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cuspidine

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Journal Article
Published: 01 August 2010
The Canadian Mineralogist (2010) 48 (4): 809–819.
...Brent E. Owens; Daniel T. Kremser Abstract We report here an occurrence of cuspidine as part of a complex symplectitic intergrowth formed from the breakdown of åkermanite ( X Mg = 0.97, Na-mel 12 Gh 3 ) in a calc-silicate xenolith in the Kiglapait Intrusion, Labrador, Canada. The symplectite...
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Journal Article
Published: 01 October 2009
The Canadian Mineralogist (2009) 47 (5): 1275–1279.
...Stefano Merlino; Marcello Mellini § E-mail address : merlino@dst.unipi.it 23 01 2009 © 2009 Mineralogical Association of Canada 2009 In their paper entitled “Marianoite, a new member of the cuspidine group from the Prairie Lake silicocarbonatite, Ontario...
FIGURES
Journal Article
Published: 01 October 2009
The Canadian Mineralogist (2009) 47 (5): 1275–1282.
... variations in the M 1 and M 2 polyhedra do Mellini & Merlino (1979 , p. 119–121) actually refer to other cuspidine-group minerals ( Merlino & Mellini 2009 , p. 1277). Hence, it seems entirely appropriate that Chakhmouradian et al. (2008) used the same example ( i.e. , NaNbO 3 ) to illustrate...
Journal Article
Published: 01 December 2008
Mineralogical Magazine (2008) 72 (6): 1261–1277.
... in a groundmass of cuspidine, sodalite, ferroan manganoan monticellite, K-Fe sulphide and manganoan titanian magnetite and gregoryite. The xenocrysts were not in equilibrium with the melt which formed their current host, as clinopyroxenes and Ti-andradite are mantled by cuspidine, and nepheline by sodalite...
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Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 1023–1032.
...Anton R. Chakhmouradian; Roger H. Mitchell; Peter C. Burns; Yulia Mikhailova; Ekaterina P. Reguir Abstract Marianoite, a new member of the cuspidine group of minerals, occurs in phlogopite–calcite silicocarbonatite in the western part of the Mesoproterozoic Prairie Lake intrusive complex...
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Journal Article
Published: 01 October 2004
Mineralogical Magazine (2004) 68 (5): 787–799.
... in gregoryite and fractures in nyerereite-gregoryite intergrowths. Silicates include members of the sodian cuspidine–niobian cuspidine–niocalite solid-solution series and manganoan monticellite. Oxides are represented by members of the magnesioferrite–jacobsite–magnetite solid-solution series. Sulphides...
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Journal Article
Published: 01 December 2000
South African Journal of Geology (2000) 103 (3-4): 249–254.
...Ian S. Buick; Roger Gibson; Thomas Wallmach; Jorg Metz Abstract The rare calc-silicate minerals cuspidine, foshagite and hillebrandite occur as late phases in calcsilicate xenoliths from the Rustenburg Layered Suite of the Bushveld Complex. These minerals occur in narrow veins or as replacements...
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Journal Article
Published: 01 October 2000
American Mineralogist (2000) 85 (10): 1534–1539.
... 1 / n , a = 10.8730(21) Å, b = 10.5516(25) Å, c = 7.4287(13) Å, and β = 109.74(2)° and twinned by pseudo-merohedry with m (100) as the plane of twinning which was accounted for in the refinement calculations. The crystal belongs to the structure family of the mineral cuspidine and represents...
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Journal Article
Published: 01 August 1995
The Canadian Mineralogist (1995) 33 (4): 879–884.
Journal Article
Published: 01 December 1988
The Canadian Mineralogist (1988) 26 (4): 933–943.
Journal Article
Published: 01 June 1961
American Mineralogist (1961) 46 (5-6): 759–761.
...A. Wilson; J. K. Leary Abstract Cuspidine(3CaO·CaF 2 ·2SiO 2 )is a rare natural mineral which was first describedby Scacchi. 1 Since that time the mineral has been synthesized by solid state reaction, 2 from melts 3 and hydrothermally. 4 It has also been observed as a constituent of electric...
