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1-20 OF 172 RESULTS FOR
niobokupletskite
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Journal Article
NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 June 2000
The Canadian Mineralogist (2000) 38 (3): 627–639.
...Paula C. Piilonen; André E. Lalonde; Andrew M. McDonald; Robert A. Gault Abstract Niobokupletskite is a new member of the astrophyllite group found in nepheline syenite pegmatites at Mont Saint-Hilaire, Quebec, in association with aegirine, albite, analcime, calcio-ancylite-(Ce), calcite...
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.
..., nalivkinite, tarbagataite, kupletskite, niobokupletskite and kupletskite-(Cs); the type-2 structure occurs in magnesioastrophyllite, sveinbergeite and devitoite. The general formulae for the eight astrophyllite-group minerals (astrophyllite, niobophyllite, nalivkinite, tarbagataite, kupletskite...
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.
... under more oxidizing conditions than those of the astrophyllite subgroup. Incorporation of Nb into the structure and the formation of Nb-bearing kupletskite and niobokupletskite are the result of the substitution M (1) 2+ + M (2,3) 2+ + (Zr,Ti) + F M (1) Na + M (2,3) Fe 3+ + Nb + O. Abstract Nous avons...
Image
Back-scattered electron images of type-I niobokupletskite. A. Nb-rich kuple...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 1. Back-scattered electron images of type-I niobokupletskite. A. Nb-rich kupletskite (Kpt, dark grey) with irregular zonation and a sharp contact with niobokupletskite (Nkpt, light grey). Note the pyrochlore inclusions (white) along fractures in the kupletskite. B. Niobokupletskite (Nkpt
Image
Back-scattered electron images of type-I niobokupletskite. A. Nb-rich kuple...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 1. Back-scattered electron images of type-I niobokupletskite. A. Nb-rich kupletskite (Kpt, dark grey) with irregular zonation and a sharp contact with niobokupletskite (Nkpt, light grey). Note the pyrochlore inclusions (white) along fractures in the kupletskite. B. Niobokupletskite (Nkpt
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...
Image
CHEMICAL COMPOSITIONS OF NIOBOKUPLETSKITE*, MONT SAINT-HILAIRE, QUEBEC
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 2. CHEMICAL COMPOSITIONS OF NIOBOKUPLETSKITE*, MONT SAINT-HILAIRE, QUEBEC
Image
Infrared transmittance spectrum of niobokupletskite.
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 2. Infrared transmittance spectrum of niobokupletskite.
Image
Mössbauer spectrum of Type-II niobokupletskite. The solid line through the...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 3. Mössbauer spectrum of Type-II niobokupletskite. The solid line through the spectral data represents the best fit. The subspectral contributions corresponding to [6] Fe 2+ and [6] Fe 3+ are shown superimposed on the data. The difference between the observed and calculated spectrum
Image
MÖSSBAUER SITE DISTRIBUTION PARAMETERS FOR TYPE-II NIOBOKUPLETSKITE
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 3. MÖSSBAUER SITE DISTRIBUTION PARAMETERS FOR TYPE-II NIOBOKUPLETSKITE
Image
X-RAY POWDER-DIFFRACTION DATA FOR NIOBOKUPLETSKITE
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 4. X-RAY POWDER-DIFFRACTION DATA FOR NIOBOKUPLETSKITE
Image
MISCELLANEOUS DATA: NIOBOKUPLETSKITE
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 5. MISCELLANEOUS DATA: NIOBOKUPLETSKITE
Image
SELECTED INTERATOMIC DISTANCES (Å) FOR NIOBOKUPLETSKITE
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 7. SELECTED INTERATOMIC DISTANCES (Å) FOR NIOBOKUPLETSKITE
Image
EMPIRICAL BOND-VALENCES ( vu ) FOR NIOBOKUPLETSKITE*
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 8. EMPIRICAL BOND-VALENCES ( vu ) FOR NIOBOKUPLETSKITE*
Image
The structure of niobokupletskite showing the HOH structure and interlaye...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 4. The structure of niobokupletskite showing the HOH structure and interlayer cations (K light blue, Na green). The coloring of the polyhedra are as follows: T red, D dark blue, M (1) yellow, M (2) orange, M (4) deep pink. Note that M (3) is not observed in this projection.
Image
The O -sheet of niobokupletskite showing the individual M octahedra. Not...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 5. The O -sheet of niobokupletskite showing the individual M octahedra. Note the continuous zigzag chains of M (2) octahedra (orange) parallel to the X axis ( a ).
Image
The H -sheet of niobokupletskite showing open-branched zweier single cha...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 6. The H -sheet of niobokupletskite showing open-branched zweier single chains of [Si 4 O 12 ] 8− parallel to the X axis ( a ) (red) cross-linked by NbO 6 octahedra (blue).
Image
Content of Nb 5+ versus that of F − in the kupletskite–niobokupletskite ...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 8. Content of Nb 5+ versus that of F − in the kupletskite–niobokupletskite solid-solution series. (Linear fit, R 2 : 0.893).
Image
POSITIONAL AND DISPLACEMENT PARAMETERS AND SITE OCCUPANCIES FOR NIOBOKUPLET...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
TABLE 6. POSITIONAL AND DISPLACEMENT PARAMETERS AND SITE OCCUPANCIES FOR NIOBOKUPLETSKITE
Image
Content of Ti 4+ versus that of Nb 5+ in the kupletskite–niobokupletskit...
in NIOBOKUPLETSKITE, A NEW ASTROPHYLLITE-GROUP MINERAL FROM MONT SAINT-HILAIRE, QUEBEC, CANADA: DESCRIPTION AND CRYSTAL STRUCTURE
> The Canadian Mineralogist
Published: 01 June 2000
F ig . 7. Content of Ti 4+ versus that of Nb 5+ in the kupletskite–niobokupletskite solid-solution series. (Linear fit, R 2 : 0.742).
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