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cuboid diamond

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Journal Article

Carbonatitic melts in cuboid diamonds from Udachnaya kimberlite pipe (Yakutia): evidence from vibrational spectroscopy Available to Purchase

D. A. Zedgenizov, H. Kagi, V. S. Shatsky, N. V. Sobolev
Published: 01 February 2004
Mineralogical Magazine (2004) 68 (1): 61–73.
DOI: https://doi.org/10.1180/0026461046810171
...D. A. Zedgenizov; H. Kagi; V. S. Shatsky; N. V. Sobolev Abstract Micro-inclusions (1–10 μm) in 55 diamonds of cubic habit from the Udachnaya kimberlite pipe have been studied using vibrational spectroscopy. This has revealed a multiphase assemblage in cuboid diamonds from the Udachnaya kimberlite...
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View PDF for article title, Carbonatitic melts in <span class="search-highlight">cuboid</span> <span class="search-highlight">diamonds</span> from Udachnaya kimberlite pipe (Yakutia): evidence from vibrational spectroscopy
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Journal Article

Evidence for ice VI as an inclusion in cuboid diamonds from high P-T near infrared spectroscopy Available to Purchase

H. Kagi, R. Lu, P. Davidson, A. F. Goncharov, H. K. Mao, R. J. Hemley
Published: 01 December 2000
Mineralogical Magazine (2000) 64 (6): 1089–1097.
...H. Kagi; R. Lu; P. Davidson; A. F. Goncharov; H. K. Mao; R. J. Hemley Abstract Near infrared absorption (NIR) spectra of natural morphologically cubic polycrystalline diamonds (cuboid) were obtained at room temperature, and the stretching plus bending combination band of molecular water...
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View PDF for article title, Evidence for ice VI as an inclusion in <span class="search-highlight">cuboid</span> <span class="search-highlight">diamonds</span> from high P-T near infrared spectroscopy
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Polished section of cuboid diamond from Udachnaya kimberlite pipe in transmitted light. Numerous micro-inclusions indicate the fibrous internal structure of the crystal.

Polished section of cuboid diamond from Udachnaya kimberlite pipe in transm... Available to Purchase

Published: 01 April 2006
F ig . 1. Polished section of cuboid diamond from Udachnaya kimberlite pipe in transmitted light. Numerous micro-inclusions indicate the fibrous internal structure of the crystal.
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Mid-IR absorption spectra of the cuboid diamond.

Mid-IR absorption spectra of the cuboid diamond. Available to Purchase

Published: 01 December 2000
F ig . 2. Mid-IR absorption spectra of the cuboid diamond.
Journal Article

Diamonds through Time Available to Purchase

J. J. Gurney, H. H. Helmstaedt, S. H. Richardson, S. B. Shirey
Journal: Economic Geology
Published: 01 May 2010
Economic Geology (2010) 105 (3): 689–712.
DOI: https://doi.org/10.2113/gsecongeo.105.3.689
... accretion, craton edge subduction, and magmatic mantle refertilization. Fibrous cuboid diamond and fibrous coats on SCD are rough-surfaced diamonds with abundant fluid inclusions. They have low mantle residence time, forming rapidly from late stage metasomatic fluids in diamond stable domains that may...
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View PDF for article title, <span class="search-highlight">Diamonds</span> through Time
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MIR spectra of cuboid diamonds: (a) sample from Zaire; (b) sample from Udachnaya pipe (Siberia). The IR spectra show features of diamond absorption, impurity defects (N, H), and minerals in inclusions. Water-related absorption is considerable.

MIR spectra of cuboid diamonds: ( a ) sample from Zaire; ( b ) sample from ... Available to Purchase

Published: 01 April 2006
F ig . 2. MIR spectra of cuboid diamonds: ( a ) sample from Zaire; ( b ) sample from Udachnaya pipe (Siberia). The IR spectra show features of diamond absorption, impurity defects (N, H), and minerals in inclusions. Water-related absorption is considerable.
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Cathodoluminesence images showing the growth patterns of cuboid alluvial diamonds from NE Siberia: (a) Dodecahedroid diamond with cuboid growth zones. (b) Rounded cuboid diamond with central cuboid domain. [Reprinted from Zedgenizov et al. (2016), with permission from Elsevier.]

