FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1773004530> ?p ?o ?g. }

• W1773004530 endingPage "351" @default.
• W1773004530 startingPage "340" @default.
• W1773004530 abstract "Ten type I diamonds containing CO2 and three diamonds related to these (referred to as “Pseudo CO2” diamonds) were treated by the HPHT process to observe changes in colour, colour distribution, inclusions, luminescence and spectral features in the visible to the mid-infrared regions. All samples were of predominantly brown colour before the treatment and had rather inhomogeneous colour distribution not related to strain like in classic type Ia brown diamonds. Upon HPHT treatment most of them changed to a more yellow hue, with a greenish modifying colour, but the dominant colour was still brown. The modification of colour was found to be much more discreet than it is the case for deformation-related type Ia brown diamond and the colour was not at all related to known centers such as H3. The colour modifications were caused by the destruction of broad absorption bands in the Vis–NIR spectrum by the HPHT process and generally increased transmission from 400 to 700 nm, likely related to a slight increase in single nitrogen, but no typical HPHT annealing related colour centers such as H3 and H2 were produced in the spectra of the samples. This could be confirmed by the luminescence when excited by shortwave and longwave UV light, under which all samples showed a yellow emission that was practically not modified by the treatment. The infrared spectra of the 10 CO2 diamonds, defined by the presence of at least the CO2 stretching (ν3) and bending (ν2) absorptions, were unusually modified by the HPHT treatment: the treatment caused the CO2 bands to increase in intensity in diamonds with low to medium CO2 content, and the apparently diminished the intensity of the nitrogen-related one phonon absorptions (when present). In the spectra of the three “Pseudo CO2” samples, which lack by definition the CO2 peaks, the CO2 peaks were created and the one phonon absorption reduced by the treatment. The photoluminescence spectra exhibiting several unpublished emission peaks remained practically unchanged by HPHT processing: none of the emissions were annealed out and no new centers created. The data obtained by HPHT treatment leads us to propose, that the theory of solid CO2 inclusions being responsible for the CO2 absorptions in diamond may be erroneous, and that the CO2 may be present structurally. Thus it is proposed that structurally bonded oxygen may play an important role in such diamonds. The present study indicates that treated CO2 and “Pseudo CO2” diamonds can in most cases not be identified by the methods available in well-equipped gemmological laboratories, since no detectable defect centers appear to be induced by the treatment." @default.
• W1773004530 created "2016-06-24" @default.
• W1773004530 creator A5001593712 @default.
• W1773004530 creator A5007646026 @default.
• W1773004530 creator A5023714850 @default.
• W1773004530 creator A5047666524 @default.
• W1773004530 creator A5083870151 @default.
• W1773004530 creator A5086231082 @default.
• W1773004530 creator A5089628117 @default.
• W1773004530 date "2008-03-01" @default.
• W1773004530 modified "2023-10-05" @default.
• W1773004530 title "HPHT treatment of CO2 containing and CO2-related brown diamonds" @default.
• W1773004530 cites W1985488335 @default.
• W1773004530 cites W1986339882 @default.
• W1773004530 cites W1989820781 @default.
• W1773004530 cites W1993462217 @default.
• W1773004530 cites W2005592125 @default.
• W1773004530 cites W2017200647 @default.
• W1773004530 cites W2029705244 @default.
• W1773004530 cites W2035785959 @default.
• W1773004530 cites W2039106505 @default.
• W1773004530 cites W2041086592 @default.
• W1773004530 cites W2091413308 @default.
• W1773004530 cites W2105256959 @default.
• W1773004530 cites W2146806459 @default.
• W1773004530 cites W2332029983 @default.
• W1773004530 doi "https://doi.org/10.1016/j.diamond.2008.01.022" @default.
• W1773004530 hasPublicationYear "2008" @default.
• W1773004530 type Work @default.
• W1773004530 sameAs 1773004530 @default.
• W1773004530 citedByCount "22" @default.
• W1773004530 countsByYear W17730045302013 @default.
• W1773004530 countsByYear W17730045302014 @default.
