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allotropes

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Journal Article
Published: 14 November 2018
Journal of the Geological Society (2018) 176 (2): 337-347.
...Falko Langenhorst; Marcello Campione Abstract Carbon is found in nature in a huge variety of allotropic forms and recent research in materials science has encouraged the development of technological materials based on nanocarbon. Carbon atoms with sp 2 or sp 3 hybridization can be thought...
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Structures of selected <b>allotropes</b> of carbon.
Published: 01 January 2013
Figure 1 Structures of selected allotropes of carbon.
Image
An open-framework <b>allotrope</b> of silicon Si 24  from foil no. 5312. ( a ) Mos...
Published: 01 January 2019
Figure 7. An open-framework allotrope of silicon Si 24 from foil no. 5312. ( a ) Mosaic grain composed of nanocrystals of Si 24 . Bright-field image. ( b ) HAADF image of the mosaic crystal of Si 24 showing the individual nanocrystals. The inset image in the upper-right corner displays a higher
Journal Article
Published: 01 January 2019
American Mineralogist (2019) 104 (1): 140-149.
...Figure 7. An open-framework allotrope of silicon Si 24 from foil no. 5312. ( a ) Mosaic grain composed of nanocrystals of Si 24 . Bright-field image. ( b ) HAADF image of the mosaic crystal of Si 24 showing the individual nanocrystals. The inset image in the upper-right corner displays a higher...
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Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2433-2436.
... meteorite; it is a new allotropic form of aluminum. It occurs as rare crystals up to ~10 μm across in meteoritic fragments that contain evidence of a heterogeneous distribution of pressures and temperatures during impact shock, in which some portions of the meteorite reached at least 5 GPa and 1200 °C...
FIGURES
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Carbon K-edge spectra from different carbon-bearing phases. From top to bot...
Published: 01 January 2013
Figure 6 Carbon K-edge spectra from different carbon-bearing phases. From top to bottom: three allotrope of pure carbon: diamond, graphite and amorphous carbon and different carbon-bearing minerals: hydrotalcite [Mg 6 Al 2 (CO 3 )(OH) 16 ·4(H 2 O)], desautelsite [Mg 6 Mn 2 (CO 3 )(OH) 16 ·4(H 2 O
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Equilibrium speciation of SO 2(g)  at 1 bar and temperatures from 500 to 13...
Published: 01 November 2018
Figure 1. Equilibrium speciation of SO 2(g) at 1 bar and temperatures from 500 to 1300 °C. The speciation was calculated using a Gibbs free energy minimization using the program HSC8 from Outotec. SO 2(g) dissociates to SO 3(g) , SO (g) , O 2(g) and sulfur allotropes, the most prominent
Journal Article
Published: 15 March 2019
Journal of the Geological Society (2019) 176 (2): 335-336.
... School of Milano Bicocca. This collection of lecture notes focusses on the structure of carbon allotropes, the geodynamics of deep Earth's carbon transport and fixation at mantle conditions, carbon degassing by ascending magmas, and the vast tectonic carbon degassing at the Earth's surface...
Journal Article
Published: 01 January 2013
Reviews in Mineralogy and Geochemistry (2013) 75 (1): 47-77.
...Figure 1 Structures of selected allotropes of carbon. ...
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Journal Article
Published: 01 May 2014
American Mineralogist (2014) 99 (5-6): 1179.
...-DOE target of 9 wt% H 2 for on-board H 2 storage systems. Four of her publications on these types of clathrates in 2002, 2004, and 2007 have already been cited almost 800 times. (2) Her discovery of several new high-pressure allotropes of carbon, including a superhard form of graphite as well...
Journal Article
Published: 01 March 2014
European Journal of Mineralogy (2014) 26 (2): 267-277.
.... ( 1968 ): A new allotropic form of carbon from Ries crater . Science , 161 , 363 – 364 . El Goresy A. Gillet P. Chen M. Kunstler F. Graup G. Stahle V. ( 2001 ): In situ discovery of shock-induced graphite-diamond transition in gneisses from the Ries crater, Germany...
