1-20 OF 106 RESULTS FOR

grossite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 April 2021
American Mineralogist (2021) 106 (4): 599–608.
...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...
FIGURES | View All (11)
Journal Article
Published: 01 February 2019
American Mineralogist (2019) 104 (2): 207–219.
...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...
FIGURES | View All (14)
Journal Article
Published: 01 October 2001
American Mineralogist (2001) 86 (10): 1307–1311.
...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...
FIGURES | View All (5)
Journal Article
Published: 01 August 1994
European Journal of Mineralogy (1994) 6 (4): 591–594.
Image
Hibonite-<span class="search-highlight">grossite</span> aggregates. ( a ) Large grain of hibonite-<span class="search-highlight">grossite</span> 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
Image
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
Image
(a–f) BSE images. (a) Typical view of ‘white breccia’ fragments, with the l...
Published: 19 April 2023
symplectites. (d) Krotite grain with grossite inclusion, points of Raman spectra measurements are shown by yellow (krotite) and green (grossite) circles. (e) Fragment of ‘white breccia’, with area magnified in (f) indicated. (f) Cristobalite grain with mullite inclusions and red spot indicating the point
Image
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
Image
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.)
Image
Polyhedral representation of the <span class="search-highlight">grossite</span> 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.)
Image
Detail of the matrix of the rock showing pleochroic <span class="search-highlight">grossite</span> (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.)
Image
Room-temperature polarized absorption spectra of a <span class="search-highlight">grossite</span> 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.)
Image
Peak deconvolution of <span class="search-highlight">grossite</span> 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.)
Image
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
Image
Hibonite-<span class="search-highlight">grossite</span> 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
Image
High-Al (mean 15 wt%) V balls in a nest of <span class="search-highlight">grossite</span> 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
Image
( 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
Image
BSE image showing grossmanite with spinel, perovskite, and <span class="search-highlight">grossite</span> 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.
Image
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
Published: 01 May 2009
American Mineralogist (2009) 94 (5-6): 746–750.
...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...
FIGURES | View All (4)