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dmitryvarlamovite

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Journal Article

Dmitryvarlamovite, Ti 2 (Fe 3+ Nb)O 8 , a new columbite-supergroup mineral related to the wolframite group

Oksana V. Udoratina, Taras L. Panikorovskii, Nikita V. Chukanov, Mikhail V. Voronin, Vladimir P. Lutoev, Atali A. Agakhanov, Sergey I. Isaenko
Published: 01 February 2024
Mineralogical Magazine (2024) 88 (2): 147–154.
DOI: https://doi.org/10.1180/mgm.2023.95
...Oksana V. Udoratina; Taras L. Panikorovskii; Nikita V. Chukanov; Mikhail V. Voronin; Vladimir P. Lutoev; Atali A. Agakhanov; Sergey I. Isaenko Abstract The new columbite-supergroup mineral dmitryvarlamovite, ideally Ti 2 (Fe 3+ Nb)O 8 , was discovered in weathered alkaline metasomatic assemblages...
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Associations of <span class="search-highlight">dmitryvarlamovite</span> (Dmv) with monazite-(Ce) (Mnz-Ce), columb...

Associations of dmitryvarlamovite (Dmv) with monazite-(Ce) (Mnz-Ce), columb...

Published: 01 February 2024
Figure 2. Associations of dmitryvarlamovite (Dmv) with monazite-(Ce) (Mnz-Ce), columbite-(Fe) (Clb-Fe) and a phase with the simplified formula FeNbO 4 (presumably, rossovskyite dimorph isostructural with dmitryvarlamovite). Back-scattered electron images of polished sections. The abbreviations
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Raman spectrum of <span class="search-highlight">dmitryvarlamovite</span>.

Raman spectrum of dmitryvarlamovite.

Published: 01 February 2024
Figure 4. Raman spectrum of dmitryvarlamovite.
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Crystal data and structure refinement for <span class="search-highlight">dmitryvarlamovite</span>

Crystal data and structure refinement for dmitryvarlamovite

Published: 01 February 2024
Table 1. Crystal data and structure refinement for dmitryvarlamovite
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Comparative data for <span class="search-highlight">dmitryvarlamovite</span> and related wolframite-group mineral...

Comparative data for dmitryvarlamovite and related wolframite-group mineral...

Published: 01 February 2024
Table 9. Comparative data for dmitryvarlamovite and related wolframite-group minerals.
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Powder infrared absorption spectra of: ( a ) <span class="search-highlight">dmitryvarlamovite</span> with admixtu...

Powder infrared absorption spectra of: ( a ) dmitryvarlamovite with admixtu...

Published: 01 February 2024
Figure 3. Powder infrared absorption spectra of: ( a ) dmitryvarlamovite with admixtures of columbite-(Fe) and the phase FeNbO 4 ; and ( b ) rossovskyite.
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Reflectance values of <span class="search-highlight">dmitryvarlamovite</span>. Note: Reflectance percentage...

Reflectance values of dmitryvarlamovite. Note: Reflectance percentage...

Published: 01 February 2024
Table 3. Reflectance values of dmitryvarlamovite. Note: Reflectance percentages for the four COM (Commission on Ore Mineralogy) wavelengths are given in bold.
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Sites, fractional atomic coordinates, site occupancies and equivalent isotr...

Sites, fractional atomic coordinates, site occupancies and equivalent isotr...

Published: 01 February 2024
Table 6. Sites, fractional atomic coordinates, site occupancies and equivalent isotropic displacement parameters U eq (in Å 2 ) for dmitryvarlamovite.
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Powder X-ray diffraction data for <span class="search-highlight">dmitryvarlamovite</span>. * Values calcula...

Powder X-ray diffraction data for dmitryvarlamovite. * Values calcula...

Published: 01 February 2024
Table 5. Powder X-ray diffraction data for dmitryvarlamovite. * Values calculated from single-crystal data. The strongest peaks are given in bold.
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Parameters of the Mössbauer spectra of <span class="search-highlight">dmitryvarlamovite</span> with admixed colum...

Parameters of the Mössbauer spectra of dmitryvarlamovite with admixed colum...

Published: 01 February 2024
Table 2. Parameters of the Mössbauer spectra of dmitryvarlamovite with admixed columbite-(Fe) and wolframite-related FeNbO 4 phase obtained at 90 and 295 K.
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Mössbauer spectra of a mixture of <span class="search-highlight">dmitryvarlamovite</span>, a Fe 3+ NbO 4 phase a...

Mössbauer spectra of a mixture of dmitryvarlamovite, a Fe 3+ NbO 4 phase a...

Published: 01 February 2024
Figure 5. Mössbauer spectra of a mixture of dmitryvarlamovite, a Fe 3+ NbO 4 phase and columbite-(Fe) at (a) room (295 K) temperature and (b) 90 K.
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Grains of <span class="search-highlight">dmitryvarlamovite</span>, partly intergrown with columbite-(Fe) and the ...

Grains of dmitryvarlamovite, partly intergrown with columbite-(Fe) and the ...

