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gonnardite

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Journal Article
Published: 01 November 2000
American Mineralogist (2000) 85 (11-12): 1808-1815.
... Khibiny and Lovozero, Russia and two “gonnardite” samples from Tvedalen, Norway and Gignat, France. Observations are given to indicate that the Norwegian sample deduced to be tetranatrolite rather than gonnardite. Although the crystal structures of tetranatrolite and gonnardite are very similar...
FIGURES
Journal Article
Published: 01 September 1999
American Mineralogist (1999) 84 (9): 1445-1450.
...G. Artioli; E. Galli Abstract Gonnardite is a fibrous zeolite. Its chemical variability and the frequent close association with thomsonite and other zeolites have made the chemical and crystal structural definition of the mineral difficult. Only recently was the structural relationship to natrolite...
Journal Article
Published: 01 December 1967
American Mineralogist (1967) 52 (11-12): 1785-1794.
...Kazuo Harada; Shigeki Iwamoto; Kuniaki Kihara Abstract Erionite, phillipsite and gonnardite have been found in the amygdales of altered basalt, Mazé, Niigata Prefecture, Japan. Chemical, physical, optical and X-ray data are provided. Erionite is hexagonal, Pti-s/mmc . Copyright © 1967...
Journal Article
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 543-554.
... on gonnardite. Hansesmarkite is biaxial (+) with refractive indices (white light): α = 1.683(2), β = 1.698(2) and γ = 1.745(3); 2V (meas.) = 60.7(6)° and 2V (calc.) = 60.3°. The mineral exhibits moderate dispersion ( r > v ) and is pleochroic with X (almost colourless) < Y (pale yellow) << Z...
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Journal Article
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1549-1562.
..., with a white streak and vitreous luster. Crystal aggregates are botryoidal masses up to 1.5 mm in size. The mineral is brittle with a good {011} parting. Associated minerals include aegirine, natrolite, gmelinite, and gonnardite. Garronite-Na is monoclinic, space group I 2, with unit-cell parameters refined...
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Journal Article
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 685-703.
...Malcolm Ross; Marta J. K. Flohr; Daphne R. Ross Abstract The zeolite minerals of the natrolite group (natrolite, tetranatrolite, paranatrolite, mesolite, scolecite, thomsonite, gonnardite, edingtonite, and tetraedingtonite) have the general formula (Na,Ca,Ba) 8–16 (Al,Si) 40 O 80 · n H 2 O...
Journal Article
Published: 01 October 2002
American Mineralogist (2002) 87 (10): 1307-1320.
...Philip S. Neuhoff; Scott Kroeker; Lin-Shu Du; Thráinn Fridriksson; Jonathan F. Stebbins Abstract Disordering of Si and Al in natrolite, scolecite, mesolite, and gonnardite was investigated with 29 Si and 27 Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. The results...
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Journal Article
Published: 01 December 2011
Mineralogical Magazine (2011) 75 (6): 2869-2885.
... (analcime, chabazite-Ca, chabazite-Na, garronite, gismondine, gmelinite-Ca, gmelinite-Na, gobbinsite, gonnardite-Na, natrolite, mesolite, phillipsite-Ca, phillipsite-K, phillipsite-Na and scolecite) and other secondary minerals (calcite, smectite-group minerals, goethite and Mn-oxides). Chabazite-Na...
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Journal Article
Published: 01 April 2005
Mineralogical Magazine (2005) 69 (2): 137-144.
...D. S. Coombs; C. A. Bosel; Y. Kawachi; L. A. Paterson Abstract A gonnardite-thomsonite-chabazite-calcite assemblage forms a cement in the Foveaux Formation, a fossiliferous gabbroic boulder bed that accumulated at the base of a sea cliff cut in a Permian igneous complex during late Oligocene–early...
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Image
Hemispherical aggregates of <b>gonnardite</b>-Na with natrolite; the field of view...
Published: 01 December 2011
F ig . 4. Hemispherical aggregates of gonnardite-Na with natrolite; the field of view is 8 cm across.
