The ambient ammonia synthesis coupled with distributed green hydrogen production technology can provide promising solutions for low-carbon NH 3 production and H 2 storage. Herein, we reported Ru-loaded defective pyrochlore K 2 Ta 2 O 6−x with remarkable visible-light absorption and a very low work function, enabling effective visible-light-driven …
Here we demonstrate that a pyrochlore, which is considered to be defect fluorite, is the result of intricate disorder due to a random distribution of fully ordered nano-domains. Our investigation ...
Эрүүгийн хэрэг үүсгэж яллагдагчаар татах тогтоол үйлдсэнээс хэргийг шүүхэд шилжүүлэх хүртэл хэргийн талаар нотлогдвол зохих байдлыг тогтоох зорилгоор явуулж байгаа энэ хуульд заасан ажиллагааг мөрдөн байцаалт ...
Recently, the three-dimensional Ce3+ pyrochlore lattice Ce2Sn2O7 has been suggested as a clean, effective spin-1/2 quantum spin liquid candidate, but evidence of a spin excitation continuum is ...
pyrochlore: [noun] a brown or dark reddish mineral NaCaCb2O6F that is isomorphous with microlite and is an oxide and fluoride of sodium, calcium, and columbium.
The general formula of the pyrochlore-supergroup minerals is A2B2X6Y. The mineral names are composed of two prefixes and one root name (identical to the name of the group). The first prefix refers to the dominant anion (or cation or H2O or vacancy) of the dominant valence at the Y-site. The second prefix refers to the dominant cation of the …
Pyrochlore is the most important group of the pyrochlore-supergroup minerals and constitutes the main Nb ore in the carbonatite deposits of the Late Cretaceous Alto Paranaíba Igneous Province (APIP), central Brazil (Cordeiro et al., 2011).The APIP alkaline-carbonatite complexes (Fig. 1 b), including the Araxá carbonatite complex …
In this article we provide some perspectives on a range of pyrochlore and defect fluorite type compounds with nominal A2B2O7, A2BO5, ABC2O7, and other stoichiometries. …
Ca 2 Nb 2 O 6 F ( download cif) is the nominal pyrochlore mineral. The general formula for Pyrochlore is A 2 B 2 O 7, or more accurately: A 2 B 2 O 6 O'. In the case of nominal pyrochlore, F occupies the F' site. …
The pyrochlore-group minerals crystallized from two or more carbonatitic magmas, enriched in Nb, Ti, LREE, U, and Th. The calcite carbonatites of the NIOCAN and Bond Zone areas are hybrid rocks. No simple hypothesis can be devised to explain the significant concentrations of pyrochlore in particular samples of host rock. Enrichment in …
Хуваалцах. Сангийн сайдын 2017 оны 07 сарын 04-ний өдрийн 234 тоот тушаалын хавсралт. ЕРӨНХИЙ ГЭРЭЭ БАЙГУУЛАХ ЖУРАМ. Нэг. Нийтлэг үндэслэл. 1.1. Энэхүү журмын зорилго нь Төрийн болон орон нутгийн ...
A new scheme of nomenclature for the pyrochlore supergroup, approved by the CNMNC–IMA, is based on the ions at the A, B and Y sites. What has been referred to until now as the pyrochlore group should be referred to as the pyrochlore supergroup, and the subgroups should be changed to groups. Five groups are recommended, based on …
Pyrochlore-group minerals are relatively common accessory constituents of calcite carbonatite at the Oka Carbonatite Complex, Quebec. This complex is a member of the Cretaceous Monteregian ...
Section snippets Design of multicomponent pyrochlore solid solutions. Five lanthanide oxides (Sm 2 O 3, Gd 2 O 3, Dy 2 O 3, Er 2 O 3 and Yb 2 O 3) were selected as starting materials to prepare single component and multicomponent pyrochlore solid solutions across the rare-earth element series.By selecting …
Шүүгчид хэрэг хувиарлах журам 2022/02/14 Хан-Уул дүүргийн Эрүүгийн хэргийн анхан шатны шүүхийн П.Өсөхбаярт холбогдох "ЗАЛИЛАХ" гэмт хэргийн шүүх хуралдаан 2021 оны 9 дүгээр сарын 14-ний өдрийн 09 ...
The Rietveld refinements in Table 2 also validate that the pyrochlore phase is complete, signifying the successful synthesis of single pyrochlore ceramics. In addition, the positions of oxygen 48 f(x, 1/8, 1/8) of above four oxides are around 0.33, which also demonstrates that the four oxides are order pyrochlore structure [16], [17], [32] .
Abstract. The Coulomb phase is an idealized state of matter whose properties are determined by factors beyond conventional considerations of symmetry, including global topology, conservation laws ...
Abstract. The IMA Subcommittee on Nomenclature of the Pyrochlore Group recommends the following classification and nomenclature: pyrochlore, kalipyrochlore, …
For pyrochlore materials in particular, structural disorder increases catalytic activity in Li–O 2 batteries 15, increases ionic conductivity to levels comparable to yttria-stabilized zirconia 8
PDF | A new scheme of nomenclature for the pyrochlore supergroup, approved by the CNMNC–IMA, is based on the ions at the A, B and Y sites. What has …
The Ksp of pyrochlore increases strongly with increasing temperature and with decreasing A/CNK (molar Al 2 O 3 /CaO+Na 2 O+K 2 O). By contrast, the Ksp of pyrochlore is only weakly dependent on the F content of the melt, if F concentrations are greater than 1 wt %. The Ksp values of pyrochlore from this study are compared to those …
Mineral Group: Pyrochlore group and subgroup; (Na + Ca)A >20%; (Nb + Ta)B >2TiB; NbB >TaB. Occurrence: In pegmatites in nepheline syenites and other alkalic rocks; in granite pegmatites and greisens; characteristic in carbonatites; detrital. Association: Zircon, aegirine, apatite, perovskite, columbite. Distribution: Numerous localities.
Хүнсний үйлдвэрийн салбарын бодлого 1. Салбарын урт хугацааны зорилт УИХ-ын 2016 оны 19 дүгээр тогтоолоор батлагдсан Монгол Улсын тогтвортой хөгжлийн үзэл баримтлал 2030-ын "Эдийн засгийн тогтвортой хөгжил" бүлгийн Аж ...
3.1.Зөвлөх үйлчилгээ үзүүлэх иргэн дараахь шаардлагыг хангасан байна: 3.1.1.Зөвлөх үйлчилгээ үзүүлэх чиглэлд хамаарах энэ журмын 1 дүгээр хавсралтад заасан ажлын хүрээнд хамаарах мэргэжилтэй ...
ЖУРАМ, ХҮСНЭГТ БАТЛАХ ТУХАЙ /Гэмт хэргийн улмаас хүний сэтгэцэд учирсан хор уршгийн зэрэглэлийг тогтоож, дүгнэлт гаргах журам", "Тухайлсан гэмт хэргийн улмаас хүний сэтгэцэд учирсан хор уршгийн зэрэглэлийг тогтоох ...
18 Citations. Explore all metrics. Abstract. A systematic and rational nomenclature of minerals of the pyrochlore group are developed based on the results …
In this field, understanding the role of electronic structure of catalysts on catalytic activity is essential but still lacking. Herein, a family of pyrochlore oxides R 2 Ir 2 O 7 (R = rare earth ions) is reported as acidic oxygen-evolving catalysts with superior-specific activities. More importantly, it is found that the intrinsic activity of ...