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tuperssuatsiaite

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Journal Article
Published: 01 October 2002
American Mineralogist (2002) 87 (10): 1458–1463.
...Fernando Cámara; Laurence A.J. Garvie; Bertrand Devouard; Thomas L. Groy; Peter R. Buseck Abstract The structure of tuperssuatsiaite from the Aris phonolite in central Namibia was refined to an R index of 0.075 for 905 observed reflections [ I > 2σ( I )] obtained with a four-circle X-ray...
FIGURES | View All (4)
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Lattice parameter ( a )  a  and ( b ) β vs. the average ionic radii (< r...
Published: 01 October 2002
F igure 4. Lattice parameter ( a ) a and ( b ) β vs. the average ionic radii (< r >) in the M1 + M2 sites for tuperssuatsiaite compared with data for raite, palygorskite, and tuperssuatsiaite. Symbols as follows: full dot = palygorskite, Grobéty et al. (1995) ; full triangle = raite
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Arrangement of octahedral sites in the crystal structures of windhoekite (l...
Published: 01 January 2012
Fig. 6 Arrangement of octahedral sites in the crystal structures of windhoekite (left) and tuperssuatsiaite (right) projected on (100). An additional Ca2 ( M 4) site is present in the structure of windhoekite but missing in the structure of tuperssuatsiaite. Note that all outer corners of Ca1
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Polyhedral representation of the crystal structures of windhoekite (left) a...
Published: 01 January 2012
Fig. 5 Polyhedral representation of the crystal structures of windhoekite (left) and tuperssuatsiaite (right) projected on (001). Light grey octahedra correspond to Fe sites M 1 and M 2; dark grey octahedra correspond to Ca-dominant sites M 3 and M 4 in windhoekite and Na-dominant site
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Ellingsenite (1), <span class="search-highlight">tuperssuatsiaite</span> (2), villiaumite (3), tobermorite (4), n...
Published: 01 October 2011
Fig. 2 Ellingsenite (1), tuperssuatsiaite (2), villiaumite (3), tobermorite (4), natrolite (5) and aegirine (6) in a vesicle within phonolite.
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<span class="search-highlight">Tuperssuatsiaite</span> sprays in a vug. The smaller dark laths are aegerine and t...
Published: 01 October 2002
F igure 1. Tuperssuatsiaite sprays in a vug. The smaller dark laths are aegerine and the clear crystals are zeolites. The scale bar is 1 mm in length.
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[100] zone axis SAED pattern of <span class="search-highlight">tuperssuatsiaite</span>.
Published: 01 October 2002
F igure 2. [100] zone axis SAED pattern of tuperssuatsiaite.
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The structure of <span class="search-highlight">tuperssuatsiaite</span> projected ( a ) along [100] and ( b ) alo...
Published: 01 October 2002
F igure 3. The structure of tuperssuatsiaite projected ( a ) along [100] and ( b ) along [001].
Journal Article
Published: 01 January 2012
European Journal of Mineralogy (2012) 24 (1): 171–179.
...Fig. 6 Arrangement of octahedral sites in the crystal structures of windhoekite (left) and tuperssuatsiaite (right) projected on (100). An additional Ca2 ( M 4) site is present in the structure of windhoekite but missing in the structure of tuperssuatsiaite. Note that all outer corners of Ca1...
FIGURES | View All (7)
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Infrared spectra of palygorskite-group minerals: windhoekite (a), tuperssua...
Published: 01 January 2012
Fig. 4 Infrared spectra of palygorskite-group minerals: windhoekite (a), tuperssuatsiaite from Aris, Namibia (b), palygorskite from Penchi, China (c), and yofortierite from Mt. Karnasurt, Lovozero massif, Kola peninsula, Russia (d).
Journal Article
Published: 01 July 2020
The Canadian Mineralogist (2020) 58 (4): 477–509.