Image
The variation in the number of Ca a.p.f.u. for <b>gonnardite</b>-Na–natrolite samp...
Published: 01 December 2011
F ig . 7. The variation in the number of Ca a.p.f.u. for gonnardite-Na–natrolite samples.
Image
Photomicrograph, crossed polars, showing cross sections of <b>gonnardite</b> prism...
Published: 01 April 2005
F ig . 2. Photomicrograph, crossed polars, showing cross sections of gonnardite prisms (almost square, black), surrounded by epitaxial growths of thomsonite laths (birefringent, white) near the edge of a void (upper left). The original cavity wall is near the base. (OU 36883, Foveaux Formation).
Image
Atomic proportions in Foveaux Formation zeolites: <b>gonnardite</b> (go), small tr...
Published: 01 April 2005
F ig . 5. Atomic proportions in Foveaux Formation zeolites: gonnardite (go), small triangles; thomsonite (th), squares; mesolite (me), open circles; scolecite (sc), upright crosses; inferred scolecite-mesolite intergrowths between me and sc, diagonal crosses; chabazites (ch), large triangles
Image
Laser Raman spectrum (100–1775 cm −1 ) for <b>gonnardite</b> from Blackhead Quarry...
Published: 01 August 2003
F ig . 4. Laser Raman spectrum (100–1775 cm −1 ) for gonnardite from Blackhead Quarry.
Image
(a) The <b>gonnardite</b> structure projected on (001) with the  a -axis vertical,...
Published: 01 January 2001
Figure 4. (a) The gonnardite structure projected on (001) with the a -axis vertical, showing the disordered framework (i.e. no distinction between the tetrahedra) and channel contents. Each [001] channel can contain both Na atoms (small black circles) and Ca atoms (small white circles) similar
Journal Article
Published: 01 May 2019
American Mineralogist (2019) 104 (5): 659-670.
... emplaced into a sedimentary sequence and are characterized by high zeolite contents (Endhalden: 48 wt%, Fohberg: 45 wt%) with the temporal sequence: ± thomsonite-Ca ± mesolite – gonnardite – natrolite – analcime. In the western Kaiserstuhl zeolite contents are lower (Kirchberg: 26 wt% or less...
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Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 95-104.
.... It is associated with microcline, albite, natrolite, gonnardite, aegirine, siderite, elpidite, gaidonnayite, zircon, franconite, dawsonite, rhodochrosite, cryolite, rutile, and sphalerite. Lecoqite-(Y) forms radiating, spray-like aggregates in compact, tightly packed masses to 2.5 cm across, composed of flexible...
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Journal Article
Published: 01 February 2009
The Canadian Mineralogist (2009) 47 (1): 193-204.
... orange in color, with a white streak and vitreous luster. Bladed crystals are prismatic, having forms {111̅} and {101̅}; they are elongate on [101], up to 10 mm in length. Associated minerals include aegirine, albite, analcime, ancylite-(Ce), calcite, catapleiite, gonnardite, hydrotalcite, kupletskite...
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Journal Article
Published: 01 October 2008
The Canadian Mineralogist (2008) 46 (5): 1343-1354.
..., was found in the Poudrette pegmatite, Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. It is associated with albite, aegirine, natrolite, gonnardite, siderite, petersenite-(Ce), franconite, dawsonite, analcime, quartz, eudidymite, catapleiite, gaidonnayite, monazite-(Ce), calcite, adamsite-(Y...
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Journal Article
Published: 01 April 2008
The Canadian Mineralogist (2008) 46 (2): 413-422.
... with tundrite-(Ce) are aegirine, analcime, an astrophyllite-group mineral, catapleiite, a eudialyte-group mineral, gonnardite, mangan-neptunite, monazite-(Ce), natrolite, rhodochrosite, sphalerite and vinogradovite. Tundrite-(Ce) is triclinic, space group P 1̅, with the following unit-cell parameters, refined...
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