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1-20 OF 23 RESULTS FOR
chrysoberyl
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Journal Article
The Chrysoberyl- and Phosphate-Bearing Albite Pegmatite of Malga Garbella, Val Di Rabbi, Trento Province, Italy
Pietro Vignola, Michele Zucali, Nicola Rotiroti, Gaia Marotta, Andrea Risplendente, Alessandro Pavese, Matteo Boscardin, Vittorio Mattioli, Giorgio Bertoldi
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 23 October 2018
The Canadian Mineralogist (2018) 56 (4): 411–424.
... the available specimens it is possible to infer that a blocky albite unit and masses of quartz (quartz cores) formed the main units of the dike. The pegmatite, composed mainly of primary albite (Ab 96 –Ab 100 ), also contains primary chrysoberyl, almandine, schorl, and muscovite as common accessory minerals...
Journal Article
How to facet gem-quality chrysoberyl: Clues from the relationship between color and pleochroism, with spectroscopic analysis and colorimetric parameters
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1747–1758.
... and the so-called alexandrite effect wherein the perceived color of a mineral changes with different lighting conditions (i.e., daylight vs. incandescent light). In this article we have collected ultraviolet/visible/near-infrared (UV-Vis-NIR) spectra of a gem-quality, synthetic Cr-bearing chrysoberyl crystal...
Journal Article
Structural investigation of (130) twins and rutile precipitates in chrysoberyl crystals from Rio das Pratinhas in Bahia (Brazil)
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2015
American Mineralogist (2015) 100 (4): 861–871.
...Sandra Drev; Matej Komelj; Matjaž Mazaj; Nina Daneu; Aleksander Rečnik Abstract We studied V-shaped twins of chrysoberyl (BeAl 2 O 4 ) from Rio das Pratinhas pegmatites near Arataca in the Bahia state of Brazil. The local structure of the twin boundaries was determined using powder X-ray...
Includes: Supplemental Content
Journal Article
MINERALOGY AND GEOCHEMISTRY OF PEGMATITES ON MOUNT BEGBIE, BRITISH COLUMBIA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 129–164.
... (beryl, chrysoberyl, bertrandite, euclase, trilithionite, Li-muscovite, petalite, pollucite), rare element-bearing oxide minerals (columbite-tantalite, bismutotantalite, Nb-rutile, cassiterite, hübnerite, qitianlingite), phosphate minerals (triplite, lithiophilite, Mn-rich apatite, xenotime, monazite...
Journal Article
TERTIARY PEGMATITE DIKES OF THE CENTRAL ALPS
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 191–219.
...-REE-U oxide, Y-REE phosphate, Mn-Fe-phosphate, Ti-Zr-silicate, Be-Y-REE-U-silicate and oxide minerals (beryl, chrysoberyl, bertrandite, bavenite, and milarite), garnet (almandine-spessartine), tourmaline (schorl to rare elbaite), bismuthinite, magnetite, and rarely dumortierite and helvite...
Journal Article
Mineralogy and Origin of the Dumortierite-Bearing Pegmatites of Virorco, San Luis, Argentina
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 August 2012
The Canadian Mineralogist (2012) 50 (4): 873–894.
... and kyanite as the major phases; the accessory and trace minerals include beryl, chrysoberyl, garnet, fluorapatite, columbite-(Mn) to tantalite-(Mn), pollucite, gahnite, zircon, uraninite and thorite. Holmquistite was found in the exocontact assemblage. Primary textures of magmatic origin were partially...
Journal Article
Chrysoberyl, beryl and zincian spinel mineralization in granulite-facies Archaean rocks at Dowerin, Western Australia
Journal: Mineralogical Magazine
Published: 01 December 2002
Mineralogical Magazine (2002) 66 (6): 985–1002.
...P. J. Downes; A. W. R. Bevan Abstract A deposit of chrysoberyl (BeAl 2 O 4 ), including the variety alexandrite, occurs near Dowerin, in the southwestern region of the Archaean Yilgarn Craton, Western Australia. The deposit is situated in the northern part of the Lake Grace Terrain, a crustal...
Journal Article
Be-Minerals: Synthesis, Stability, and Occurrence in Metamorphic Rocks
Publisher: Mineralogical Society of America
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 551–589.
... for special optical purposes, and as gemstones. Beryl, ideally Al 2 Be 3 Si 6 O 18 , bertrandite, Be 4 Si 2 O 7 (OH) 2 , and phenakite, Be 2 SiO 4 are mined and processed as ores of Be. Beryl and chrysoberyl are used as maser and laser crystals, and bromellite BeO has outstanding properties...
Journal Article
P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2000
The Canadian Mineralogist (2000) 38 (5): 1163–1175.
... chrysoberyl, emerald and phenakite. The pegmatite is associated with a two-mica peraluminous Hercynian granite, and intrude dunites of the Schistose domain in the Galician Tras-Os-Montes Zone. The composition of fluid inclusions in emerald and phenakite has been determined using a Raman microprobe...
