FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3033342801> ?p ?o ?g. }

• W3033342801 abstract "Abstract The supracrustal metamorphic rocks of the Dora-Maira Massif, western Alps, have been intensively studied. Certain ultra-high-pressure lithologies contain coesite and nearly end-member composition pyrope, Mg 3 Al 2 Si 3 O 12 , making this locality petrologically and mineralogically unique. Structural OH - , loosely termed “water”, in pyrope crystals of different composition has been investigated numerous times, using different experimental techniques, by various researchers. However, it is not clear where the minor OH - is located in them. IR single-crystal spectra of two pyropes of composition {Mg 2.79 ,Fe 2+ 0.15 ,Ca 0.04 } Σ2.98 [Al] 2.02 (Si) 2.99 O 12 and {Mg 2.90 ,Fe 2+ 0.04 ,Ca 0.02 } Σ2.96 [Al] 2.03 (Si) 3 O 12 were recorded at room temperature (RT) and 80 K. The spectra show five distinct OH - bands located above 3600 cm -1 at RT and seven narrow bands at 80 K and additional fine structure. The spectra were curve fit and the OH - stretching modes analyzed and assigned. It is argued that OH - is located in microscopic- and nano-size Ca 3 Al 2 H 12 O 12 -like clusters. The basic substitution mechanism is the hydrogarnet one, where (H 4 O 4 ) 4- ⇔ (SiO 4 ) 4- , and various local configurations containing different numbers of (H 4 O 4 ) 4- groups define the cluster type. The amounts of H 2 O range between 5 and 100 ppm by weight, depending on the IR calibration adopted, and are variable among crystals. Hydrogrossular-like clusters are also present in a synthetic pyrope with a minor Ca content grown hydrothermally at 900 °C and 20 kbar, as based on its IR spectra at RT and 80 K. Experiment and nature are in agreement, and OH - groups are partitioned into various barely nano-size hydrogrossular-like clusters. This proposal is new and significant mineralogical, petrological, and geochemical implications result. Ca and proton ordering occur. Hypothetical “defect” and/or coupled-substitution mechanisms to account for structural OH - are not needed to interpret experimental results. OH - incorporation in pyrope of different generations at Dora-Maira is discussed and OH - could potentially be used as an indicator of changing $$ P_{{{text{H}}_{{text{2}}} {text{O}}}} {text{(}}a_{{{text{H}}_{{text{2}}} {text{O}}}} {text{) - }}T $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:msub> <mml:mi>P</mml:mi> <mml:mrow> <mml:msub> <mml:mtext>H</mml:mtext> <mml:mtext>2</mml:mtext> </mml:msub> <mml:mtext>O</mml:mtext> </mml:mrow> </mml:msub> <mml:mtext>(</mml:mtext> <mml:msub> <mml:mi>a</mml:mi> <mml:mrow> <mml:msub> <mml:mtext>H</mml:mtext> <mml:mtext>2</mml:mtext> </mml:msub> <mml:mtext>O</mml:mtext> </mml:mrow> </mml:msub> <mml:mrow> <mml:mtext>) -</mml:mtext> <mml:mspace /> </mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> </mml:math> conditions in a metamorphic cycle. Published experimental hydration, dehydroxylation, and hydrogen diffusion results on Dora-Maira pyropes can now be interpreted atomistically." @default.
• W3033342801 created "2020-06-12" @default.
• W3033342801 creator A5002489307 @default.
• W3033342801 creator A5059565203 @default.
• W3033342801 date "2020-06-01" @default.
• W3033342801 modified "2023-10-15" @default.
• W3033342801 title "Micro- and nano-size hydrogrossular-like clusters in pyrope crystals from ultra-high-pressure rocks of the Dora-Maira Massif, western Alps" @default.
• W3033342801 cites W1558708337 @default.
• W3033342801 cites W1631490981 @default.
• W3033342801 cites W1775042965 @default.
• W3033342801 cites W1966519298 @default.
• W3033342801 cites W1974199039 @default.
• W3033342801 cites W1980313149 @default.
• W3033342801 cites W1981238025 @default.
• W3033342801 cites W1984162904 @default.
• W3033342801 cites W1984684994 @default.
• W3033342801 cites W1987298806 @default.
