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Journal Article

Elasticity and high-pressure behavior of Mg 2 Cr 2 O 5 and CaTi 2 O 4 -type phases of magnesiochromite and chromite

Sean R. Shieh, Tauhid Belal Khan, Zhongying Mi, Mauritz van Zyl, Ricardo D. Rodriguez, Clemens Prescher, Vitali B. Prakapenka

Journal: American Mineralogist

Publisher: Mineralogical Society of America

Published: 01 March 2022

American Mineralogist (2022) 107 (3): 453–459.

DOI: https://doi.org/10.2138/am-2021-7853

...Sean R. Shieh; Tauhid Belal Khan; Zhongying Mi; Mauritz van Zyl; Ricardo D. Rodriguez; Clemens Prescher; Vitali B. Prakapenka Abstract In situ high-pressure and high-temperature X-ray diffraction studies on magnesiochromite, MgCr 2 O 4 , and a natural chromite, (Mg,Fe)(Al,Cr) 2 O 4 , using a laser...

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Journal Article

Pressure-volume equation of state for chromite and magnesiochromite: A single-crystal X-ray diffraction investigation

Fabrizio Nestola, Benedetta Periotto, Giovanni B. Andreozzi, Enrico Bruschini, Ferdinando Bosi

Journal: American Mineralogist

Publisher: Mineralogical Society of America

Published: 01 July 2014

American Mineralogist (2014) 99 (7): 1248–1253.

DOI: https://doi.org/10.2138/am.2014.4765

...Fabrizio Nestola; Benedetta Periotto; Giovanni B. Andreozzi; Enrico Bruschini; Ferdinando Bosi Abstract The pressure-volume equation of state for the two spinel end-member compositions chromite FeCr 2 O 4 and magnesiochromite MgCr 2 O 4 was determined for flux-grown synthetic single crystals...

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Journal Article

Structural relaxation around Cr 3+ and the red-green color change in the spinel (sensu stricto)-magnesiochromite (MgAl 2 O 4 -MgCr 2 O 4 ) and gahnite-zincochromite (ZnAl 2 O 4 -ZnCr 2 O 4 ) solid-solution series

Ulf Hålenius, Giovanni B. Andreozzi, Henrik Skogby

Journal: American Mineralogist

Publisher: Mineralogical Society of America

Published: 01 April 2010

American Mineralogist (2010) 95 (4): 456–462.

DOI: https://doi.org/10.2138/am.2010.3388

...Ulf Hålenius; Giovanni B. Andreozzi; Henrik Skogby Abstract Optical absorption spectra of flux-grown single crystals in the spinel s.s.-magnesiochromite and gahnite-zincochromite solid solutions were recorded with the aim of exploring variations in local Cr-O bond distance as a function...

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Journal Article

PATTERNS OF ZONATION IN MAGNESIOCHROMITE–CHROMITE FROM PLACERS OF BRITISH COLUMBIA, CANADA

Andrei Y. Barkov, Graham T. Nixon, Victor M. Levson, Robert F. Martin

Journal: The Canadian Mineralogist

Publisher: Mineralogical Association of Canada

Published: 01 August 2009

The Canadian Mineralogist (2009) 47 (4): 953–968.

DOI: https://doi.org/10.3749/canmin.47.4.953

...Andrei Y. Barkov; Graham T. Nixon; Victor M. Levson; Robert F. Martin Abstract Patterns of compositional zoning are documented in nine grains of magnesiochromite–chromite (Mgc–Chr), 0.3–0.4 mm in size, subhedral or subrounded, recovered from six placer deposits in British Columbia. Their core zones...

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Sludyanka <span class="search-highlight">magnesiochromite</span> in the Mg#–Cr# diagram. A – abyssal peridotite (...

Sludyanka magnesiochromite in the Mg#–Cr# diagram. A – abyssal peridotite (...

in Vanadian–Chromian Spinels (Sludyanka Metamorphic Complex, South Baikal Area). Magnesian Spinel > Russian Geology and Geophysics

Published: 01 June 2024

Fig. 9. Sludyanka magnesiochromite in the Mg#–Cr# diagram. A – abyssal peridotite ( Dick and Bullen, 1984 ), B – boninite ( Dick and Bullen, 1984 ), F-A – fore-arc basin ultramafics ( Ishii et al., 1992 ; Ohara and Ishii, 1998 ), L – layered intrusions ( Dick and Bullen, 1984 ), N-MORB – mid

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(a) Crystallographic orientations of <span class="search-highlight">magnesiochromite</span> (mgchr) inclusions p...

(a) Crystallographic orientations of magnesiochromite (mgchr) inclusions p...

in Crystallographic Methods for Non-destructive Characterization of Mineral Inclusions in Diamonds > Reviews in Mineralogy and Geochemistry

Published: 01 July 2022

Figure 11. (a) Crystallographic orientations of magnesiochromite (mgchr) inclusions plotted with their a -axes in the common asymmetric unit of spinel and diamond ( yellow shaded region ) show a clustering of a -axes near to the a -axis of their diamond hosts. (b) The orientations

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(a, b) Ellinaite associated with minerals of the <span class="search-highlight">magnesiochromite</span>–zincochro...