Journal Article
Solubility and stability of beryl in granitic melts
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 1999
American Mineralogist (1999) 84 (5-6): 733–745.
...Joseph M. Evensen; David London; Richard F. Wendlandt Abstract Beryllium contents of granitic melts at saturation in beryl (+ or - chrysoberyl, phenakite, or quartz) have been determined by forward- and reverse-direction experiments at 650-850 degrees C and 200 MPa using natural beryl...
Journal Article
Metasomatism at a granitic pegmatite-dunite contact in Galicia; the Franqueira occurrence of chrysoberyl (alexandrite), emerald, and phenakite; discussion and reply
Gerhard Franz, H. Albert Gilg, Guenter Grundmann, Giulio Morteani, Agustin Martin-Izard, Andres Paniagua, Damaso Moreiras, Rogelio D. Acevedo, Celia Marcos-Pascual
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 1996
The Canadian Mineralogist (1996) 34 (6): 1329–1336.
Journal Article
Metasomatism at a granitic pegmatite-dunite contact in Galicia; the Franqueira occurrence of chrysoberyl (alexandrite), emerald, and phenakite
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 August 1995
The Canadian Mineralogist (1995) 33 (4): 775–792.
Journal Article
Relationship between crystallographic orientation and the "alexandrite effect" in synthetic alexandrite
Journal: Mineralogical Magazine
Published: 01 March 1995
Mineralogical Magazine (1995) 59 (1): 111–114.
Journal Article
Heat capacities and thermodynamic functions for beryl, Be 3 Al 2 Si 6 O 18 , phenakite, Be 2 SiO 4 , euclase, BeAlSiO 4 (OH), bertrandite, Be 4 Si 2 O 7 (OH) 2 , and chrysoberyl, BeAl 2 O 4
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1986
American Mineralogist (1986) 71 (3-4): 557–568.
... of chrysoberyl have been measured from 340 to 800 K. The resulting data have been combined with solution and phase-equilibrium experimental data and simultaneously fit using the program phas20 to provide an internally consistent set of thermodynamic properties for several important beryllium phases...
Journal Article
Phase equilibria and thermodynamic properties of minerals in the BeO-Al 2 O 3 -SiO 2 -H 2 O (BASH) system, with petrologic applications
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1986
American Mineralogist (1986) 71 (3-4): 277–300.
...Mark D. Barton Abstract The phase relations and thermodynamic properties of behoite (Be(OH) 2 ), bertrandite (Be 4 Si 2 O 7 (OH) 2 ), beryl (Be 3 Al 2 Si 6 O 18 ), bromellite (BeO), chrysoberyl (BeAl 2 O 4 ), euclase (BeAlSiO 4 (OH)), and phenakite (Be 2 SiO 4 ) have been quantitatively evaluated...
Journal Article
Surinamite, taaffeite, and beryllian sapphirine from pegmatites in granulite-facies rocks of Casey Bay, Enderby Land, Antarctica
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 1981
American Mineralogist (1981) 66 (9-10): 1022–1033.
...Edward S. Grew Abstract Sunnamite, taaffeite, beryllian sapphirine, niobian rutile, chrysoberyl, and wagnerite occur in sillimanite-rich, medium-grained segregations in two pegmatites of probable late Archean age which cut granulite-facies rocks near McIntyre Island (67°22′S, 49°05′E) in Casey Bay...
Journal Article
Multisystems analysis of beryllium mineral stabilities; the system BeO-Al<2) O<3) -SiO<2) -H<2) O
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 1978
American Mineralogist (1978) 63 (7-8): 664–676.
...D. M. Burt Abstract Seven commonly associated minerals in the system BeO–Al 2 O 3 –SiO 2 –H 2 O include chrysoberyl, phenakite, euclase, bertrandite, beryl, kaolinite, and quartz. The phase rule implies that not more than six of these minerals can coexist at an invariant point...
Journal Article
Force constant for Be-O stretching in behoite and in chrysoberyl
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 1975
American Mineralogist (1975) 60 (5-6_Part_1): 481–482.
...Dale A. Huckaby; Terry L. Wright; Arthur J. Ehlmann Abstract An absorption band near 780 cm -1 in the infrared spectra of behoite [β-Be(OH) 2 ] and of chrysoberyl [Al 2 BeO 4 ] was assigned to the vibration of a beryllium atom moving in a tetrahedral cage of four fixed oxygen atoms. Using...
Journal Article
Chromium III Centers in Synthetic Alexandrite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 1974
American Mineralogist (1974) 59 (1-2): 159–165.
Journal Article
Crystal-field spectra of chrysoberyl, alexandrite, peridot, and sinhalite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 1965
American Mineralogist (1965) 50 (11-12): 1972–1981.
...E. F. Farrell; R. E. Newnham Abstract The optical absorption spectra of the isomorpbous minerals chrysoberyl, alexandrite, peridot, and sinhalite have been measured in polarized light at 77° K. Electronic transitions between the 6 A 1 ground state of Fe 3+ and a number of quartet states give rise...