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![Back-scattered electron image of a grain in sample 1b, showing <span class="search-highlight">niobophyllit</span>...]()
![Test of the coupled substitution Na B + (Nb, Ta) ⇌Ca + (Ti, Zr) in astro...]()
![Room-temperature Mossbauer spectra and profiles of Voigt-based quadrupole-s...]()
![Diagram depicting members of the astrophyllite group on the basis of the pr...]()
![Compositional variation in Nb-rich members of the astrophyllite group. Data...]()
![SiO 2 (wt.%) and Ca (a.p.f.u.) plotted against cation deficits in the ( A ...]()
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![Content of Nb versus that of F in astrophyllite-group minerals. Substitut...]()
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![Ti-Nb-Zr relationships in selected Fe-dominant members of the astrophyllite...]()
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![General view of the crystal structure of kupletskite-(Cs) (a) and arrangeme...]()
1-20 OF 173 RESULTS FOR
niobophyllite
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Journal Article
THE CRYSTAL STRUCTURES OF NIOBOPHYLLITE, KUPLETSKITE-(Cs) AND Sn-RICH ASTROPHYLLITE: REVISIONS TO THE CRYSTAL CHEMISTRY OF THE ASTROPHYLLITE-GROUP MINERALS: ERRATUM
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2010
The Canadian Mineralogist (2010) 48 (2): 431.
Journal Article
THE CRYSTAL STRUCTURES OF NIOBOPHYLLITE, KUPLETSKITE-(Cs) AND Sn-RICH ASTROPHYLLITE: REVISIONS TO THE CRYSTAL CHEMISTRY OF THE ASTROPHYLLITE-GROUP MINERALS
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 1–16.
...Fernando Cámara; Elena Sokolova; Yassir Abdu; Frank C. Hawthorne Abstract The crystal structures of niobophyllite, K 2 Na Fe 2+ 7 (NbTi) (Si 4 O 12 ) 2 O 2 (OH) 4 O, kupletskite-(Cs), Cs 2 Na Mn 7 Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F, and Sn-rich astrophyllite, K 2 Na Fe 2+ 7 Ti 2 (Si 4 O 12 ) 2 O 2...
FIGURES
Journal Article
Niobophyllite; the niobium analogue of astrophyllite, a new mineral from Seal Lake, Labrador
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 1964
The Canadian Mineralogist (1964) 8 (1): 40–52.
Journal Article
Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
Journal: Mineralogical Magazine
Published: 01 February 2007
Mineralogical Magazine (2007) 71 (1): 1–16.
...R. Macdonald; S. Karup-Møller; J. Rose-Hansen Abstract Electron microprobe analyses are presented for astrophyllite-group minerals from hydrothermal veins and pegmatites of the Ilímaussaq complex, South Greenland. The analyses fall mainly into two groups: (1) niobophyllites with the highest Nb/(Nb...
FIGURES
| View All (8)
Journal Article
Veblenite, K 2 □ 2 Na( Fe 5 2 + Fe 4 3 + Mn 7 2 + □)Nb 3 Ti(Si 2 O 7 ) 2 (Si 8 O 22 ) 2 O 6 (OH) 10 (H 2 O) 3, a new mineral from Seal Lake, Newfoundland and Labrador: mineral description, crystal structure, and a new veblenite Si 8 O 22 ribbon
Journal: Mineralogical Magazine
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 2955–2974.
..., Seal Lake area, Newfoundland and Labrador (Canada), in a band of paragneiss consisting chiefly of albite and arfvedsonite. Veblenite occurs as red brown single laths and fibres included in feldspar. Associated minerals are niobophyllite, albite, arfvedsonite, aegirine-augite, barylite, eudidymite...
FIGURES
| View All (6)
Journal Article
Further developments in the structure topology of the astrophyllite-group minerals
Journal: Mineralogical Magazine
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 863–882.
.... In the astrophyllite group, there are two types of structures based on the type of linkage of HOH layers: (1) HOH layers link directly where they share common vertices of D octahedra, and (2) HOH layers do not link directly via polyhedra of the H sheets. The type-1 structure occurs in astrophyllite, niobophyllite...
