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bafertisite

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Journal Article

From Structure Topology To Chemical Composition. Xix. Titanium Silicates: Revision of the Crystal Structure and Chemical Formula of Bafertisite, Ba 2 Fe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F 2 , a Group-ii Ts-block Mineral

Fernando CÁmara, Elena Sokolova, Yassir A. Abdu, Leonid A. Pautov
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 49–63.
DOI: https://doi.org/10.3749/canmin.1500059
...Fernando CÁmara; Elena Sokolova; Yassir A. Abdu; Leonid A. Pautov Abstract The crystal structure and chemical formula of bafertisite, Ba 2 Fe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F 2 , have been revised. Three samples of bafertisite were studied using electron-microprobe analysis, Mössbauer...
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THE CRYSTAL STRUCTURE OF DELINDEITE, Ba 2 {(Na,K,□) 3 (Ti,Fe)[Ti 2 (O,OH) 4 Si 4 O 14 ](H 2 O,OH) 2 }, A MEMBER OF THE MERO-PLESIOTYPE BAFERTISITE SERIES

Giovanni Ferraris, Gabriella Ivaldi, Dmitry Yu. Pushcharovsky, Natalia V. Zubkova, Igor V. Pekov
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1307–1316.
DOI: https://doi.org/10.2113/gscanmin.39.5.1307
... (Ti,Fe)[Ti 2 (O,OH) 4 Si 4 O 14 ](H 2 O,OH) 2 }, space group A 2/ m , a 5.327(2), b 6.856(2), c 21.51(3) Å, β 93.80(4)°, Z = 2, D calc. = 3.815 g/cm 3 , belongs to a large group of bafertisite-like structures characterized by an ideally octahedral ( O ) sheet sandwiched between two heteropolyhedral...
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Hejtmanite, a manganese-dominant analogue of bafertisite, a new mineral

Stanislav Vrana, Milan Rieder, Mickey Gunter
Published: 01 February 1992
European Journal of Mineralogy (1992) 4 (1): 35–43.
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A STRUCTURAL MODEL OF THE LAYER TITANOSILICATE BORNEMANITE BASED ON SEIDOZERITE AND LOMONOSOVITE MODULES

Giovanni Ferraris, Elena Belluso, Angela Gula, Svetlana V. Soboleva, Olga A. Ageeva, Boris E. Borutskii
Published: 01 December 2001
The Canadian Mineralogist (2001) 39 (6): 1665–1673.
DOI: https://doi.org/10.2113/gscanmin.39.6.1665
...) 2 O 2 Si 4 O 14 ] (F,OH) 2 }PO 4 , is monoclinic I 11 b , a 5.498(4), b 7.120(6), c 47.95(4) Å, γ 88.4(1)°; Z = 4. By comparison with structural and chemical data for titanosilicates based on a bafertisite-like layer (heterophyllosilicates), a model of the structure of bornemanite has been obtained...
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<span class="search-highlight">Bafertisite</span> group: linkage 2 of H and O sheets in <span class="search-highlight">bafertisite</span> ( a ), the ba...

Bafertisite group: linkage 2 of H and O sheets in bafertisite ( a ), the ba...

Published: 01 December 2017
Fig. 4. Bafertisite group: linkage 2 of H and O sheets in bafertisite ( a ), the basic crystal structures of bobshannonite ( b ), bafertisite ( c ) and yoshimuraite ( d ). Legend as in Fig. 2 ; Ti (+ Nb), Fe 2+ and Mn polyhedra are pale yellow, green and magenta, respectively; Ba, K and Na
Journal Article

From Structure Topology to Chemical Composition. XXIX. Revision of the Crystal Structure of Perraultite, NaBaMn 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2 F, a Seidozerite-Supergroup TS-Block Mineral from the Oktyabr'skii Massif, Ukraine, and Discreditation of Surkhobite

Elena Sokolova, Maxwell C. Day, Frank C. Hawthorne, Atali A. Agakhanov, Fernando Cámara, Yulia A. Uvarova, Giancarlo Della Ventura
Published: 14 June 2021
The Canadian Mineralogist (2021) 59 (2): 365–379.
DOI: https://doi.org/10.3749/canmin.2000066
...Elena Sokolova; Maxwell C. Day; Frank C. Hawthorne; Atali A. Agakhanov; Fernando Cámara; Yulia A. Uvarova; Giancarlo Della Ventura ABSTRACT The crystal structure of perraultite from the Oktyabr'skii massif, Donetsk region, Ukraine (bafertisite group, seidozerite supergroup), ideally NaBaMn 4 Ti 2...
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Group II: crystal structures of (a) bobshannonite and (b) <span class="search-highlight">bafertisite</span> and d...

