, and an Fe 2+ -bearing phlogopite containing less tetrahedral Fe 3+ from the Kovdor carbonatite-bearing, alkaline-ultrabasic complex, Kola Peninsula, Russia, are explored here. Mineral-surface...
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View PDF for article title, CRYSTAL CHEMISTRY AND SURFACE CONFIGURATIONS OF TWO IRON-BEARING TRIOCTAHEDRAL MICA-1 M POLYTYPES
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a) Mean &lt;T–O&gt; bond-distance versus Xtetra-ferriphlogopite. b) Mean proportion of unshared edges at the M2 site (eu(M2)) versus Xtetra-ferriphlogopite. c) Tetrahedron rotation angle, α, versus the proportion of the tetra-ferriphlogopite end member (Xtetra-ferriphlogopite). Filled symbols refer to trioctahedral micas from this study, whereas open symbols refer to trioctahedral mica crystals from Brigatti et al. (1996a, b, 1999). Samples from the Tapira complex: crosses: dunite, circles: bebedourite, diamonds enclosing a cross: perovskite magnetitite, diamonds: glimmerite, squares: garnet magnetitite, star: clinopyroxenite. Titanian phlogopite from Presidente Olegario lavas: triangle pointing up, ferroan [4]Fe3+-bearing phlogopite from Limeira I: triangle pointing down, tetra-ferriphlogopite of Hazen et al.(1981): hexagon, tetra-ferriphlogopite of Semenova et al.(1977): hexagon enclosing a cross.

a) Mean <T–O> bond-distance versus X tetra-ferriphlogopite . b) Mea...

Published: 01 October 2001
F ig . 3. a) Mean <T–O> bond-distance versus X tetra-ferriphlogopite . b) Mean proportion of unshared edges at the M 2 site (e u(M2) ) versus X tetra-ferriphlogopite . c) Tetrahedron rotation angle, α, versus the proportion of the tetra-ferriphlogopite end member (X tetra
Journal Article

HENRYMEYERITE, A NEW HOLLANDITE-TYPE Ba–Fe TITANATE FROM THE KOVDOR COMPLEX, RUSSIA

Roger H. Mitchell, Viktor N. Yakovenchuk, Anton R. Chakhmouradian, Peter C. Burns, Yakov A. Pakhomovsky
Published: 01 June 2000
The Canadian Mineralogist (2000) 38 (3): 617–626.
DOI: https://doi.org/10.2113/gscanmin.38.3.617
...Roger H. Mitchell; Viktor N. Yakovenchuk; Anton R. Chakhmouradian; Peter C. Burns; Yakov A. Pakhomovsky Abstract A new hollandite-type titanate, henrymeyerite, occurs in a vein of tetra-ferriphlogopite – calcite – dolomite carbonatite of the Kovdor alkaline ultramafic complex, Kola Peninsula...
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Fe2p spectrum with the curve fit obtained for tetra-ferriphlogopite (a). The spectrum is displayed as a plot of electron binding energy vs. intensity (the number of electrons per second in a fixed and small energy interval). The Fe3+ and Fe2+ multiplet peaks are labeled on the spectrum. Fesat3+ and Fesat2+ refer to the associated satellite peaks of Fe3+ and Fe2+, respectively. Fe2p spectrum obtained for Fe-bearing phlogopite (b). Dotted lines: experimental spectra; solid lines: deconvoluted peaks. See text for additional explanations.

Fe 2p spectrum with the curve fit obtained for tetra-ferriphlogopite (a). ...

Published: 01 August 2014
Figure 4 Fe 2p spectrum with the curve fit obtained for tetra-ferriphlogopite (a). The spectrum is displayed as a plot of electron binding energy vs . intensity (the number of electrons per second in a fixed and small energy interval). The Fe 3+ and Fe 2+ multiplet peaks are labeled
Image
K2p spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs. intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: deconvoluted peaks. See text for additional explanations.

K 2p spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) di...

Published: 01 August 2014
Figure 5 K 2p spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs . intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: deconvoluted peaks. See text
Image
Si2p spectrum of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs. intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: fitted spectra.

Si 2p spectrum of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) ...