FIGURES
| View All (7)
Journal Article
The astrophyllite supergroup: nomenclature and classification
Journal: Mineralogical Magazine
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 143–153.
..., niobophyllite, zircophyllite, tarbagataite, nalivkinite and bulgakite. In the kupletskite group (HOH blocks connect via D– –D bridges, Mn 2+ is dominant at C 7 ), there are three minerals: kupletskite, niobokupletskite and kupletskite-(Cs). In the devitoite group (HOH blocks do not connect via D– –D bridges...
FIGURES
| View All (7)
Image
Back-scattered electron image of a grain in sample 1b, showing niobophyllit...
in Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
> Mineralogical Magazine
Published: 01 February 2007
F ig . 2. Back-scattered electron image of a grain in sample 1b, showing niobophyllite (lighter areas) and astrophyllite (darker areas).
Image
Test of the coupled substitution Na B + (Nb, Ta) ⇌Ca + (Ti, Zr) in astro...
in Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
> Mineralogical Magazine
Published: 01 February 2007
F ig . 6. Test of the coupled substitution Na B + (Nb, Ta) ⇌Ca + (Ti, Zr) in astrophyllite and niobophyllite from the Ilímaussaq intrusion. Data from Table 2 , this paper.
Image
Room-temperature Mossbauer spectra and profiles of Voigt-based quadrupole-s...
in THE CRYSTAL STRUCTURES OF NIOBOPHYLLITE, KUPLETSKITE-(Cs) AND Sn-RICH ASTROPHYLLITE: REVISIONS TO THE CRYSTAL CHEMISTRY OF THE ASTROPHYLLITE-GROUP MINERALS
> The Canadian Mineralogist
Published: 01 February 2010
F ig . 1. Room-temperature Mossbauer spectra and profiles of Voigt-based quadrupole-splitting distributions (QSD) for Fe 2+ in (a) niobophyllite, (b) kupletskite-(Cs), and (c) Sn-rich astrophyllite.
Image
Diagram depicting members of the astrophyllite group on the basis of the pr...
in INSIGHTS INTO ASTROPHYLLITE-GROUP MINERALS. I. NOMENCLATURE, COMPOSITION AND DEVELOPMENT OF A STANDARDIZED GENERAL FORMULA
> The Canadian Mineralogist
Published: 01 February 2003
F ig . 5c. Diagram depicting members of the astrophyllite group on the basis of the predominant cation at D. Kpt: kupletskite, Zrt: zircophyllite, Nbkpt: niobokupletskite, Fe–Zrt: Fe-dominant analogue of zircophyllite, Nbt: niobophyllite, Ast: astrophyllite.
Image
Compositional variation in Nb-rich members of the astrophyllite group. Data...
in Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
> Mineralogical Magazine
Published: 01 February 2007
F ig . 7. Compositional variation in Nb-rich members of the astrophyllite group. Data used are the new average Ilímaussaq analyses (this paper, Table 2 , only analyses with F), the type niobophyllite ( Nickel et al. , 1964 ; Piilonen et al. , 2003 ), and the type niobokupletskite ( Piilonen
Image
SiO 2 (wt.%) and Ca (a.p.f.u.) plotted against cation deficits in the ( A ...
in Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
> Mineralogical Magazine
Published: 01 February 2007
because niobophyllites have cation deficits in the A site almost certainly not related to hydration.
Journal Article
TARBAGATAITE, (K,□) 2 (Ca,Na)(Fe 2+ ,Mn) 7 Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 (OH,F), A NEW ASTROPHYLLITE-GROUP MINERAL SPECIES FROM THE VERKHNEE ESPE DEPOSIT, AKJAILYAUTAS MOUNTAINS, KAZAKHSTAN: DESCRIPTION AND CRYSTAL STRUCTURE
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2012
The Canadian Mineralogist (2012) 50 (1): 159–168.