Cathodoluminesence images showing the growth patterns of cuboid alluvial di... Open Access

Published: 01 July 2022
Figure 24. Cathodoluminesence images showing the growth patterns of cuboid alluvial diamonds from NE Siberia: ( a ) Dodecahedroid diamond with cuboid growth zones. ( b ) Rounded cuboid diamond with central cuboid domain. [Reprinted from Zedgenizov et al. (2016) , with permission from Elsevier.]
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Mid-IR spectra of cuboid diamonds: (a) sample UD-02-160 from Udachnaya pipe; (b) sample SL-3-9 from Snap Lake, Slave craton (for comparison). The IR spectra reflect all the species including diamond absorption and impurity defects such as nitrogen and hydrogen. For more details see the text.

Mid-IR spectra of cuboid diamonds: ( a ) sample UD-02-160 from Udachnaya pi... Available to Purchase

Published: 01 February 2004
F ig . 2. Mid-IR spectra of cuboid diamonds: ( a ) sample UD-02-160 from Udachnaya pipe; ( b ) sample SL-3-9 from Snap Lake, Slave craton (for comparison). The IR spectra reflect all the species including diamond absorption and impurity defects such as nitrogen and hydrogen. For more details see
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Micro-inclusions in cuboid diamonds from Udachnaya kimberlite pipe. (a) A polished section of sample Ud-02-107, showing zonal structure. Micro-inclusions trace the fibrous internal structure. (b) Higher magnification micrograph of sample Ud-02-107. Individual micro-inclusions reach several μm in size. Transmitted light.

Micro-inclusions in cuboid diamonds from Udachnaya kimberlite pipe. ( a ) A... Available to Purchase

Published: 01 February 2004
F ig . 1. Micro-inclusions in cuboid diamonds from Udachnaya kimberlite pipe. ( a ) A polished section of sample Ud-02-107, showing zonal structure. Micro-inclusions trace the fibrous internal structure. ( b ) Higher magnification micrograph of sample Ud-02-107. Individual micro-inclusions reach
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NIR absorption spectra of the cuboid diamonds obtained (a) at 120°C and (b) at room temperature. The combination band of molecular water was observed in both spectra. While the band shape of the combination mode appeared to be convex upward before heating, it changed to concave upward at 120°C as well as liquid water (Fig. 2a). The spectral change is denoted by the arrow. The difference spectrum between (a) and (b) is displayed in part (c).

NIR absorption spectra of the cuboid diamonds obtained ( a ) at 120°C and (... Available to Purchase

Published: 01 December 2000
F ig . 4. NIR absorption spectra of the cuboid diamonds obtained ( a ) at 120°C and ( b ) at room temperature. The combination band of molecular water was observed in both spectra. While the band shape of the combination mode appeared to be convex upward before heating, it changed to concave
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Secondary Electron Scanning Electron Microscope images of microdiamonds from Kokchetav massif, Kazakhstan (L. Dobrzhinetskaya’s collection). A–diamonds separated from garnet–biotite gneiss; B–platy skeletal-like diamond single crystal from quartzite; C–shapeless diamond crystal from metacarbonate rocks; D–polycrystalline diamond from marble; E–truncated corners cuboid-like diamond with graphite (black contrast) from garnet–biotite gneiss; F–cuboidal diamond with truncated corners—from garnet–biotite gneiss.

Secondary Electron Scanning Electron Microscope images of microdiamonds fro... Open Access

Published: 01 July 2022
from metacarbonate rocks; D –polycrystalline diamond from marble; E –truncated corners cuboid-like diamond with graphite ( black contrast ) from garnet–biotite gneiss; F –cuboidal diamond with truncated corners—from garnet–biotite gneiss.
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The relationship between the water content and concentration of CO2 (in carbonates) in micro-inclusions in cuboid diamonds from Udachnaya (1) and other localities (2). The material trapped in micro-inclusions in cuboids from Udachnaya has extreme carbonatitic compositions.