• W1773004530 countsByYear W17730045302015 @default.
• W1773004530 countsByYear W17730045302016 @default.
• W1773004530 countsByYear W17730045302019 @default.
• W1773004530 countsByYear W17730045302020 @default.
• W1773004530 countsByYear W17730045302021 @default.
• W1773004530 countsByYear W17730045302022 @default.
• W1773004530 countsByYear W17730045302023 @default.
• W1773004530 crossrefType "journal-article" @default.
• W1773004530 hasAuthorship W1773004530A5001593712 @default.
• W1773004530 hasAuthorship W1773004530A5007646026 @default.
• W1773004530 hasAuthorship W1773004530A5023714850 @default.
• W1773004530 hasAuthorship W1773004530A5047666524 @default.
• W1773004530 hasAuthorship W1773004530A5083870151 @default.
• W1773004530 hasAuthorship W1773004530A5086231082 @default.
• W1773004530 hasAuthorship W1773004530A5089628117 @default.
• W1773004530 hasConcept C104663316 @default.
• W1773004530 hasConcept C107872376 @default.
• W1773004530 hasConcept C113196181 @default.
• W1773004530 hasConcept C120665830 @default.
• W1773004530 hasConcept C121332964 @default.
• W1773004530 hasConcept C1276947 @default.
• W1773004530 hasConcept C148869448 @default.
• W1773004530 hasConcept C158355884 @default.
• W1773004530 hasConcept C159985019 @default.
• W1773004530 hasConcept C185592680 @default.
• W1773004530 hasConcept C192562407 @default.
• W1773004530 hasConcept C199289684 @default.
• W1773004530 hasConcept C2776921476 @default.
• W1773004530 hasConcept C2777855556 @default.
• W1773004530 hasConcept C4839761 @default.
• W1773004530 hasConcept C49040817 @default.
• W1773004530 hasConceptScore W1773004530C104663316 @default.
• W1773004530 hasConceptScore W1773004530C107872376 @default.
• W1773004530 hasConceptScore W1773004530C113196181 @default.
• W1773004530 hasConceptScore W1773004530C120665830 @default.
• W1773004530 hasConceptScore W1773004530C121332964 @default.
• W1773004530 hasConceptScore W1773004530C1276947 @default.
• W1773004530 hasConceptScore W1773004530C148869448 @default.
• W1773004530 hasConceptScore W1773004530C158355884 @default.
• W1773004530 hasConceptScore W1773004530C159985019 @default.
• W1773004530 hasConceptScore W1773004530C185592680 @default.
• W1773004530 hasConceptScore W1773004530C192562407 @default.
• W1773004530 hasConceptScore W1773004530C199289684 @default.
• W1773004530 hasConceptScore W1773004530C2776921476 @default.
• W1773004530 hasConceptScore W1773004530C2777855556 @default.
• W1773004530 hasConceptScore W1773004530C4839761 @default.
• W1773004530 hasConceptScore W1773004530C49040817 @default.
• W1773004530 hasIssue "3" @default.
• W1773004530 hasLocation W17730045301 @default.
• W1773004530 hasLocation W17730045302 @default.
• W1773004530 hasLocation W17730045303 @default.
• W1773004530 hasLocation W17730045304 @default.
• W1773004530 hasLocation W17730045305 @default.
• W1773004530 hasOpenAccess W1773004530 @default.
• W1773004530 hasPrimaryLocation W17730045301 @default.
• W1773004530 hasRelatedWork W1973061813 @default.
• W1773004530 hasRelatedWork W2034433750 @default.
• W1773004530 hasRelatedWork W2055808406 @default.
• W1773004530 hasRelatedWork W2083009587 @default.
• W1773004530 hasRelatedWork W2090518078 @default.
• W1773004530 hasRelatedWork W2349129009 @default.
• W1773004530 hasRelatedWork W2371413910 @default.
• W1773004530 hasRelatedWork W2570109689 @default.
• W1773004530 hasRelatedWork W2899084033 @default.
• W1773004530 hasRelatedWork W4205510562 @default.

• next