Published: 01 August 2014
Figure 1 Si 2p spectrum of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs . intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: fitted spectra.
Image
Mg1s spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs. intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: fitted spectra.

Mg 1s spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) d...

Published: 01 August 2014
Figure 3 Mg 1s spectra of tetra-ferriphlogopite (a) and Fe-bearing phlogopite (b) displayed as a plot of electron binding energy vs . intensity (the number of electrons per second in a fixed and small energy interval). Dotted lines: experimental spectra; solid lines: fitted spectra.
Image
Angle-dependent K K-XANES spectra recorded on tetra-ferriphlogopite Tas22-1 (Tapira, Minas Gerais, Brazil) at various 𝛉 angles (inset: enlargement of the FMS to IMS section for two extreme rotations).

Angle-dependent K K -XANES spectra recorded on tetra-ferriphlogopite Tas22...

Published: 01 July 2006
F igure 3. Angle-dependent K K -XANES spectra recorded on tetra-ferriphlogopite Tas22-1 (Tapira, Minas Gerais, Brazil) at various 𝛉 angles (inset: enlargement of the FMS to IMS section for two extreme rotations).
Image
Changes in a Tapira tetra-ferriphlogopite Si K-edge spectrum due to changing the orientation of the same crystal blade against the impinging, horizontally-polarized synchrotron radiation beam. In the right panel a magnified view of the changes undergone by the edge and FMS regions.

Changes in a Tapira tetra-ferriphlogopite Si K- edge spectrum due to chang...

Published: 01 January 2002
Figure 11. Changes in a Tapira tetra-ferriphlogopite Si K- edge spectrum due to changing the orientation of the same crystal blade against the impinging, horizontally-polarized synchrotron radiation beam. In the right panel a magnified view of the changes undergone by the edge and FMS regions.
Image
Changes in a Tapira tetra-ferriphlogopite Fe K-edge spectrum due to changing the orientation of the same crystal blade against the impinging, horizontally-polarized synchrotron radiation beam. In the right panel a magnified view of the changes undergone by the edge (top) and FMS and IMS regions (bottom).

Changes in a Tapira tetra-ferriphlogopite Fe K- edge spectrum due to chang...

Published: 01 January 2002
Figure 14. Changes in a Tapira tetra-ferriphlogopite Fe K- edge spectrum due to changing the orientation of the same crystal blade against the impinging, horizontally-polarized synchrotron radiation beam. In the right panel a magnified view of the changes undergone by the edge (top) and FMS
Image
Experimental XANES spectra at the Fe K-edge of tetra-ferriphlogopite and other crystalline compounds used as standards for coordination or oxidation state. The edge position for each spectrum is marked by a vertical line.

Experimental XANES spectra at the Fe K-edge of tetra-ferriphlogopite and ot...

Published: 01 November 2001
Fig. 1. Experimental XANES spectra at the Fe K-edge of tetra-ferriphlogopite and other crystalline compounds used as standards for coordination or oxidation state. The edge position for each spectrum is marked by a vertical line.
Image
The total theoretical XANES spectrum of tetra-ferriphlogopite compared with the experimental: a good agreement is demonstrated by the correspondence of all the peaks in the two spectra.

The total theoretical XANES spectrum of tetra-ferriphlogopite compared with...

Published: 01 November 2001
Fig. 2. The total theoretical XANES spectrum of tetra-ferriphlogopite compared with the experimental: a good agreement is demonstrated by the correspondence of all the peaks in the two spectra.
Image
a) EXAFS spectrum of tetra-ferriphlogopite fitted with the theoretical signal shows that all the major contributions have been taken into consideration (see residual). b) the Fourier transform (not corrected for the phase shift in figure) shows the Fe-O distance at 1.86 Å and the signals coming from the longer distances.

a) EXAFS spectrum of tetra-ferriphlogopite fitted with the theoretical sign...

Published: 01 November 2001
Fig. 3. a) EXAFS spectrum of tetra-ferriphlogopite fitted with the theoretical signal shows that all the major contributions have been taken into consideration (see residual). b) the Fourier transform (not corrected for the phase shift in figure) shows the Fe-O distance at 1.86 Å and the signals
Image
Variation in unit-cell parameter a versus Xtetra-ferriphlogopite. Symbols as in Figure 3.

