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eskolaite

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Journal Article
Published: 01 June 2023
American Mineralogist (2023) 108 (6): 1109–1116.
...) and the generalized gradient approximation]. This approach was used to determine the effect of magnetic contributions to corundum-eskolaite and corundum-hematite phase equilibria from first principles. Two-component cluster expansions of the magnetic components of eskolaite and hematite were first performed showing...
FIGURES | View All (6)
Journal Article
Published: 01 November 2019
Russ. Geol. Geophys. (2019) 60 (11): 1229–1246.
...L.Z. Reznitsky; E.V. Sklyarov; L.F. Suvorova; I.G. Barash Abstract —A continuous solid-solution series between the end-members eskolaite (98 wt.% Cr 2 O 3 ) and karelianite (93 wt.% V 2 O 3 ) has been revealed in Cr–V-bearing rocks of the Slyudyanka metamorphic complex. Chromium and vanadium oxides...
FIGURES | View All (13)
Journal Article
Published: 01 October 2012
American Mineralogist (2012) 97 (10): 1764–1770.
... the uncertainty of measurements and can be perfectly described by the linear Birch-Murnaghan third-order equations ( Poirier 2000 ). Figure 2 A reconstruction of the h 0 l reciprocal space section for Cr 2 O 3 measured at 70.4(5) GPa. Figure 3 Compressibility of eskolaite Cr 2 O 3 . The data...
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Journal Article
Published: 01 June 2008
Mineralogical Magazine (2008) 72 (3): 785–792.
...L. Secco; F. Nestola; A. Dal Negro; L. Z. Reznitsky Abstract Six natural crystals from the Sludyanka crystalline complex belonging to the eskolaite (Cr 2 O 3 )–karelianite (V 2 O 3 )–hematite (Fe 2 O 3 ) solid solution were studied by means of X-ray diffraction and electron microprobe. The Fe 3...
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Journal Article
Published: 01 April 2008
American Mineralogist (2008) 93 (4): 685–690.
...Alla M. Logvinova; Richard Wirth; Nikolai V. Sobolev; Yuri V. Seryotkin; Emiliya S. Yefimova; Christine Floss; Lawrence A. Taylor Abstract The mineral eskolaite (Cr 2 O 3 ) has been discovered in association with natural diamond from the Udachnaya pipe in Yakutia, where it is intergrown...
FIGURES
Journal Article
Published: 01 August 1982
American Mineralogist (1982) 67 (7-8): 725–735.
...Niranjan D. Chatterjee; Hans Leistner; Ludger Terhart; Kurt Abraham; Rolf Klaska Abstract Corundum–eskolaite, α –(Al,Cr) 2 O 3 , crystalline solutions with compositions in the range O < X Cr 2 O 3 < 1 have been synthesized at 25 kbar P H 2 O and 1070° C. Homogeneity of the crystals...
Journal Article
Published: 01 August 1961
American Mineralogist (1961) 46 (7-8): 998–1000.
...Christel Tennyson Abstract Kouvo & Vuorelainen* described in 1958 the new mineral eskolaite, natural Cr 2 O 3 isotype with Al 2 O 3 and Fe 2 O 3 , forming idiomorphic crystals up to about 5 mm. in size, from Outokumpu, Finland. The authors mention that the prismatic or platy crystals show...
Journal Article
Published: 01 December 1958
American Mineralogist (1958) 43 (11-12): 1098–1106.
Journal Article
Published: 01 December 1958
American Mineralogist (1958) 43 (11-12): 1203.
...Charles Milton; Edward C. T. Chao Abstract The account by Kuovo and Vuorelainen on page 1098 of this issue of the discovery in Finland of eskolaite, chromic oxide, makes it of interest to report that the same mineral is a major constituent of black pebbles found in the bed of the Merume River...
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Backscattered electron (BSE) images of Cr-oxide minerals from the Matoush d...
Published: 01 February 2014
Fig. 3 Backscattered electron (BSE) images of Cr-oxide minerals from the Matoush deposit. (A) A typical mineral assemblage of alternating botryoidal bands of eskolaite (E) and hydrated eskolaite (E H ) cross-cutting chromium-dravite (Cr-Dr); (B) assemblage of alternating botryoidal bands
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High magnification BSE images of Cr oxides, showing their chemical zonation...