Journal Article
Published: 01 December 1958
American Mineralogist (1958) 43 (11-12): 1195–1202.
...A. Van Valkenburg; G. F. Rynders Abstract Cuspidine (3CaO · 2SiO 2 · CaF 2 ) can be synthesized hydrothermally, from crystallizing melts, and by solid state reactions. Efforts to substitute hydroxyl for fluoride ions in the cuspidine structure were not successful, and this suggested that custerite...
Image
BSE images of niocalite–<span class="search-highlight">cuspidine</span> solid solutions. ( a ) Subhedral core of ...
Published: 01 October 2004
F ig . 5. BSE images of niocalite–cuspidine solid solutions. ( a ) Subhedral core of niocalite (light grey) mantled by niobian cuspidine (dark grey) containing inclusions of highly-corroded alabandite (white) and euhedral manganoan magnetite (white). ( b ) Sector-zoned crystal of sodian
Image
A: Contact of xenolith with volcanic rock (polished block): 1–volcanic rock...
Published: 01 January 2015
Fig. 1 A: Contact of xenolith with volcanic rock (polished block): 1–volcanic rock, 2–altered xenolith, 3–rusinovite–cuspidine vein. B: Backscattered electron image showing a fragment of rusinovite–cuspidine vein with eltyubyuite. (online version in colour) Abbreviations: Rus = rusinovite, Cus
Image
(A) Low-temperature calcite–qatranaite–thaumasite veins in fine-grained cus...
Published: 01 May 2019
Fig. 3 (A) Low-temperature calcite–qatranaite–thaumasite veins in fine-grained cuspidine zone with abundant small sphalerite grains. Fragment magnified in Fig. 3B is shown in frame. (B) Qatranaite poikilocrystal with calcite, afwillite and thaumasite inclusions. (C) Qatranaite crystals
Image
( a ) Pale-green clinopyroxene xenocrysts with colourless <span class="search-highlight">cuspidine</span> mantle ...
Published: 01 December 2008
F ig . 5. ( a ) Pale-green clinopyroxene xenocrysts with colourless cuspidine mantle (plane polarized transmitted light image); ( b ) clinopyroxene xenocryst (CPX) partially replaced by cuspdine (C). Note the thin reaction rim of diopside (dark grey) between the compositionally-zoned
Image
( a ) Pale-green clinopyroxene xenocrysts with colourless <span class="search-highlight">cuspidine</span> mantle ...
Published: 01 December 2008
F ig . 5. ( a ) Pale-green clinopyroxene xenocrysts with colourless cuspidine mantle (plane polarized transmitted light image); ( b ) clinopyroxene xenocryst (CPX) partially replaced by cuspdine (C). Note the thin reaction rim of diopside (dark grey) between the compositionally-zoned
Image
Composition of <span class="search-highlight">cuspidine</span> from hybrid natrocarbonatite (July 2008) compared ...
Published: 01 December 2008
F ig . 13. Composition of cuspidine from hybrid natrocarbonatite (July 2008) compared with cuspidine-niocalite solid solutions in a June 2003 natrocarbonatite ( Mitchell and Belton 2004 ).
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BSE images showing the proportions of opaque and silicate minerals in metac...
Published: 01 November 2015
Fig. 1. BSE images showing the proportions of opaque and silicate minerals in metacabonate rock from spoil heap of the Baturinskaya-Vostochnaya-1-2 mine, Emanzhelinsk, and selected regions of rock. Ore, Opaque aggregates; La, larnite; Cus, cuspidine; Ell, fluorellestadite; Ap, fluorapatite; Rnd
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Composition variation of niocalite–<span class="search-highlight">cuspidine</span> solid solution from Oldoinyo L...
Published: 01 October 2004
F ig . 6. Composition variation of niocalite–cuspidine solid solution from Oldoinyo Lengai T56B (this work) and cuspidine-group minerals from diverse parageneses (after Keller et al. , 1995 ). W and N are the ideal compositions of wöhlerite and niocalite, respectively.