• W3033342801 cites W1993790463 @default.
• W3033342801 cites W1998280235 @default.
• W3033342801 cites W1998463239 @default.
• W3033342801 cites W2000995611 @default.
• W3033342801 cites W2002018617 @default.
• W3033342801 cites W2022159916 @default.
• W3033342801 cites W2022761178 @default.
• W3033342801 cites W2024086248 @default.
• W3033342801 cites W2025253988 @default.
• W3033342801 cites W2030974263 @default.
• W3033342801 cites W2032362280 @default.
• W3033342801 cites W2033059144 @default.
• W3033342801 cites W2034564739 @default.
• W3033342801 cites W2035492639 @default.
• W3033342801 cites W2038244460 @default.
• W3033342801 cites W2042774022 @default.
• W3033342801 cites W2046166481 @default.
• W3033342801 cites W2047230097 @default.
• W3033342801 cites W2049412514 @default.
• W3033342801 cites W2059539080 @default.
• W3033342801 cites W2064317357 @default.
• W3033342801 cites W2065207392 @default.
• W3033342801 cites W2065703698 @default.
• W3033342801 cites W2067290481 @default.
• W3033342801 cites W2069006769 @default.
• W3033342801 cites W2074161360 @default.
• W3033342801 cites W2082930482 @default.
• W3033342801 cites W2084189249 @default.
• W3033342801 cites W2084284202 @default.
• W3033342801 cites W2110305278 @default.
• W3033342801 cites W2131035464 @default.
• W3033342801 cites W2142682716 @default.
• W3033342801 cites W2268825755 @default.
• W3033342801 cites W2286819678 @default.
• W3033342801 cites W2316306795 @default.
• W3033342801 cites W2318909754 @default.
• W3033342801 cites W2322140977 @default.
• W3033342801 cites W2326746816 @default.
• W3033342801 cites W2328441318 @default.
• W3033342801 cites W2329545962 @default.
• W3033342801 cites W2331379923 @default.
• W3033342801 cites W2340955161 @default.
• W3033342801 cites W2464794336 @default.
• W3033342801 cites W2523774427 @default.
• W3033342801 cites W2756416633 @default.
• W3033342801 cites W2790068676 @default.
• W3033342801 cites W2791514665 @default.
• W3033342801 cites W2795831912 @default.
• W3033342801 cites W2800279568 @default.
• W3033342801 cites W2887559668 @default.
• W3033342801 cites W2897257240 @default.
• W3033342801 cites W2979369514 @default.
• W3033342801 cites W2979734767 @default.
• W3033342801 cites W2990075592 @default.
• W3033342801 cites W3014471387 @default.
• W3033342801 cites W3015092490 @default.
• W3033342801 cites W3093703950 @default.
• W3033342801 doi "https://doi.org/10.1007/s00410-020-01693-1" @default.
• W3033342801 hasPublicationYear "2020" @default.
• W3033342801 type Work @default.
• W3033342801 sameAs 3033342801 @default.
• W3033342801 citedByCount "3" @default.
• W3033342801 countsByYear W30333428012021 @default.
• W3033342801 countsByYear W30333428012022 @default.
• W3033342801 crossrefType "journal-article" @default.
• W3033342801 hasAuthorship W3033342801A5002489307 @default.
• W3033342801 hasAuthorship W3033342801A5059565203 @default.
• W3033342801 hasBestOaLocation W30333428011 @default.
• W3033342801 hasConcept C113196181 @default.
• W3033342801 hasConcept C121332964 @default.
• W3033342801 hasConcept C127313418 @default.
• W3033342801 hasConcept C1276947 @default.
• W3033342801 hasConcept C151730666 @default.
• W3033342801 hasConcept C160776313 @default.
• W3033342801 hasConcept C173347748 @default.
• W3033342801 hasConcept C17409809 @default.
• W3033342801 hasConcept C185592680 @default.
• W3033342801 hasConcept C199289684 @default.
• W3033342801 hasConcept C26687426 @default.
• W3033342801 hasConcept C2775974874 @default.
• W3033342801 hasConcept C43617362 @default.
• W3033342801 hasConcept C4839761 @default.
• W3033342801 hasConcept C58097730 @default.

• next