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grossite

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Journal Article

Vanadium-induced coloration in grossite (CaAl 4 O 7 ) and hibonite (CaAl 12 O 19 )

Matteo Ardit, Fernando Cámara, Ulf Hålenius
Published: 01 April 2021
American Mineralogist (2021) 106 (4): 599–608.
DOI: https://doi.org/10.2138/am-2020-7544
...Matteo Ardit; Fernando Cámara; Ulf Hålenius Abstract High concentrations of vanadium cause very unusual coloration in hibonite (purple) and grossite (light violet) crystals in an exotic mineral assemblage from Sierra de Comechingones (Argentina). In the hibonite (CaAl 12 O 19 ) structure vanadium...
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A terrestrial magmatic hibonite-grossite-vanadium assemblage: Desilication and extreme reduction in a volcanic plumbing system, Mount Carmel, Israel

William L. Griffin, Sarah E.M. Gain, Jin-Xiang Huang, Martin Saunders, Jeremy Shaw, Vered Toledo, Suzanne Y. O'Reilly
Published: 01 February 2019
American Mineralogist (2019) 104 (2): 207–219.
DOI: https://doi.org/10.2138/am-2019-6733
...William L. Griffin; Sarah E.M. Gain; Jin-Xiang Huang; Martin Saunders; Jeremy Shaw; Vered Toledo; Suzanne Y. O'Reilly Abstract Hibonite (CaAl 12 O 19 ) is a constituent of some refractory calcium-aluminum inclusions (CAIs) in carbonaceous meteorites, commonly accompanied by grossite (CaAl 4 O 7...
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Oxygen triclusters in crystalline CaAl 4 O 7 (grossite) and in calcium aluminosilicate glasses: 17 O NMR

J.F. Stebbins, J.V. Oglesby, S. Kroeker
Published: 01 October 2001
American Mineralogist (2001) 86 (10): 1307–1311.
DOI: https://doi.org/10.2138/am-2001-1019
...J.F. Stebbins; J.V. Oglesby; S. Kroeker Abstract We present 17 O MAS NMR data for crystalline calcium dialuminate (grossite), CaAl 4 O 7 and monoaluminate, CaAl 2 O 4 . The first of these contains an oxygen tricluster site and serves as a model compound for sites of this type in aluminosilicate...
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Grossite (CaAl 4 O 7 ); a rare phase in terrestrial rocks and meteorites

Dietmar Weber, Adolf Bischoff
Published: 01 August 1994
European Journal of Mineralogy (1994) 6 (4): 591–594.
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Hibonite-<span class="search-highlight">grossite</span> aggregates. ( a ) Large grain of hibonite-<span class="search-highlight">grossite</span> aggreg...

Hibonite-grossite aggregates. ( a ) Large grain of hibonite-grossite aggreg...

Published: 01 February 2019
Figure 4. Hibonite-grossite aggregates. ( a ) Large grain of hibonite-grossite aggregate with millimeter-size spheres of native V (V 0 ). ( b ) Transmitted-light photo of the transparent specimen, enclosing black spinel grain and rods of V 0 . ( c ) Phase map of b showing paragenesis
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SEM BSE images of the reaction zones from experiments 2–4 showing a similar...

SEM BSE images of the reaction zones from experiments 2–4 showing a similar...

Published: 01 May 2022
Figure 2. SEM BSE images of the reaction zones from experiments 2–4 showing a similar mineral sequence from hibonite, grossite, to krotite + quenched melt glass. Elongated spinel, indicated by arrows, occurs intergrown with hibonite only from experiment 2 in a , whereas euhedral spinel
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Chondrite-normalized trace-element abundances. ( a ) Hibonite in hibonite-g...

Chondrite-normalized trace-element abundances. ( a ) Hibonite in hibonite-g...

Published: 01 February 2019
Figure 10. Chondrite-normalized trace-element abundances. ( a ) Hibonite in hibonite-grossite aggregates. ( b ) Mean hibonite in aggregates vs. mean hibonite included in corundum. ( c ) Coexisting hibonite-grossite pairs, linked by color. (Color online.)
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Backscattered electron image of E1-005 (adapted from Ivanova et al. 2002 )...

Backscattered electron image of E1-005 (adapted from Ivanova et al. 2002 )...

Published: 01 May 2009
F igure 1. Backscattered electron image of E1-005 (adapted from Ivanova et al. 2002 ). The innermost core of the inclusion consists mainly of grossite (Gr) intergrown with perovskite (Pv) and melilite (Mel) that is pure gehlenite (Ak 0 ); external to this is a zone rich in dmitryivanovite (CA
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CaO-Al 2 O 3 -SiO 2 liquidus diagram at 1 atm. pressure (after Osborn and ...

CaO-Al 2 O 3 -SiO 2 liquidus diagram at 1 atm. pressure (after Osborn and ...

Published: 01 February 2019
Figure 12. CaO-Al 2 O 3 -SiO 2 liquidus diagram at 1 atm. pressure (after Osborn and Muan 1960; Gentile and Foster 1963 ), showing compositions of hibonite-grossite-spinel aggregates, and calculated and analyzed melts; red arrows show the effects of desilication, and crystallization of hibonite
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Polyhedral representation of the <span class="search-highlight">grossite</span> structure in a perspective view a...