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Journal Article
Journal: Elements
Published: 01 December 2014
Elements (2014) 10 (6): 447-452.
... particles. Electrons are intrinsically confined by their quantum-mechanical nature to flow in the almost one-dimensional channel of the CNT, unconstrained by lateral collisions. The two most common crystalline forms (allotropes) of carbon are diamond and graphite. Graphite is a stack of graphene layers...
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Journal Article
Journal: Elements
Published: 01 April 2010
Elements (2010) 6 (2): 75-80.
... allotropic forms of native sulfur: two are crystalline, while one is amorphous and commonly referred to as plastic sulfur. Sulfur crystals belong either to the orthorhombic or monoclinic crystal systems. They are constructed from S 8 molecules that form puckered, eight-member rings of S atoms...
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Journal Article
Journal: Elements
Published: 01 June 2017
Elements (2017) 13 (3): 187-191.
... produced magnetite [i.e. via Fe(III) reduction]. The mineral rosickýite is another example. Typically an unstable, high temperature allotrope of elemental sulfur, there appears to be an association between metastable rosickýite, microbes, and organics ( Douglas and Yang 2002 ; Lau et al. 2017 ). Perhaps...
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Journal Article
Published: 01 October 2018
Mineralogical Magazine (2018) 82 (5): 1141-1145.
... , V. , Steinhardt , W.M. and Yudovskaya , M. ( 2014 ) Steinhardtite, a new body-centered-cubic allotropic form of aluminum from the Khatyrka CV3 carbonaceous chondrite . American Mineralogist , 99 , 2433 – 2436 . Burke , E.A.J. ( 2006 ) A mass discreditation of GQN minerals...
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Journal Article
Published: 01 March 2017
American Mineralogist (2017) 102 (3): 690-693.
.... Andronicos C.L. MacPherson G.J. Distler V.V. Eddy M.P. Kostin A. others . ( 2014 ) Steinhardtite, a new body-centered-cubic allotropic form of aluminum from the Khatyrka CV3 carbonaceous chondrite . American Mineralogist , 99 , 2433 – 2436 . Bindi L. Yao N. Lin C...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2008
DOI: 10.1144/SP303.3
EISBN: 9781862395510
... and the surface decides not just the size of the crystals and their shape but even the allotrope which forms, that is vaterite, aragonite or calcite and, hence, what is observed depends critically on nucleation. Now why should this be, when calcite is the most stable? I believe this is especially problematic...
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Journal Article
Published: 01 January 2013
Reviews in Mineralogy and Geochemistry (2013) 75 (1): 7-46.
... in methanol (CH 3 OH), as well as occurring in its neutral state (C) in a variety of carbon allotropes. Moissanite is also relatively widely distributed as micro-crystals in the ejecta from some meteorite impact craters formed in continental crust, and it may be associated with impact diamond...
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Journal Article
Published: 01 October 2015
American Mineralogist (2015) 100 (10): 2340-2343.
.... Lin C. Hollister L.S. Poirier G.R. Andronicos C.L. MacPherson G.J. Distler V.V. Eddy M.P. Kostin A. ( 2014 ) Steinhardtite, a new body-centered-cubic allotropic form of aluminum from the Khatyrka CV3 carbonaceous chondrite . American Mineralogist , 99 , 2433 – 2436...
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Journal Article
Published: 01 January 2013
Reviews in Mineralogy and Geochemistry (2013) 75 (1): 423-448.
...Figure 6 Carbon K-edge spectra from different carbon-bearing phases. From top to bottom: three allotrope of pure carbon: diamond, graphite and amorphous carbon and different carbon-bearing minerals: hydrotalcite [Mg 6 Al 2 (CO 3 )(OH) 16 ·4(H 2 O)], desautelsite [Mg 6 Mn 2 (CO 3 )(OH) 16 ·4(H 2 O...
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