Variation in unit-cell parameter a versus X tetra-ferriphlogopite . Symbo...

Published: 01 October 2001
F ig . 7. Variation in unit-cell parameter a versus X tetra-ferriphlogopite . Symbols as in Figure 3 .
Journal Article

MAJOR- AND TRACE-ELEMENT COMPOSITION OF OLIVINE, PEROVSKITE, CLINOPYROXENE, Cr–Fe–Ti OXIDES, PHLOGOPITE AND HOST KAMAFUGITES AND KIMBERLITES, ALTO PARANAÍBA, BRAZIL

Leone Melluso, Michele Lustrino, Excelso Ruberti, Pietro Brotzu, Celso de Barros Gomes, Lucio Morbidelli, Vincenzo Morra, Darcy P. Svisero, Fosco d’Amelio
Published: 01 February 2008
The Canadian Mineralogist (2008) 46 (1): 19–40.
DOI: https://doi.org/10.3749/canmin.46.1.19
... contents, likely due to the different position of this phase in the crystallization sequence; Sc reaches values as high as 200 ppm, whereas the lanthanides show very variable enrichment in light over heavy REE, and commonly show a negative Eu anomaly. The olivine, phlogopite (and tetra-ferriphlogopite), Cr...
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View PDF for article title, MAJOR- AND TRACE-ELEMENT COMPOSITION OF OLIVINE, PEROVSKITE, CLINOPYROXENE, Cr–Fe–Ti OXIDES, PHLOGOPITE AND HOST KAMAFUGITES AND KIMBERLITES, ALTO PARANAÍBA, BRAZIL
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Journal Article

CRYSTAL CHEMISTRY OF TRIOCTAHEDRAL MICAS-1 M FROM THE ALTO PARANAÍBA IGNEOUS PROVINCE, SOUTHEASTERN BRAZIL

Maria Franca Brigatti, Luca Medici, Luciano Poppi, Carmela Vaccaro
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1333–1345.
DOI: https://doi.org/10.2113/gscanmin.39.5.1333
...F ig . 3. a) Mean <T–O> bond-distance versus X tetra-ferriphlogopite . b) Mean proportion of unshared edges at the M 2 site (e u(M2) ) versus X tetra-ferriphlogopite . c) Tetrahedron rotation angle, α, versus the proportion of the tetra-ferriphlogopite end member (X tetra...
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View PDF for article title, CRYSTAL CHEMISTRY OF TRIOCTAHEDRAL MICAS-1 M FROM THE ALTO PARANAÍBA IGNEOUS PROVINCE, SOUTHEASTERN BRAZIL
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Journal Article

An alternative method of calculating cleavage energy: The effect of compositional domains in micas

Maria Franca Brigatti, Chiara Elmi, Stephen Guggenheim, Daniele Malferrari, Marco Poppi
Published: 01 December 2016
American Mineralogist (2016) 101 (12): 2738–2746.
DOI: https://doi.org/10.2138/am-2016-5828
...-ferriphlogopite–tetra-ferri-annite, polylithionite–siderophyllite, muscovite–celadonite, and muscovite–paragonite. A lack of homogeneity in composition may produce preferential cleavage locations within the family of (001) planes. The cleavage energy appears to be greater for homogeneous synthetic micas compared...
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Journal Article

Trioctahedral Fe-rich micas: Relationships between magnetic behavior and crystal chemistry

Maria Franca Brigatti, Marco Affronte, Chiara Elmi, Daniele Malferrari, Angela Laurora
Published: 01 October 2015
American Mineralogist (2015) 100 (10): 2231–2241.
DOI: https://doi.org/10.2138/am-2015-5145
... 2/ m ), two are Mg-rich annite and two are Fe-rich phlogopite, one is a tetra-ferriphlogopite (space group C 2/ m ) and one is Li-rich siderophyllite (space group C 2). Thus these samples had a different environment around the Fe cations and layer symmetry. These micas were characterized by chemical...
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View PDF for article title, Trioctahedral Fe-rich micas: Relationships between magnetic behavior and crystal chemistry
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