Group II: crystal structures of (a) bobshannonite and (b) bafertisite and d...

Published: 01 January 2016
Fig. 5. Group II: crystal structures of (a) bobshannonite and (b) bafertisite and details of the structures: H sheet in (c) bobshannonite and (d) bafertisite and a close-packed layer of (e) Ba, K, and Na atoms in bobshannonite and (f) Ba atoms in bafertisite. Legend as in Figure 4 , PO 4
Journal Article

From structure topology to chemical composition. XXVII. Revision of the crystal chemistry of the perraultite-type minerals of the seidozerite supergroup: Jinshajiangite, surkhobite, and bobshannonite

Elena Sokolova, Frank C. Hawthorne, Fernando Cámara, Giancarlo Della Ventura, Yulia A. Uvarova
Published: 16 January 2020
The Canadian Mineralogist (2020) 58 (1): 19–43.
DOI: https://doi.org/10.3749/canmin.1900070
...Elena Sokolova; Frank C. Hawthorne; Fernando Cámara; Giancarlo Della Ventura; Yulia A. Uvarova ABSTRACT The crystal structures of the three perraultite-type minerals (bafertisite group, seidozerite supergroup)—jinshajiangite from Norra Kärr, Sweden, ideally NaBaFe 2+ 4 Ti 2 (Si 2 O 7 ) 2 O 2 (OH) 2...
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The derivative (D) structure of cámaraite (<span class="search-highlight">bafertisite</span> group) ( a ) can be ...

The derivative (D) structure of cámaraite (bafertisite group) ( a ) can be ...

Published: 01 December 2017
Fig. 7. The derivative (D) structure of cámaraite (bafertisite group) ( a ) can be built of the fragments of the basic (B) structures of the minerals of the same group: bafertisite ( b ) and jinshajiangite ( c ). Legend as in Fig. 4 .
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View along [100] of the crystal structure of <span class="search-highlight">bafertisite</span> (a), vuonnemite (b...

View along [100] of the crystal structure of bafertisite (a), vuonnemite (b...

Published: 01 January 2005
Figure 6. View along [100] of the crystal structure of bafertisite (a), vuonnemite (b) and surkhobite (c). Whereas in bafertisite and surkhobite the two H sheets of a HOH layer have a relative shift along [010], in vuonnemite this shift is absent. When a discrimination between the two types
Journal Article

THE CRYSTAL STRUCTURE OF YOSHIMURAITE, A LAYERED Ba–Mn–Ti SILICOPHOSPHATE, WITH COMMENTS ON FIVE-COORDINATED Ti 4+

Andrew M. McDonald, Joel D. Grice, George Y. Chao
Published: 01 June 2000
The Canadian Mineralogist (2000) 38 (3): 649–656.
DOI: https://doi.org/10.2113/gscanmin.38.3.649
... relatively weak and resulting in the pronounced {001} cleavage observed in the mineral. Yoshimuraite is a member of the BM n heterophyllosilicate polysomatic series [specifically, the BM 0 poly-some series], which includes phases such as astrophyllite, bafertisite and seidozerite. Abstract Nous avons résolu...
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High-resolution TEM image of cámaraite (Cam) slices in a <span class="search-highlight">bafertisite</span> (Baf) ...

High-resolution TEM image of cámaraite (Cam) slices in a bafertisite (Baf) ...

Published: 01 January 2016
Fig. 1. High-resolution TEM image of cámaraite (Cam) slices in a bafertisite (Baf) matrix. The zone axis is [1 ¯ 10]. The upper right inset shows an SAED (selected area electron diffraction) image of bafertisite (after Cámara et al . 2009 ).
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TOT layer of a phyllosilicate (a) as transformed, by periodic substitution...

TOT layer of a phyllosilicate (a) as transformed, by periodic substitution...

