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![SEM investigation of other Sn-bearing minerals in the Bayan Obo deposit. (a) BSE and Sn X-ray scanning mapping of cassiterite accumulating with aggregates of subhedral Sn-rich rutile. (b) Same area in a showing occurrence of cassiterite with rutile (Sn scanning image). (c) Veinlets of rutile crosscutting the aegirine (BSE image). (d) BSE image of Sc-rich titanite in vein-type ore (e) Veinlet of Sn-bearing bafertisite (BSE image). (f) Aggregates of fiber Sn-rich bafertisite (BSE image). Aeg =aegirine; Amp = amphibole; Bao = baotite; Bft = bafertisite; Brt = baryte; Bsn = bastnaesite; Cst = cassiterite; Irt = ilmenorutile; Phl = phlogopite; Qtz = quartz; Rt = rutile; Ttn =titanite.]()
![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), Fe2+ and Mn polyhedra are pale yellow, green and magenta, respectively; Ba, K and Na atoms are shown as large raspberry and green spheres and medium blue spheres; F atoms, (OF) anions and OH groups are shown as small yellow, orange and red spheres, respectively. Captions (b–d): mineral name, space group, structure type where B = Basic structure, BG = Bafertisite Group. Labels TS and I show position of TS and I blocks in a structure, and short black lines show position of cation layers (m = number of layers) in the I block.]()
![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, PO4 tetrahedra are purple, Na and K atoms in the I block are shown as medium blue and large green spheres, (O,F) atoms are shown as small orange spheres .]()
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![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.]()
![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 of topology is necessary, in the text the corresponding HOH layers are labeled (HOH)B (bafertisite type) and (HOH)V (vuonnemite type), respectively. Circles as in Figure 4; the dark-grey tetrahedra in the interlayer represent PO4 groups.]()
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![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).]()
![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 in (c).]()
![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 t2 translation in bafertisite (c) and yoshimuraite (d). Legend as in Figure 2; Ba atoms are shown as magenta circles.]()
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![FTIR spectrum of bafertisite from Kola.]()
![Raman spectrum of bafertisite from Kola.]()
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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 Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 49–63.
...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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Journal Article
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 Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1307–1316.
... (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...
FIGURES
Journal Article
Hejtmanite, a manganese-dominant analogue of bafertisite, a new mineral Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 February 1992
European Journal of Mineralogy (1992) 4 (1): 35–43.
Journal Article
A STRUCTURAL MODEL OF THE LAYER TITANOSILICATE BORNEMANITE BASED ON SEIDOZERITE AND LOMONOSOVITE MODULES Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 2001
The Canadian Mineralogist (2001) 39 (6): 1665–1673.
...) 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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SEM investigation of other Sn-bearing minerals in the Bayan Obo deposit. ( ... Available to Purchase
in Cassiterite and Sn mineralization in the giant Bayan Obo Fe-Nb-REE deposit, Northern China
> American Mineralogist
Published: 01 January 2025
) Veinlets of rutile crosscutting the aegirine (BSE image). ( d ) BSE image of Sc-rich titanite in vein-type ore ( e ) Veinlet of Sn-bearing bafertisite (BSE image). ( f ) Aggregates of fiber Sn-rich bafertisite (BSE image). Aeg =aegirine; Amp = amphibole; Bao = baotite; Bft = bafertisite; Brt = baryte; Bsn
Image
Bafertisite group: linkage 2 of H and O sheets in bafertisite ( a ), the ba... Available to Purchase
in The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1 T to innelite-1 A
> Mineralogical Magazine
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
Image
Group II: crystal structures of (a) bobshannonite and (b) bafertisite and d... Available to Purchase
in From Structure Topology To Chemical Composition. Xxi. Understanding the Crystal Chemistry of Barium in Ts-block Minerals
> The Canadian Mineralogist
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. 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 Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 14 June 2021
The Canadian Mineralogist (2021) 59 (2): 365–379.
...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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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 Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 16 January 2020
The Canadian Mineralogist (2020) 58 (1): 19–43.
...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...
FIGURES
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The derivative (D) structure of cámaraite (bafertisite group) ( a ) can be ... Available to Purchase
in The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1 T to innelite-1 A
> Mineralogical Magazine
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 .