(a, b) Ellinaite associated with minerals of the magnesiochromite–zincochro...

in Mcconnellite, CuCrO 2 and ellinaite, CaCr 2 O 4 , from varicoloured spurrite marble of the Daba-Siwaqa area, Hatrurim Complex, Jordan > Mineralogical Magazine

Published: 17 March 2021

Fig. 2. (a, b) Ellinaite associated with minerals of the magnesiochromite–zincochromite series and cuprite. (a) Back-scattered electron image, (b) optical image – the characteristic bright-green colour of ellinaite is visible. (c, d) Series of sub-parallel mcconnellite crystals. (c) BSE image, (d

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Orientation of olivine (Ol), pyrope (Prp), and <span class="search-highlight">magnesiochromite</span> (Chr) inclu...

Orientation of olivine (Ol), pyrope (Prp), and magnesiochromite (Chr) inclu...

in Crystallographic Orientation and Geochemical Features of Mineral Inclusions in Diamonds > Russian Geology and Geophysics

Published: 01 May 2020

Fig. 2. Orientation of olivine (Ol), pyrope (Prp), and magnesiochromite (Chr) inclusions in the crystallographic system of a host diamond in studied samples. The diamond axes are directed as follows: a1 – downward, a2 – to the right, a3 – according to the rule of the right coordinate system

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REPRESENTATIVE MICROPROBE ANALYSES OF <span class="search-highlight">MAGNESIOCHROMITE</span> IN THE PERIDOTITES A...

REPRESENTATIVE MICROPROBE ANALYSES OF MAGNESIOCHROMITE IN THE PERIDOTITES A...

in Multiple episodes of melting, depletion, and enrichment of the Tethyan mantle: Petrogenesis of the peridotites and chromitites in the Jurassic Skenderbeu massif, Mirdita ophiolite, Albania > Lithosphere

Published: 14 July 2017

TABLE 6. REPRESENTATIVE MICROPROBE ANALYSES OF MAGNESIOCHROMITE IN THE PERIDOTITES AND CHROMITITES

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REPRESENTATIVE MICROPROBE ANALYSES OF MAGNESIOCHROMITE IN THE PERIDOTITES A...

Published: 14 July 2017

TABLE 6. REPRESENTATIVE MICROPROBE ANALYSES OF MAGNESIOCHROMITE IN THE PERIDOTITES AND CHROMITITES

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Plot of <span class="search-highlight">magnesiochromite</span> Cr # against olivine Fo value for the peridotites...

Plot of magnesiochromite Cr # against olivine Fo value for the peridotites...

in Tectonic Evolution of the Western Yarlung Zangbo Ophiolitic Belt, Tibet: Implications from the Petrology, Mineralogy, and Geochemistry of the Peridotites > The Journal of Geology

Published: 01 May 2016

Figure 12. Plot of magnesiochromite Cr # against olivine Fo value for the peridotites of the northern subbelt after Pearce et al. ( 2000 ). OSMA = olivine-spinel mantle array; FMM = fertile mid-ocean range basalt mantle; SSZ = suprasubduction zone peridotites; DJW = Dajiweng peridotites; CBZ

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The composition of grains of chromian spinel (<span class="search-highlight">magnesiochromite</span> – chromite s...

The composition of grains of chromian spinel (magnesiochromite – chromite s...

in CHROMIAN SPINEL FROM PGE-BEARING PLACER DEPOSITS, BRITISH COLUMBIA, CANADA: MINERALOGICAL ASSOCIATIONS AND PROVENANCE > The Canadian Mineralogist

Published: 01 August 2013

Fig. 3 The composition of grains of chromian spinel (magnesiochromite – chromite solid solutions) in placer samples used in this study ( n = 1199) expressed in terms of Cr/(Cr + Al) versus Fe 2+ /(Mg + Fe 2+ ). The symbols of the end-member spinels are: Mcr: magnesiochromite (MgCr 2 O 4 ), Chr

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Chemical composition of <span class="search-highlight">magnesiochromite</span> from the Vourinos chromitites in t...

Chemical composition of magnesiochromite from the Vourinos chromitites in t...

in SPINEL COMPOSITION, PGE GEOCHEMISTRY AND MINERALOGY OF THE CHROMITITES FROM THE VOURINOS OPHIOLITE COMPLEX, NORTHWESTERN GREECE > The Canadian Mineralogist

Published: 01 December 2011

Fig. 3 Chemical composition of magnesiochromite from the Vourinos chromitites in terms of Cr# [Cr/(Cr + Al)] versus Mg# [Mg/(Mg + Fe 2+ )]. Magnesiochromite compositions from the northern (A) and southern (B) Vourinos chromitites.

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