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celsian

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Journal Article
Published: 12 September 2019
Mineralogical Magazine (2019) 83 (6): 821–827.
... are alstonite, baryte, celsian, diopside, fresnoite, mica, suzukiite, walstromite, witherite and minerals of the cerchiaraite group. Bavsiite is optical uniaxial (+), with ω = 1.725(3) and ε = 1.750(3) (589 nm) and pleochroic. Electron microprobe analyses yielded the empirical formula Na 0.02 Ba 1.98 Ti 0.16 Fe...
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Journal Article
Published: 01 August 2017
Mineralogical Magazine (2017) 81 (4): 949–974.
..., celsian, hyalophane, Ba-orthoclase and fresnoite, but before nepheline ± kalsilite, and later sulfates, carbonates, an unidentified ‘X-mineral’ close to Al- and Fe-rich tobermorite and goethite. Micro-Raman spectroscopy of kuratite shows five bands near 133–155 (strong), 399–401, 545–566, 684–693...
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Journal Article
Published: 01 September 2016
The Canadian Mineralogist (2016) 54 (5): 1129–1146.
... zones. Rare thin leucocratic “aplite” dikes contain slawsonite, celsian, microcline, natrolite, prehnite, analcime, and thomsonite-Ca. Slawsonite forms aggregates exhibiting symplectite-like microstructures up to 2 mm long and is associated with euhedral zoned celsian micrograins up to 100 μm in size...
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Journal Article
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1562–1567.
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Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2272–2279.
... in association with abundant celsian and hyalophane, replacing the original calcic plagioclase (bytownite). A study of this curious natural slawsonite-celsian-hyalophane assemblage provides a valuable insight into feldspar stability and petrogenesis. Whole-rock geochemical signatures of the picrite sill...
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Journal Article
Published: 01 October 2012
The Canadian Mineralogist (2012) 50 (5): 1233–1242.
... from the Wigwam deposit of Southeastern British Columbia, Canada. It is a metamorphic mineral formed under greenschist-facies conditions as part of an assemblage that includes quartz, celsian, apatite, sphalerite, pyrrhotite, galena, pyrite, zoltaiite, and batisivite. Greenwoodite has a Mohs hardness...
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Journal Article
Published: 01 August 2011
The Canadian Mineralogist (2011) 49 (4): 983–1000.
...Leone Melluso; Vincenzo Morra; Roberto de’ Gennaro Abstract A Ba-rich alkali feldspar (hyalophane to almost pure celsian) coexists with melilite in the groundmass of the S. Caterina melafoidite lava, Mt. Vulture, Italy. The accompanying phases are a very Al- and Ti-rich clinopyroxene, magnetite...
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Journal Article
Published: 01 April 2011
The Canadian Mineralogist (2011) 49 (2): 587–594.
.... It is closely associated with anandite, bazirite, celsian, devitoite, quartz and titantaramellite. The crystals occur in dark reddish brown foliated masses of irregular, undulating striated blades up to several mm in length, flattened on {100} and elongate and striated parallel to [001]. The mineral...
FIGURES
Journal Article
Published: 01 July 2010
American Mineralogist (2010) 95 (7): 1060–1068.
... thermal expansion coefficients for volume (α V ) have been combined with earlier results for end-member Na- and K-feldspars. Unlike AlSi 3 feldspars, Al 2 Si 2 feldspars, including anorthite and celsian from the present study, and Sr- and Pb-feldspar from other workers, show essentially constant...
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Journal Article
Published: 01 March 2010
European Journal of Mineralogy (2010) 22 (2): 199–214.
...Guanghai Shi; Neng Jiang; Yuwang Wang; Xin Zhao; Xia Wang; Guowu Li; Enoch Ng; Wenyuan Cui Abstract Barium (Ba) minerals identified in clinopyroxene rocks from the Myanmar jadeitite area include celsian, hyalophane, and hydrated barium aluminum silicate (an inferred barian zeolite). The hyalophane...
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Journal Article
Published: 01 January 2009
American Mineralogist (2009) 94 (1): 34–40.
...% celsian (Cn; BaAl 2 Si 2 O 8 ), and two populations of hyalophane are present: one with 16–23 mol% Cn, and the other with 50–53 mol% Cn. The two types of hyalophane occur in direct contact with each other. The albite component of K-feldspar and hyalophane is less than 4 mol%. The Fe 3+ :Fe 2...
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Journal Article
Published: 01 July 2005
European Journal of Mineralogy (2005) 17 (4): 515–535.
...Eric J. ESSENE; Christopher L. CLAFLIN; Giovanna GIORGETTI; Pilar M. MATA; Donald R. PEACOR; Péter ÁRKAI; Mark A. RATHMELL Abstract The occurrences of natural coexisting feldspars including hyalophane and also celsian delineate two-, three- and possibly four-phase fields in the system BaAl 2 Si 2...
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Journal Article
Published: 01 August 2001
The Canadian Mineralogist (2001) 39 (4): 1039–1051.
...Maria Candelas Moro; Maria Luisa Cembranos; Agustina Fernandez Abstract Des compositions de feldspath (Ba,K) se sont développées en association avec la cymrite en couches minces de celsian massif à grains fins interstratifié avec l’apatite, des sulfures, et la barite, ou bien en disséminations...
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Journal Article
Published: 01 June 1993
European Journal of Mineralogy (1993) 5 (3): 447–454.
Journal Article
Published: 01 April 1992
European Journal of Mineralogy (1992) 4 (2): 251–269.
Journal Article
Published: 01 April 1992
European Journal of Mineralogy (1992) 4 (2): 271–278.
Journal Article
Published: 01 February 1992
American Mineralogist (1992) 77 (1-2): 121–125.
...L. S. Zevin Abstract Synthetic celsian (barium feldspar) crystallized from a glass of nearly stoichiometric composition exhibited a diffraction pattem with very broad and almost absent diffraction peaks with l = odd indices (the basic ≈7.2-Å cell is assumed). Three models based on the random shift...
Journal Article
Published: 01 February 1992
European Journal of Mineralogy (1992) 4 (1): 209–212.
Journal Article
Published: 01 April 1989
European Journal of Mineralogy (1989) 1 (2): 239–248.
Journal Article
Published: 01 February 1985
Journal of the Geological Society (1985) 142 (1): 39–52.
... with the results of sphalerite geobarometry. Textural evidence indicates that the rare platy mineral cymrite (BaA1 2 Si 2 O 8 H 2 O) was widespread in mineralized lithologies during penetrative deformation, and has since largely been replaced by celsian. The P–T location of the experimentally determined reaction...