Journal ArticleDOI
Crystallization of diamond from C-O-H fluids under high-pressure and high-temperature conditions
Minoru Akaishi,Shinobu Yamaoka +1 more
TLDR
In this paper, small diamond crystals were crystallized from the starting system of graphite and oxalic acid dihydrate, (COOH) 2 ·2H 2 O, at high pressure and high temperatures of 7.7 GPa and 1400-2000°C, respectively.About:
This article is published in Journal of Crystal Growth.The article was published on 2000-02-02. It has received 87 citations till now. The article focuses on the topics: Material properties of diamond & Diamond.read more
Citations
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Brine inclusions in diamonds: a new upper mantle fluid
TL;DR: The brine composition of cloudy diamonds from Koffiefontein consist of three main types: silicates, carbonates, and brine inclusions as mentioned in this paper, and the similarity of brine compositions in both environments may indicate that diamonds of both suites grew in a single event.
Journal ArticleDOI
Effect of Nitrogen Impurity on Diamond Crystal Growth Processes
Yuri N. Palyanov,Yuri N. Palyanov,Yuri M. Borzdov,Alexander F. Khokhryakov,Igor N. Kupriyanov,Alexander G. Sokol +5 more
TL;DR: In this article, the influence of nitrogen concentration in metal melts on the growth processes, morphology, and defect-and-impurity structure of diamond crystals was reported, and it was found that, with increasing nitrogen concentration (CN) in the metal melt from 0.005 to 0.6 atom %, the growth of single crystal diamond is followed by formation of aggregates of block twinned crystals and then by crystallization of metastable graphite.
Journal ArticleDOI
Fluid-bearing alkaline carbonate melts as the medium for the formation of diamonds in the Earth's mantle: an experimental study
TL;DR: In this article, the formation of diamonds in alkaline carbonate and carbonate-fluid-carbon systems at 5.7-7.0 GPa and 1150-1700 °C, using a split-sphere multi-anvil apparatus (BARS).
Journal ArticleDOI
Diamond formation through carbonate-silicate interaction
Yuri N. Palyanov,Alexander G. Sokol,Yuri M. Borzdov,Alexander F. Khokhryakov,Nikolay V. Sobolev +4 more
TL;DR: In a series of experiments, diamond was obtained in association with enstatite, coesite, and magnesite, as well as with forsterite, enstatitic, and Magnesite.
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Fluid and mineral inclusions in cloudy diamonds from Koffiefontein, South Africa
TL;DR: Izraeli et al. as mentioned in this paper detected silicates, carbonates and brine in microinclusions in cloudy diamonds from Koffiefontein, indicating that brine penetration into neighboring peridotitic and eclogitic rocks was pervasive.
References
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Journal ArticleDOI
Mantle-derived fluids in diamond micro-inclusions
TL;DR: Micro-inclusions in diamonds from Zaire and Botswana differ in composition from the more common large inclusions of the peridotitic or eclogitic assemblages as discussed by the authors.
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Preparation of Diamond
TL;DR: In this article, all the factors affecting diamonds were nicely accounted for and the formation of diamond was completely explained, but the work which has been carried out on this problem indicates that diamond can form in several different ways, and that stubborn mysteries still surround some of them.
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Diamond‐Graphite Equilibrium Line from Growth and Graphitization of Diamond
TL;DR: In this paper, the zones of pressure and temperature in which diamond growth occurs have been determined for a number of metals, and the experimentally determined equilibrium line agrees very closely with the theoretical extrapolation of the thermodynamically calculated line proposed by Berman and Simon.
Journal ArticleDOI
Evidence for a 150–200-km thick Archaean lithosphere from diamond inclusion thermobarometry
TL;DR: In this article, the authors used thermobarometry to find inclusions from diamonds that erupted in the Finsch kimberlite and Kimberley group, situated in the southern part of the Kaapvaal craton.
Journal ArticleDOI
Synthesis of diamond from graphite-carbonate system under very high temperature and pressure
TL;DR: In this article, high pressure experiments were carried out in the mixture of graphite and the carbonates of Li, Na, Mg, Ca and Sr. The results showed that diamond can be synthesized from graphite in the presence of these carbonates at high pressure and temperature of 7.7 GPa and 2150°C.
Related Papers (5)
Fluid-bearing alkaline carbonate melts as the medium for the formation of diamonds in the Earth's mantle: an experimental study
Hydrous and carbonatitic mantle fluids in fibrous diamonds from Jwaneng, Botswana
Marcus Schrauder,Oded Navon +1 more