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astrophyllite group

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Journal Article
Published: 30 January 2018
The Canadian Mineralogist (2018) 56 (1): 3–5.
...Elena Sokolova; Fernando CÁmara; Frank C. Hawthorne; Marco E. Ciriotti Abstract Zircophyllite is redefined as an astrophyllite-group mineral, ideally K 2 NaFe 2+ 7 Zr 2 (Si 4 O 12 ) 2 O 2 (OH) 4 F (Fe 2+ -dominant at C 7 ) (IMA 17-D). Zircophyllite was previously considered to be a kupletskite...
Journal Article
Published: 01 April 2010
The Canadian Mineralogist (2010) 48 (2): 431.
... e Georisorse, unità di Pavia, via Ferrata 1, I–27100 Pavia, Italy. E-mail address : [email protected] In the above article [ Can. Mineral . 48 2010, 1–16 ], the four bond-lengths reported in Table 5 for the A (2) site of the Sn-rich astrophyllite and the A (2)–Xi bondlength...
Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 1–16.
... (OH) 4 F, all members of the astrophyllite group, have been refined in space group P 1̅ to R 1 values 5.96, 3.33 and 3.53% for 3576, 3490 and 3791 observed [ F o > 4σ F ] unique reflections measured with Mo K α radiation on a Bruker AXS diffractometer with a CCD SMART APEX detector. The crystal...
FIGURES
Journal Article
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 863–882.
...E. Sokolova Abstract The structure topology and crystal chemistry have been considered for ten astrophyllite-group minerals that contain the HOH layer, a central trioctahedral (O) sheet and two adjacent (H) sheets of [5]- and [6]-coordinated D polyhedra and the astrophyllite (T 4 O 12 ) ribbons...
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Journal Article
Published: 01 February 2012
The Canadian Mineralogist (2012) 50 (1): 159–168.
...Alexander V. Stepanov; Galiya K. Bekenova; Vladimir L. Levin; Elena Sokolova; Frank C. Hawthorne; Elena A. Dobrovol’skaya Abstract Tarbagataite, (K,□) 2 (Ca,Na)(Fe 2+ ,Mn) 7 Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 (OH,F), is a new Ca- and Fe 2+ -dominant astrophyllite-group mineral discovered in a pegmatite...
FIGURES
Journal Article
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2687–2702.
...+ )Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 5 (H 2 O) 4 , is a new astrophyllite-group mineral discovered in a syenite pegmatite at Buer on the Vesterøya peninsula, Sandefjord, Oslo Region, Norway. The mineral occurs in pegmatite cavities as 0.01–0.05 mm thick lamellar (0.2–0.5 × 5–10 mm) crystals forming rosette...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 651–659.
...Yulia A. Uvarova; Elena Sokolova; Frank C. Hawthorne; Atali A. Agakhanov; Leonid A. Pautov Abstract The crystal structure of nalivkinite, ideally Li 2 Na Fe 2+ 7 Ti 2 (Si 8 O 24 ) O 2 (OH) 4 F, a new lithium member of the astrophyllite group, from the moraine of the Dara-i-Pioz glacier, the Alai...
FIGURES
Journal Article
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...
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Journal Article
Published: 01 November 2004
European Journal of Mineralogy (2004) 16 (6): 989–1002.
...Paula C. PIILONEN; Denis G. RANCOURT; R. James EVANS; André E. LALONDE; Andrew M. McDONALD; Amir A.T. SHABANI Abstract A suite of 22 members of the heterophyllosilicate astrophyllite-group from SiO 2 -over-and undersaturated igneous rocks were studied by single-crystal X-ray diffraction, wave...
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Journal Article
Published: 01 February 2003
The Canadian Mineralogist (2003) 41 (1): 1–26.
...Paula C. Piilonen; André E. Lalonde; Andrew M. McDonald; Robert A. Gault; Alf Olav Larsen Abstract The composition of 135 samples of astrophyllite-group minerals from 15 localities has been established by EMPA, ICP–AES, FTIR, TGA, thermal decomposition, NRA and Mössbauer spectroscopy...
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Journal Article
Published: 01 February 2003
The Canadian Mineralogist (2003) 41 (1): 27–54.
...Paula C. Piilonen; Andrew M. McDonald; André E. Lalonde Abstract The crystal chemistry of 20 specimens of astrophyllite-group minerals from seven localities has been studied using a combination of single-crystal X-ray analysis of the structure and electron-microprobe analyses. Members...
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Journal Article
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...
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MÖSSBAUER PARAMETERS FOR <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERALS
Published: 01 February 2010
TABLE 1. MÖSSBAUER PARAMETERS FOR ASTROPHYLLITE-GROUP MINERALS
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MISCELLANEOUS STRUCTURE-REFINEMENT DATA FOR <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERALS
Published: 01 February 2010
TABLE 3. MISCELLANEOUS STRUCTURE-REFINEMENT DATA FOR ASTROPHYLLITE-GROUP MINERALS
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COORDINATES AND DISPLACEMENT FACTORS OF ATOMS IN <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERA...
Published: 01 February 2010
TABLE 4. COORDINATES AND DISPLACEMENT FACTORS OF ATOMS IN ASTROPHYLLITE-GROUP MINERALS
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COORDINATES AND DISPLACEMENT FACTORS OF ATOMS IN <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERA...
Published: 01 February 2010
TABLE 4. COORDINATES AND DISPLACEMENT FACTORS OF ATOMS IN ASTROPHYLLITE-GROUP MINERALS
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SELECTED INTERATOMIC DISTANCE (A) AND ANGLES (°) IN <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MIN...
Published: 01 February 2010
TABLE 5. SELECTED INTERATOMIC DISTANCE (A) AND ANGLES (°) IN ASTROPHYLLITE-GROUP MINERALS
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HYDROGEN BONDING IN <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERALS
Published: 01 February 2010
TABLE 8. HYDROGEN BONDING IN ASTROPHYLLITE-GROUP MINERALS
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BOND-VALENCE* TABLE FOR MONOVALENT ANIONS, OH AND F IN <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> ...
Published: 01 February 2010
TABLE 9. BOND-VALENCE* TABLE FOR MONOVALENT ANIONS, OH AND F IN ASTROPHYLLITE-GROUP MINERALSD iscussion
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IDEAL FORMULAE AND UNIT-CELL PARAMETERS FOR THE <span class="search-highlight">ASTROPHYLLITE</span>-<span class="search-highlight">GROUP</span> MINERAL...
Published: 01 February 2010
TABLE 10. IDEAL FORMULAE AND UNIT-CELL PARAMETERS FOR THE ASTROPHYLLITE-GROUP MINERALS *