The relationship between the water content and concentration of CO 2 (in c... Available to Purchase

Published: 01 February 2004
F ig . 7. The relationship between the water content and concentration of CO 2 (in carbonates) in micro-inclusions in cuboid diamonds from Udachnaya (1) and other localities (2). The material trapped in micro-inclusions in cuboids from Udachnaya has extreme carbonatitic compositions.
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(a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territories, Canada. This selection illustrates the colorless octahedra (5), a deformed slightly brown octahedron, a coated stone, resorbed forms (2), irregular brown diamonds (2), and opaque fibrous cuboid diamonds (3). Sharp-edged, flat-faced unresorbed octahedra are a strong feature of Panda diamonds as shown in Figure 5. (b) Diamonds from the Misery kimberlite, Ekati, Northwest Territories, Canada. This selection illustrates the relatively high degree of resorption shown by most diamonds at the Misery location, with most diamonds being rounded tetrahexahedra, irrespective of color. Fibrous cuboid and coated stones are not represented at Misery. Diamond sizes in this figure range from ~0.5 to ~4 cts.

(a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territorie... Available to Purchase

Published: 01 May 2010
F ig . 6. (a) Diamonds from the Panda kimberlite, Ekati deposit, Northwest Territories, Canada. This selection illustrates the colorless octahedra (5), a deformed slightly brown octahedron, a coated stone, resorbed forms (2), irregular brown diamonds (2), and opaque fibrous cuboid diamonds (3
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(a,b) Absorption spectra of HOH-bending and OH-stretching vibrations in Siberian cuboid diamond at different temperatures.

( a , b ) Absorption spectra of HOH-bending and OH-stretching vibrations in... Available to Purchase

Published: 01 April 2006
F ig . 4. ( a , b ) Absorption spectra of HOH-bending and OH-stretching vibrations in Siberian cuboid diamond at different temperatures.
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Photomicrographs of polished slabs of microinclusion-bearing fibrous diamonds. (a) ‘fully fibrous’ cuboid diamond from Canada (exact mine is unknown). The concentric layers define variation in microinclusion-density from center to edge. In this specific diamond (and in most fibrous diamonds) the composition of the microinclusions is homogeneous and does not show chemical radial variation, indicating it formed in pulses, but during a single growth event. (b) ‘cloudy’ diamond from Finsch, South Africa (Weiss and Goldstein 2018); with a cuboid internal zone of fibrous growth that is full of microinclusions, overgrown by a clear octahedral outer zone. (c) ‘coated’ diamond from Kankan, Guinea (Weiss et al. 2009); consists of an octahedral non-fibrous monocrystalline (NFMC) core and a fibrous coat. In this diamond, the concentric layers in the coat are characterized by different microinclusion compositions (i.e., a zoned diamond). (d) high magnification image of the fibrous coat in (c), showing thousands of microinclusions (black dots). See section ‘Morphology and Texture’ and ‘Homogeneity and zoning in individual diamonds’ for additional details.

Photomicrographs of polished slabs of microinclusion-bearing fibrous diamon... Open Access

Published: 01 July 2022
Figure 1. Photomicrographs of polished slabs of microinclusion-bearing fibrous diamonds. ( a ) ‘fully fibrous’ cuboid diamond from Canada (exact mine is unknown). The concentric layers define variation in microinclusion-density from center to edge. In this specific diamond (and in most fibrous
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Compositions of carbonatite melt microinclusions in diamonds worldwide in comparison with the liquidus isotherms in the K2CO3-MgCO3-CaCO3 system at 6 GPa. SN94 = fibrous diamonds with cubic morphology from Jwaneng, Botswana (Schrauder and Navon 1994); W09 = coated octahedral diamonds from Kankan, Guinea (Weiss et al. 2009); T06 = coated octahedral diamonds from the Panda kimberlite, Canada (Tomlinson et al. 2006); Z07 = cuboid fibrous diamonds from the Udachnaya kimberlite, Russia (Zedgenizov et al. 2007); K09U, K09Z, K09Y, K09A = fibrous diamonds with cubic morphology from the Udachnaya, Zarnitsa, Yubileinaya, Aykhal kimberlite pipes, Russia (Klein-BenDavid et al. 2009); Z09 = cuboid diamonds with fibrous inner zone from Internationalnaya kimberlite, Russia (Zedgenizov et al. 2009); Z11 = fibrous diamonds with cubic and semirounded morphology from the Ebelyakh placers, northeastern Siberian Platform, Russia (Zedgenizov et al. 2011). Z = fibrous diamonds from Yubileinaya kimberlite, Russia (Zedgenizov et al., unpublished).