Published: 01 February 2024
Figure 1. Grains of dmitryvarlamovite, partly intergrown with columbite-(Fe) and the phase FeNbO 4 , extracted from bauxite. Field of view width: 2.5 mm. Photographer M.D. Mil'shina.
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Bond lengths (Å) in the M 1- and M 2-centred octahedra of dmitryvarlamovi...

Bond lengths (Å) in the M 1- and M 2-centred octahedra of dmitryvarlamovi...

Published: 01 February 2024
Figure 7. Bond lengths (Å) in the M 1- and M 2-centred octahedra of dmitryvarlamovite. Thermal ellipsoids are drawn for a 50% probability level. Drawn using the VESTA 3 program (Momma and Izumi, 2008 ).
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Chemical composition of <span class="search-highlight">dmitryvarlamovite</span>. * Total iron corresponding...

Chemical composition of dmitryvarlamovite. * Total iron corresponding...

Published: 01 February 2024
Table 4. Chemical composition of dmitryvarlamovite. * Total iron corresponding to Fe 2 O 3 content of 20.94 wt.% is divided into Fe 2 O 3 and FeO based on the charge balance in the empirical formula. ** For total iron calculated as Fe 2 O 3 . S.D. – standard deviation
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The crystal structure of <span class="search-highlight">dmitryvarlamovite</span> projected along (a) the a axis...

The crystal structure of dmitryvarlamovite projected along (a) the a axis...

Published: 01 February 2024
Figure 6. The crystal structure of dmitryvarlamovite projected along (a) the a axis and (b) the b axis compared with the crystal structure of rossovskyite projected on (c) the (ab) plane and (d) the (bc) plane to show differences in the arrangement of the M 1O 6 and M 2O 6 octahedra
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A list of the IMA-approved, currently questionable and insufficiently studi...

A list of the IMA-approved, currently questionable and insufficiently studi...

Published: 02 May 2024
subsequent to the subcommittee report by Chukanov et al. ( 2023a ): nioboixiolite-(Mn 2+ ) (Chukanov et al ., 2023b ), nioboixiolite-(□) (Li et al. , 2023 ) and dmitryvarlamovite (Udoratina et al ., 2024 ). Insufficiently studied minerals are italicised.
Journal Article

WinClbclas , a Windows program for columbite-supergroup minerals

Fuat Yavuz
Published: 02 May 2024
Mineralogical Magazine (2024) 88 (4): 439–450.
DOI: https://doi.org/10.1180/mgm.2024.35
... subsequent to the subcommittee report by Chukanov et al. ( 2023a ): nioboixiolite-(Mn 2+ ) (Chukanov et al ., 2023b ), nioboixiolite-(□) (Li et al. , 2023 ) and dmitryvarlamovite (Udoratina et al ., 2024 ). Insufficiently studied minerals are italicised. ...
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Selected interatomic distances (Å) in the crystal structure of dmitryvarlam...

Selected interatomic distances (Å) in the crystal structure of dmitryvarlam...

Published: 01 February 2024
Table 7. Selected interatomic distances (Å) in the crystal structure of dmitryvarlamovite. Symmetry codes: (i) 1–x, 1–y, + z ; (ii) 3/2– x , 1/2+ y , 1– z ; (iii) –1/2+ x , 1/2– y , 1– z ; (iv) 1– x , – y , z ; (v) 1/2+ x , 1/2– y , 1– z ; (vi) 1/2– x , –1/2+ y , 1– z ; (vii) + x , –1+ y
Journal Article

Newsletter 76

Ferdinando Bosi, Frédéric Hatert, Marco Pasero, Stuart J. Mills
Published: 01 February 2024
Mineralogical Magazine (2024) 88 (1): 105–109.
DOI: https://doi.org/10.1180/mgm.2023.89
... No. 2022-125a Dmitryvarlamovite Ti 2 (Fe 3+ Nb)O 8 Dmv Verkhne-Shchugorskoe deposit (borehole # 10855, depth 100 m), Middle Timan Mts., Russia (64°24’ N, 51°04’ E) Oksana V. Udoratina, Taras L. Panikirovskii, Nikita V. Chukanov*, Mikhail V. Voronin, Vladimir P. Lutoev, Atali A. Agakhanov...
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Journal Article

New Mineral Names

Travis A. Olds, Christopher Emproto
Published: 01 April 2024
American Mineralogist (2024) 109 (4): 799–802.
DOI: https://doi.org/10.2138/am-2024-NMN10949
... volcano Russia y n Dmitryvarlamovite ** Ti 2 (Fe 3+ Nb)O 8 2022-125a P 2 1 2 1 2 Verkhne-Shchugorskoe deposit Russia y n Yttrotungstite-(Nd) NdW 2 O 7 (OH)·H 2 O 2023-064 P 2 1 / m Nyakabingo mine Rwanda n n Xenotime-(Gd) Gd(PO 4 ) 2023-091 I 4 1 / amd Slovenské...
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