.... Tarbagataite was discovered during a systematic analytical study of astrophyllite. Tarbagataite is isostructural with astrophyllite, ideally K 2 NaFe 2+ 7 Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F ( Piilonen et al . 2003b ); niobophyllite, ideally K 2 NaFe 2+ 7 (Nb,Ti) 2 (Si 4 O 12 ) 2 O 2 (OH) 4 (O,OH...
FIGURES
Image
Content of Nb versus that of F in astrophyllite-group minerals. Substitut...
in INSIGHTS INTO ASTROPHYLLITE-GROUP MINERALS. I. NOMENCLATURE, COMPOSITION AND DEVELOPMENT OF A STANDARDIZED GENERAL FORMULA
> The Canadian Mineralogist
Published: 01 February 2003
F ig . 15. Content of Nb versus that of F in astrophyllite-group minerals. Substitution of Nb into the structure occurs in niobokupletskite, niobophyllite and Nb-bearing kupletskite as the result of the substitution Ti + F = Nb + O. Samples of the astrophyllite subgroup and those from
Journal Article
INSIGHTS INTO ASTROPHYLLITE-GROUP MINERALS. I. NOMENCLATURE, COMPOSITION AND DEVELOPMENT OF A STANDARDIZED GENERAL FORMULA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2003
The Canadian Mineralogist (2003) 41 (1): 1–26.
...F ig . 5c. Diagram depicting members of the astrophyllite group on the basis of the predominant cation at D. Kpt: kupletskite, Zrt: zircophyllite, Nbkpt: niobokupletskite, Fe–Zrt: Fe-dominant analogue of zircophyllite, Nbt: niobophyllite, Ast: astrophyllite. ...
FIGURES
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Image
Ti-Nb-Zr relationships in selected Fe-dominant members of the astrophyllite...
in Astrophyllite-group minerals from the Ilímaussaq complex, South Greenland (contribution to the mineralogy of Ilímaussaq no. 123)
> Mineralogical Magazine
Published: 01 February 2007
. The dashed line encloses the field of astrophyllites presented by Piilonen et al. (2003 ; their fig. 5c). Data sources: Ilímaussaq – this paper; type niobophyllite – Nickel et al. (1964) and Piilonen et al. (2003) ; Zr-poor astrophyllites – Strange Lake, Canada – Birkett et al. (1996) , El Paso
Journal Article
The Crystal Structure of Zircophyllite, K 2 NaFe 2+ 7 Zr 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F, an Astrophyllite-supergroup Mineral from Mont Saint-hilaire, QuÉbec, Canada
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1539–1547.
... of niobophyllite, kupletskite-(Cs) and Sn-rich astrophyllite; revisions to the crystal chemistry of the astrophyllite-group minerals .
Canadian Mineralogist
48 ,
1 – 16 .
Kampf,
A.R.,
Rossman,
G.R...
FIGURES
Journal Article
New Mineral Names,
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 487–492.
... veblenite (IMA 2010-050), ideally K 2 □ 2 Na(Fe 5 2+ Fe 4 3+ Mn 7 2+ □)Nb 3 Ti(Si 2 O 7 ) 2 (Si 8 O 22 ) 2 O 6 (OH) 10 (H 2 O) 3 was discovered in the holotype specimen of niobophyllite #M26148 (Royal Ontario Museum, Toronto, Canada) originated from Ten Mile Lake, Seal Lake area, Newfoundland...
Image
General view of the crystal structure of kupletskite-(Cs) (a) and arrangeme...
in THE CRYSTAL STRUCTURES OF NIOBOPHYLLITE, KUPLETSKITE-(Cs) AND Sn-RICH ASTROPHYLLITE: REVISIONS TO THE CRYSTAL CHEMISTRY OF THE ASTROPHYLLITE-GROUP MINERALS
> The Canadian Mineralogist
Published: 01 February 2010
F ig . 2. General view of the crystal structure of kupletskite-(Cs) (a) and arrangement of interstitial cations in the niobophyllite (b), kupletskite-(Cs) (c) and Sn-rich astrophyllite (d) structure viewed down [001]. In (a), (SiO 4 ) tetrahedra are orange, Mn-dominant M(1,3) and Fe 2+ -dominant
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