Compositions of carbonatite melt microinclusions in diamonds worldwide in c... Available to Purchase

Published: 01 February 2016
diamonds from Kankan, Guinea ( Weiss et al. 2009 ); T06 = coated octahedral diamonds from the Panda kimberlite, Canada ( Tomlinson et al. 2006 ); Z07 = cuboid fibrous diamonds from the Udachnaya kimberlite, Russia ( Zedgenizov et al. 2007 ); K09U, K09Z, K09Y, K09A = fibrous diamonds with cubic morphology
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The morphology of diamonds from alluvial placers in the northeastern Siberian platform: (a, b) diamond of octahedral habit (HI-48, group 1); (c, d) rounded diamond of rhombic dodecahedral habit (HI-145, group 1); (e, f) cuboid diamond with resorbed features (rounded edges, tetragonal etch pits) (HI-169, group 2); (g, h) diamond of variety V (19/1, group 3). (a, c, e, g) reflected light images; (b, d, f, h) SEM images.

The morphology of diamonds from alluvial placers in the northeastern Siberi... Available to Purchase

Published: 01 March 2014
Fig. 2 The morphology of diamonds from alluvial placers in the northeastern Siberian platform: (a, b) diamond of octahedral habit (HI-48, group 1 ); (c, d) rounded diamond of rhombic dodecahedral habit (HI-145, group 1 ); (e, f) cuboid diamond with resorbed features (rounded edges, tetragonal
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Examples of decomposition of HOH-bending and OH-stretching bands of cuboid diamonds (a,b – Ebelyakh (Siberia); c – Zaire). Two or three main components in the bending region and up to seven components were obtained from the least-squares fitting method.

Examples of decomposition of HOH-bending and OH-stretching bands of cuboid ... Available to Purchase

Published: 01 April 2006
F ig . 3. Examples of decomposition of HOH-bending and OH-stretching bands of cuboid diamonds ( a , b – Ebelyakh (Siberia); c – Zaire). Two or three main components in the bending region and up to seven components were obtained from the least-squares fitting method.
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Schematic phase diagram of water at high pressure (after Bridgman, 1935; Pistorius et al., 1963; Fei et al., 1993). The arrows show two possible heating sequences for natural cuboid diamond samples at the pressures estimated exclusively from the frequency of the combination band of water. Case I corresponds to the ice VI at 1.9 GPa and Case II corresponds to ice VII at 5 GPa.

Schematic phase diagram of water at high pressure (after Bridgman, 1935 ; ... Available to Purchase

Published: 01 December 2000
F ig . 1. Schematic phase diagram of water at high pressure (after Bridgman, 1935 ; Pistorius et al. , 1963 ; Fei et al. , 1993 ). The arrows show two possible heating sequences for natural cuboid diamond samples at the pressures estimated exclusively from the frequency of the combination
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Transmitted-light photomicrographs. (A) Elliptical, intergranular coesite (at arrow) surrounded by a rim of lower-relief quartz together with omphacite (blue) and garnet (orange), from an eclogite at Yangkou beach, Sulu terrane, China (from Liou et al. 2012). (B) High-relief, cuboid diamond crystals (center) hosted by clear garnet in a biotite (brown) paragneiss from the Kokchetav massif, Kazakhstan. Photos courtesy of Ru Yuan Zhang

Transmitted-light photomicrographs. ( A ) Elliptical, intergranular coesite... Available to Purchase

Published: 01 August 2013
, cuboid diamond crystals (center) hosted by clear garnet in a biotite (brown) paragneiss from the Kokchetav massif, Kazakhstan. P hotos courtesy of R u Y uan Z hang