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chiavennite

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Journal Article
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 21–32.
...Joel D. Grice; Henrik Friis; Roy Kristiansen Abstract Chiavennite (Mn endmember) and ferrochiavennite (Fe endmember) are beryllium silicate zeolites with chemical compositions close to Ca 1–2 (Mn,Fe)Si 5 Be 2 O 13 (OH) 2 ·2H 2 O. Five chiavennite crystals from four different localities, Chiavenna...
FIGURES | View All (5)
Journal Article
Published: 01 August 2015
European Journal of Mineralogy (2015) 27 (5): 659–667.
...Georgia Cametti; Thomas Armbruster Abstract Chiavennite (CaMnBeSi 5 O 13 (OH) 2 · 2H 2 O, Z = 4) is a rare Be-bearing zeolite mineral with an interrupted framework of four-connected [SiO 4 ] and three-connected [BeO 4 ] tetrahedra. A sample from the type locality in the Rhetic Alps of Italy has...
FIGURES | View All (7)
Journal Article
Published: 01 December 1995
European Journal of Mineralogy (1995) 7 (6): 1339–1344.
Journal Article
Published: 01 June 1983
American Mineralogist (1983) 68 (5-6): 623–627.
...Mirella Bondi; William L. Griffin; Vittorio Mattioli; Annibale Mottana Abstract Chiavennite occurs as euhedral orange grains and as crusts coating beryl in the alpine pegmatites crossing the Chiavenna ultramafics in the Rhetic Alps of Italy. It is usually associated with bavenite and several other...
Journal Article
Published: 01 June 1983
American Mineralogist (1983) 68 (5-6): 628–633.
...Gunnar Raade; Reidar Aamli; Micael H. Mladeck; Victor K. Din; Alf Olav Larsen; Arne Aasheim Abstract Chiavennite occurs as reddish orange spherulites in vugs of syenite pegmatite at four different localities in the southern Oslo Region of Norway. Chemical analysis and TGA give a formula very close...
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The crystal structures of barylite, <span class="search-highlight">chiavennite</span> and beryl; (a) barylite pro...
Published: 01 January 2002
Figure 36. The crystal structures of barylite, chiavennite and beryl; (a) barylite projected onto (001); circles are Ba atoms; tetrahedra form six-membered rings in the (001) plane; (b) barylite projected onto (010); note the three-connected vertices; (c) chiavennite projected onto (001
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SEM images of (A) a lueshite twin and a pyrochlore penetration twin on natr...
Published: 01 November 2018
Fig. 2. SEM images of (A) a lueshite twin and a pyrochlore penetration twin on natrolite, (B) small octahedra of pyrochlore and needles of fersmite on hydroxylgugiaite, (C) a fersmite group mineral on chiavennite, and (D) peterandresenite on chiavennite. (A) and (B) are from the Ilímaussaq
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<span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE ANALYTICAL DATA
Published: 01 January 2016
TABLE 1. CHIAVENNITE AND FERROCHIAVENNITE ANALYTICAL DATA
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<span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE SELECTED BOND LENGTHS (Å)
Published: 01 January 2016
TABLE 4A. CHIAVENNITE AND FERROCHIAVENNITE SELECTED BOND LENGTHS (Å)
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CRYSTAL STRUCTURAL DATA FOR <span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE SAMPLES
Published: 01 January 2016
TABLE 2. CRYSTAL STRUCTURAL DATA FOR CHIAVENNITE AND FERROCHIAVENNITE SAMPLES
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<span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE COORDINATION SEQUENCES AND VERTEX SYMBOLS
Published: 01 January 2016
TABLE 5. CHIAVENNITE AND FERROCHIAVENNITE COORDINATION SEQUENCES AND VERTEX SYMBOLS
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<span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE HYDROGEN BONDS AND SELECTED BOND-VALENCE S...
Published: 01 January 2016
TABLE 4C. CHIAVENNITE AND FERROCHIAVENNITE HYDROGEN BONDS AND SELECTED BOND-VALENCE SUMS
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<span class="search-highlight">CHIAVENNITE</span>, CHIAVENNA, ITALY: ATOMIC COORDINATES AND ISOTROPIC DISPLACEMEN...
Published: 01 January 2016
TABLE 3A. CHIAVENNITE, CHIAVENNA, ITALY: ATOMIC COORDINATES AND ISOTROPIC DISPLACEMENT PARAMETERS (Å 2 )
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<span class="search-highlight">CHIAVENNITE</span>, UTÖ, SWEDEN: ATOMIC COORDINATES AND ISOTROPIC DISPLACEMENT PAR...
Published: 01 January 2016
TABLE 3B. CHIAVENNITE, UTÖ, SWEDEN: ATOMIC COORDINATES AND ISOTROPIC DISPLACEMENT PARAMETERS (Å 2 )
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Scanning-electron-microscope image of peterandresenite on <span class="search-highlight">chiavennite</span>. Note...
Published: 01 August 2014
Fig. 2 Scanning-electron-microscope image of peterandresenite on chiavennite. Note the fractures in peterandresenite caused by dehydration in the vacuum.
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<span class="search-highlight">CHIAVENNITE</span> AND FERROCHIAVENNITE SELECTED HYDROGEN BONDS; BOND DISTANCES (Å...
Published: 01 January 2016
TABLE 4B. CHIAVENNITE AND FERROCHIAVENNITE SELECTED HYDROGEN BONDS; BOND DISTANCES (Å), O–HO, O–H–O AND H–O–H ANGLES (°)
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<span class="search-highlight">Chiavennite</span>: a [100] projection of the crystal structure showing the OH gro...
Published: 01 January 2016
Fig. 2. Chiavennite: a [100] projection of the crystal structure showing the OH group terminations of the BeO 3 OH tetrahedra that interrupts polymerization in the [010] direction.
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<span class="search-highlight">Chiavennite</span>: a [010] projection of the crystal structure showing the Si–Be-...
Published: 01 January 2016
Fig. 1. Chiavennite: a [010] projection of the crystal structure showing the Si–Be-tetrahedral framework. The one Ca atom and two H 2 O groups are shown centered in the nine-fold ring channels.
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<span class="search-highlight">Chiavennite</span>: approximately a [010] projection showing the nine-fold ring of...
Published: 01 January 2016
Fig. 3. Chiavennite: approximately a [010] projection showing the nine-fold ring of tetrahedra centered by one Ca atom and two H 2 O groups. Note the H 16A bond to O 10.
Journal Article
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 285–296.
... observed reflections. The zeolite structure is isostructural with chiavennite, consisting of intersecting channels of nine-, six-, five-, and four-fold rings. The strongest eight reflections of the X-ray powder-diffraction pattern [ d (obs.) in Å ( I ) ( hkl )] are: 15.555 (100) (002), 4.104 (29) (1̅12...
FIGURES | View All (5)