...) 2 (H 2 O,OH) 4 · W ] is proposed based on the occupants of the four M sites. Within this scheme, windmountainite is the □-Fe 3+ -Mg-□ member. The palygorskite group includes six members: palygorskite (monoclinic and orthorhombic polytypes), yofortierite, tuperssuatsiaite, raite, windhoekite...
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Journal Article
Published: 01 August 2006
Mineralogical Magazine (2006) 70 (4): 405–418.
..., microcline, apophyllite, sphalerite, analcime, fluorite, villiaumite, hydroxylapatite, galena, makatite, quartz, eudialyte, kanemite, tuperssuatsiaite and korobitsynite. Sazhinite-(La) forms small euhedral crystals up to 1 mm long and 0.4 mm wide, elongated along [001] and flattened on (010), exhibiting...
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Journal Article
Published: 01 February 2006
The Canadian Mineralogist (2006) 44 (1): 105–115.
..., stillwellite-(Ce), titanite, cerite-(Ce), tuperssuatsiaite, steacyite, catapleiite, zakharovite, natrolite and microcline. It is transparent to translucent with a vitreous luster and white streak. It is brittle with a Mohs hardness of 5–6. It has no discernable cleavage or parting and an uneven fracture...
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Journal Article
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 243–251.
... absorption corrections (SADABS; Sheldrick 2008 ) were applied and identical data merged to give 7519 reflections covering the entire Ewald sphere and 1946 unique reflections with R merge = 1.5%. As with tuperssuatsiaite ( Cámara et al . 2002 ), there are numerous weak reflections violating the C...
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Journal Article
Published: 01 November 2018
The Canadian Mineralogist (2018) 56 (6): 905–912.
.... Lueshite appears to be one of the last-formed minerals and can be very abundant, covering most of some natrolite cavities. The same natrolite paragenesis also hosts tuperssuatsiaite and aegirine. A pyrochlore group mineral and fersmite on hydroxylgugiaite from an altered pegmatite on Mount Nakkaalaaq...
FIGURES
Journal Article
Journal: Clay Minerals
Published: 01 December 2014
Clay Minerals (2014) 49 (5): 765–766.
.... On the other hand, certain clay minerals have not been considered, including imogolite (but not allophane), volkonskoite and minerals of the sepiolite-palygorskite group with the exception of loughlinite (falcondoite, kalifersite, raite, tuperssuatsiaite, and yofortierite). Although, with the exception...
Journal Article
Published: 01 December 2013
Clays and Clay Minerals (2013) 61 (5): 475–476.
.... yofortierite, windhoekite, tuperssuatsiaite, raite, several of which have single-crystal, X-ray determinations of their structures). Although loughlinite (Na-rich sepiolite) is mentioned under sepiolite, no mention is made of these other minerals, not even in the chemistry description for palygorskite...
Journal Article
Published: 01 April 2008
American Mineralogist (2008) 93 (4): 667–675.
... positions, displacement factors, and occupancy factors of the O atoms of the H 2 O molecules were refined. Soft constraints were used to limit the Si-O bond distances to within the range observed in similar silicate structures, e.g., tuperssuatsiaite (1.58–1.63 Å, <1.61 Å>; Cámara et al. 2002...
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Journal Article
Published: 01 June 2010
The Canadian Mineralogist (2010) 48 (3): 661–671.
... that 15–20% of the phonolite is comprised of two-phase fluid + vapor-filled cavities. The miarolitic cavities host a range of agpaitic mineral species, including abundant villiaumite, aegirine, labuntsovite-group minerals, tuperssuatsiaite, natrolite, analcime, manganoneptunite, apophyllite-(KF), fluorite...
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Journal Article
Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1165–1173.
...Fig. 2 Ellingsenite (1), tuperssuatsiaite (2), villiaumite (3), tobermorite (4), natrolite (5) and aegirine (6) in a vesicle within phonolite. ...
FIGURES | View All (6)