Polyhedral representation of the grossite structure in a perspective view a...

Published: 01 April 2021
Figure 2. Polyhedral representation of the grossite structure in a perspective view along [101] ( a ) Tricluster structure based on three Al tetrahedra that share one oxygen atom per molecular unit ( b ). Figures were drawn with Vesta 3.4.6 ( Momma and Izumi 2011 ). (Color online.)
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Detail of the matrix of the rock showing pleochroic <span class="search-highlight">grossite</span> (gro) associat...

Detail of the matrix of the rock showing pleochroic grossite (gro) associat...

Published: 01 April 2021
Figure 4. Detail of the matrix of the rock showing pleochroic grossite (gro) associated with dellagiustaite (dgt) and perovskite (pv) in a thin section. (Color online.)
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Room-temperature polarized absorption spectra of a <span class="search-highlight">grossite</span> single-crystal ...

Room-temperature polarized absorption spectra of a grossite single-crystal ...

Published: 01 April 2021
Figure 9. Room-temperature polarized absorption spectra of a grossite single-crystal from Sierra de Comechingones (doubly polished sections of 57 μm thick along X and Y, and 68 μm thick along Z). (Color online.)
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Peak deconvolution of <span class="search-highlight">grossite</span> single-crystal optical spectra along X ( a )...

Peak deconvolution of grossite single-crystal optical spectra along X ( a )...

Published: 01 April 2021
◂▴Figure 10. Peak deconvolution of grossite single-crystal optical spectra along X ( a ), Y ( b ), and Z ( c ). (Color online.)
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( a ) Phase map of aggregate showing randomly oriented hibonite plates, wit...

( a ) Phase map of aggregate showing randomly oriented hibonite plates, wit...

Published: 01 February 2019
Figure 6. ( a ) Phase map of aggregate showing randomly oriented hibonite plates, with narrow resorbed corundum cores, and hibonite+grossite intergrowths at edges of plates. Grossite (light green) is euhedral against CaF 2 (orange), the last phase to crystallize. Spinels (blue-green
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Hibonite-<span class="search-highlight">grossite</span> aggregate is illustrating crystallization sequence. ( a–e...

Hibonite-grossite aggregate is illustrating crystallization sequence. ( a–e...

Published: 01 February 2019
Figure 5. Hibonite-grossite aggregate is illustrating crystallization sequence. ( a–e ) Resorbed corundum in hibonite reflects peritectic reaction L + Cor → Hib, followed by grossite + spinel ± krotite; fluorite and Ca 4 Al 6 F 2 O 12 crystallize last. V 0 appears to separate from the melt
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High-Al (mean 15 wt%) V balls in a nest of <span class="search-highlight">grossite</span> between hibonite laths,...

High-Al (mean 15 wt%) V balls in a nest of grossite between hibonite laths,...

Published: 01 February 2019
Figure 8. High-Al (mean 15 wt%) V balls in a nest of grossite between hibonite laths, with outlines suggesting they were fluid when trapped. Note euhedral Ca 4 Al 6 O 12 F 2 is protruding into fluorite, the last phase to crystallize. The coexistence of Ca 4 Al 6 O 12 F 2 with grossite
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BSE image showing grossmanite with spinel, perovskite, and <span class="search-highlight">grossite</span> in meli...

BSE image showing grossmanite with spinel, perovskite, and grossite in meli...

Published: 01 October 2009
F igure 2. BSE image showing grossmanite with spinel, perovskite, and grossite in melilite near the rim of a type B1 CAI in USNM 7555.
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Calculated liquidus diagrams of the CaO-Al 2 O 3 -SiO 2 system at 3 pressu...

Calculated liquidus diagrams of the CaO-Al 2 O 3 -SiO 2 system at 3 pressu...

Published: 01 February 2019
= grossite, Grs = grossular; Krt = krotite; Lrn = larnite. Note the shrinkage of the fields of anorthite and gehlenite, and the expansion of the krotite and hibonite fields, with increasing P , and disappearance of the liquidus field of grossite above ~1 GPa. (Color online.)
Journal Article

Dmitryivanovite: A new high-pressure calcium aluminum oxide from the Northwest Africa 470 CH3 chondrite characterized using electron backscatter diffraction analysis

Takashi Mikouchi, Michael Zolensky, Marina Ivanova, Osamu Tachikawa, Mutsumi Komatsu, Loan Le, Matthieu Gounelle
Published: 01 May 2009
American Mineralogist (2009) 94 (5-6): 746–750.
DOI: https://doi.org/10.2138/am.2009.3080
...F igure 1. Backscattered electron image of E1-005 (adapted from Ivanova et al. 2002 ). The innermost core of the inclusion consists mainly of grossite (Gr) intergrown with perovskite (Pv) and melilite (Mel) that is pure gehlenite (Ak 0 ); external to this is a zone rich in dmitryivanovite (CA...
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Chromaticity values in the CIE 1931 color space chromaticity diagram for hi...

Chromaticity values in the CIE 1931 color space chromaticity diagram for hi...

Published: 01 April 2021
Figure 11. Chromaticity values in the CIE 1931 color space chromaticity diagram for hibonite and grossite along their main optical directions (O and E; and X, Y, and Z, respectively). (Color online.)