Published: 01 January 2005
Figure 3. TOT layer of a phyllosilicate (a) as transformed, by periodic substitution of rows of octahedra (dark grey) for tetrahedra, to HOH heterophyllosilicate layers typical of bafertisite (b), astrophyllite (c) and nafertisite (d). B bafertisite-type and M mica-type modules are shown
Journal Article

Cassiterite and Sn mineralization in the giant Bayan Obo Fe-Nb-REE deposit, North China

Ya-Ting Xu, Ru-Cheng Wang, Mei-Fu Zhou, Fu-Yuan Wu
Published: 06 May 2024
American Mineralogist (2024)
DOI: https://doi.org/10.2138/am-2023-9149
..., and ubiquitous late-stage granular cassiterite, Sn-rich rutile, titanite, and bafertisite are present in vein-type REE-Fe ores. Multiple U-Th-Pb dating of monazite and columbite-Mn in association with cassiterite yields peak ages of 425 Ma and 419±18 Ma, respectively, revealing coeval Sn and Nb mineralization...
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Group II. Chemical composition and stereochemistry of the H sheet and P s...

Group II. Chemical composition and stereochemistry of the H sheet and P s...

Published: 01 December 2006
F ig . 11. Group II. Chemical composition and stereochemistry of the H sheet and P sites. The H sheet is viewed perpendicular to the plane of the TS block in: (a) bafertisite and (b) yoshimuraite, and viewed along the t 2 translation in bafertisite (c) and yoshimuraite (d). Legend
Journal Article

The Ericssonite Group of Fe 3+ Disilicate Minerals

Elena Sokolova, Frank C. Hawthorne, Fernando CÁmara, Malcolm E. Back
Published: 30 January 2018
The Canadian Mineralogist (2018) 56 (1): 95–99.
DOI: https://doi.org/10.3749/canmin.1700064
...). Ericssonite has two polytypes, of monoclinic symmetry and orthorhombic symmetry. The crystal chemistry of the ericssonite-group minerals and bafertisite- and lamprophyllite-group minerals (seidozerite supergroup) is compared. Ericssonite and ferroericssonite do not contain the combination of features...
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IDEAL STRUCTURAL FORMULAE AND MISSELANEOUS INFORMATION FOR THE <span class="search-highlight">BAFERTISITE</span>-...

IDEAL STRUCTURAL FORMULAE AND MISSELANEOUS INFORMATION FOR THE BAFERTISITE-...

Published: 30 January 2018
TABLE 3. IDEAL STRUCTURAL FORMULAE AND MISSELANEOUS INFORMATION FOR THE BAFERTISITE- AND LAMPROPHYLLIE-GROUP MINERALS WITH BASIC STRUCTURES, AFTER SOKOLOVA & CÁMARA (2017)*
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High-resolution TEM image of cámaraite (Cam) slices in a <span class="search-highlight">bafertisite</span> (Baf)...

High-resolution TEM image of cámaraite (Cam) slices in a bafertisite (Baf)...

Published: 01 October 2009
F ig . 3. High-resolution TEM image of cámaraite (Cam) slices in a bafertisite (Baf) matrix. The zone axis is [ \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\bar{1}}\) \end
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Ideal structural formulae of the <span class="search-highlight">bafertisite</span>-group minerals*, Ti (+ Nb) = 2...

Ideal structural formulae of the bafertisite-group minerals*, Ti (+ Nb) = 2...

Published: 01 December 2017
Table 3. Ideal structural formulae of the bafertisite-group minerals*, Ti (+ Nb) = 2 apfu per (Si 2 O 7 ) 2 Mineral Ideal structural formula Z I block TS block I block TS block (Si 2 O 7 ) 2 ( ) 2 ( ) 2 ( ) 0–2
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Ideal structural formulae of the <span class="search-highlight">bafertisite</span>-group minerals*, Ti (+ Nb) = 2...

Ideal structural formulae of the bafertisite-group minerals*, Ti (+ Nb) = 2...

Published: 01 December 2017
Table 3. Ideal structural formulae of the bafertisite-group minerals*, Ti (+ Nb) = 2 apfu per (Si 2 O 7 ) 2 Mineral Ideal structural formula Z I block TS block I block TS block (Si 2 O 7 ) 2 ( ) 2 ( ) 2 ( ) 0–2