Published: 01 February 2014
Fig. 5 High magnification BSE images of Cr oxides, showing their chemical zonation. The black colored mineral corresponds to chromium-dravite, the dark grey mineral is hydrated eskolaite, the light grey mineral is eskolaite, and the white mineral is uraninite. Note the euhedral outline
Image
Karelianite–<span class="search-highlight">eskolaite</span> inclusions in kalininite–florensovite ( A ) and a sul...
Published: 01 November 2019
Fig. 9. Karelianite–eskolaite inclusions in kalininite–florensovite ( A ) and a sulfospinel margin around a karelianite–eskolaite inclusion in pyroxene ( B ). BSE image. Cpx, pyroxene; Ka, kalininite–florensovite; Esk, eskolaite–karelianite.
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Correlated distribution of Cr and V in diopside and karelianite–<span class="search-highlight">eskolaite</span> i...
Published: 01 November 2019
Fig. 6. Correlated distribution of Cr and V in diopside and karelianite–eskolaite inclusions. A , markedly decreasing Cr content in pyroxene; V is relatively high throughout the pyroxene grain and is slightly lower near a karelianite–eskolaite inclusion and in its margin; B , uneven
Journal Article
Published: 01 February 2014
The Canadian Mineralogist (2014) 52 (1): 61–75.
...Fig. 3 Backscattered electron (BSE) images of Cr-oxide minerals from the Matoush deposit. (A) A typical mineral assemblage of alternating botryoidal bands of eskolaite (E) and hydrated eskolaite (E H ) cross-cutting chromium-dravite (Cr-Dr); (B) assemblage of alternating botryoidal bands...
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( a ) Back-scattered-electron (BSE) image of an <span class="search-highlight">eskolaite</span> (Esk) fragment, c...
Published: 01 April 2008
F igure 1. ( a ) Back-scattered-electron (BSE) image of an eskolaite (Esk) fragment, containing a small picrochromite (Chr) inclusion, in a polished epoxy mount; the rectangle indicates the location where the TEM foil TEM was cut away permitting the TEM imaging; ( b) energy-filtered lattice
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SEM images of experimental products. ( a ) G9 from  q  = 1.00 starting mate...
Published: 01 October 2009
F igure 2. SEM images of experimental products. ( a ) G9 from q = 1.00 starting material showing prismatic Cr-bearing clinozoisite and eskolaite crystals (white spots) and ( b ) G33 from q = 0.25 starting material showing euhedral zoisite and clinozoisite crystals and trace amounts
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Effective cluster interactions of <span class="search-highlight">eskolaite</span> and hematite. (Color online.)
Published: 01 June 2023
Figure 2. Effective cluster interactions of eskolaite and hematite. (Color online.)
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Distribution of Cr and Al between spinel and <span class="search-highlight">eskolaite</span> as a function of Cr&#x2F;...
Published: 01 November 2003
Fig. 7. Distribution of Cr and Al between spinel and eskolaite as a function of Cr/(Cr + Al) in corundum-eskolaite solid solution. Unfilled triangles are experimental data of Oka et al. (1982) for 2.5 GPa and 800–1250°C. Filled squares with error bars and arrows show equilibrium and half
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Distribution of Cr, V and related Mg and Ca in diopside around karelianite–...
Published: 01 November 2019
Fig. 5. Distribution of Cr, V and related Mg and Ca in diopside around karelianite–eskolaite inclusions. A , markedly low Cr and V contents around a cluster of newly formed crystals, behind the zone of karelianite–eskolaite microinclusions; B , Cr content decreasing markedly (to 0.0n%) away
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X-ray diffraction pattern of a sample containing dravite, uraninite, and es...
Published: 01 February 2014
Fig. 7 X-ray diffraction pattern of a sample containing dravite, uraninite, and eskolaite mixture from the ore zone at the Matoush deposit. The uraninite (U) and eskolaite (E) peaks are labelled; all remaining peaks correspond to dravite. The expanded portion of the diffraction data shows