Image
![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 of topology is necessary, in the text the corresponding HOH layers are labeled (HOH)B (bafertisite type) and (HOH)V (vuonnemite type), respectively. Circles as in Figure 4; the dark-grey tetrahedra in the interlayer represent PO4 groups.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/rimg/57/1/10.2138_rmg.2005.57.3/3/s_0069f06.jpeg?Expires=2147483647&Signature=KKjKDzO6ncSh8Mr2J4haKWakMcBQ5JWmMJSS75GIIQTwFX9AW9txKzHGInFH3UTxWWg48u-7V9rCOT9MnhCPte38WWiHwaJLhzbMWNRFO14F-1fSNHE~5OwwffzxgtcxWYGtcDUA9C~sv9QJj~fTGUsu9bDlt9x0xukucDdAlSZ0mCnxGT771VGW0shebjrjH8oIduXBx1w5c-9HP1P27qB2OvNmbbx6ZxzoSrhLJLiRYU~QeF89ElLl4NMrTHaTbq9ANQR8HGMFA3mcC4wl8O5hDXK7U9UAnAIPYNLkTG7tUj8V7Hp1D82aclm737qac1P--WWAX3BFQcQD~gCalQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
View along [100] of the crystal structure of bafertisite (a), vuonnemite (b... Available to Purchase
in Polysomatic Aspects of Microporous Minerals – Heterophyllosilicates, Palysepioles and Rhodesite-Related Structures
> Reviews in Mineralogy and Geochemistry
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+ Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 June 2000
The Canadian Mineralogist (2000) 38 (3): 649–656.
... 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...
FIGURES
Image
![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).](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/canmin/54/1/10.3749_canmin.1500059/1/s_i1499-1276-54-1-49-f01.png?Expires=2147483647&Signature=JITmHZZQ4ekpWQuqBEX6raV5SJWHtKo7acZTKp2q~ECXRhd7r~p6OH~sdsB5s2~a5yn4yaXl-jt7dE88IgLYb14Flsx-jZbDKSvS9T2omN0FgG5OHkxNDijtEK2aFPuxPvG3vcVOXpmnBTEAa8uhS-NUFO3RaqX8hiwbD6TcM7Z8RWA3pF2pB8X7pCMkxLTSi6BY-zbMWQVzQN9XZK7IgMrltDKe4zz86kEKWgsmM3kN8yAu4dXkV7UdhJe53JjQnz9iDP2M7JVr9z4jOdaGJnPTKbDYfPOerJ~RD~0YXqEF5tPHt2RkzVObHOqZ2yiJ8jmxk5HKyZsXQATTZUlJZw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
High-resolution TEM image of cámaraite (Cam) slices in a bafertisite (Baf) ... Available to Purchase
in 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
> The Canadian Mineralogist
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 ).
Image
TOT layer of a phyllosilicate (a) as transformed, by periodic substitution... Available to Purchase
in Polysomatic Aspects of Microporous Minerals – Heterophyllosilicates, Palysepioles and Rhodesite-Related Structures
> Reviews in Mineralogy and Geochemistry
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
Image
Group II. Chemical composition and stereochemistry of the H sheet and P s... Available to Purchase
in FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. I. STRUCTURAL HIERARCHY AND STEREOCHEMISTRY IN TITANIUM DISILICATE MINERALS
> The Canadian Mineralogist
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
Cassiterite and Sn mineralization in the giant Bayan Obo Fe-Nb-REE deposit, Northern China Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2025
American Mineralogist (2025) 110 (1): 101–113.
... ) Veinlets of rutile crosscutting the aegirine (BSE image). ( d ) BSE image of Sc-rich titanite in vein-type ore ( e ) Veinlet of Sn-bearing bafertisite (BSE image). ( f ) Aggregates of fiber Sn-rich bafertisite (BSE image). Aeg =aegirine; Amp = amphibole; Bao = baotite; Bft = bafertisite; Brt = baryte; Bsn...
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Includes: Supplemental Content
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MISCELLANEOUS REFINEMENT DATA FOR BAFERTISITE Available to Purchase
in 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
> The Canadian Mineralogist
Published: 01 January 2016
TABLE 3. MISCELLANEOUS REFINEMENT DATA FOR BAFERTISITE
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FTIR spectrum of bafertisite from Kola. Available to Purchase
in 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
> The Canadian Mineralogist
Published: 01 January 2016
Fig. 3. FTIR spectrum of bafertisite from Kola.
Image
Raman spectrum of bafertisite from Kola. Available to Purchase
in 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
> The Canadian Mineralogist
Published: 01 January 2016
Fig. 4. Raman spectrum of bafertisite from Kola.
Image
CHEMICAL ANALYSIS AND FORMULA UNIT FOR BAFERTISITE Available to Purchase
in 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
> The Canadian Mineralogist
Published: 01 January 2016
TABLE 2. CHEMICAL ANALYSIS AND FORMULA UNIT FOR BAFERTISITE
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