Relevant bibliographies by topics / Alkali Aluminyls

Academic literature on the topic 'Alkali Aluminyls'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Alkali Aluminyls"

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Frost, Carol D., and Fabio A. Da Prat. "Petrogenetic and tectonic interpretation of strongly peraluminous granitic rocks and their significance in the Archean rock record." American Mineralogist 106, no. 8 (August 1, 2021): 1195–208. http://dx.doi.org/10.2138/am-2022-8001.

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Abstract Strongly peraluminous granitic rocks (SPG), defined by an aluminum saturation index ≥1.1, become abundant in the rock record in the Neoarchean. This study identifies three different varieties of Neoarchean SPG in the Archean Wyoming Province, U.S.A. These include calcic SPG, represented by the Webb Canyon Gneiss and Bitch Creek Gneiss of the Teton Range; calc-alkalic to alkali-calcic suites composed entirely of SPG, including the Rocky Ridge garnet granite gneiss of the northern Laramie Mountains and the Bear Mountain granite in the Black Hills; and calc-alkalic to alkali-calcic suites that include both weakly and strongly peraluminous granitic rocks, such as the Mount Owen batholith, Wyoming batholith, and Bears Ears granite. Although the petrogenesis of all the SPG suites involves partial melting of crustal sources, the composition of those sources, the melting conditions, and the tectonic settings vary. The calcic suites originate by dehydration melting or water excess melting of hornblende-plagioclase rocks at relatively high temperature. The suites composed entirely of SPG formed by partial melting of metasedimentary rocks by reactions involving muscovite at lower temperatures. Suites with both weakly and strongly peraluminous granite may form by partial melting of metasedimentary rocks by reactions involving biotite or by assimilation of aluminous melts of felsic crust by differentiated calc-alkalic magma. Most of the Wyoming SPG appear to have formed in collisional orogens, but SPG of the Wyoming batholith and Bears Ears granite are associated with continental arc magmatism. The appearance of SPG in the Neoarchean rock record marks the time when subduction enabled the formation of strong, thick, increasingly felsic continental crust, which in turn allowed the development of a mature, clastic sedimentary cover. Lateral movement of crustal blocks led to collisional orogeny, SPG magma genesis, and the formation of the first supercontinents.
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2

Gundusharma, U. M., and E. A. Secco. "New positive mixed alkali and mixed anion effects on fast Na+ ion conductivity in Na2SO4." Canadian Journal of Chemistry 65, no. 6 (June 1, 1987): 1205–8. http://dx.doi.org/10.1139/v87-202.

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The ac conductivity data for the binary alkali sulfate Rb+:Na2SO4 reveal a new positive mixed alkali effect in contrast to the so-called mixed alkali effect observed in β-aluminas. The binary alkali sulfate Rb+:Li2SO4 exhibits conductivity behavior intermediate between the two mixed alkali effects. A new positive mixed anion effect is also reported for the [Formula: see text] system. The higher Na+ conductivity in the Rb+:Na2SO4 and [Formula: see text] solid solutions is attributed to lattice expansion in a hexagonal structure effected by the larger radius isovalent guest ion and is interpreted in terms of a percolation type of transport mechanism.
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3

Zhang, Jie, Qiong Qiong Li, and Yu Qiang Xiong. "The Influence Factors of Compressive Strength and Production of Mineral Polymer of Aluminum Rocks in Xiuwen County, Guizhou Province, China." Advanced Materials Research 690-693 (May 2013): 1086–90. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1086.

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Aluminous rocks from Xiuwen County, Guizhou are the main raw materials, mixed some kaolin mineral. Water glass and alkaline activators are used to product polymer materials, the main experimental indicators are the compressive strength. Here, the studies on amount of water glass and alkaline activator, solid-liquid ratio, amount of kaolin and effects on compressive strength of Geopolymer have been proceeded respectively. The result shows that: the highest compressive strength of geopolymers is17.94 Mpa, with aluminous rock 40g, solid-liquid ratio 2.2, water glass12g and alkali activator 2.01g, as well as kaolin 18.02g.
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4

Yagüe Viana, Andrés, and Enric Vázquez Ramonich. "Carbonatación de morteros de cemento aluminoso en diversas condiciones de alcalinidad." Materiales de Construcción 45, no. 237 (March 30, 1995): 31–36. http://dx.doi.org/10.3989/mc.1995.v45.i237.566.

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5

Fernández-Carrasco, L., F. Puertas, M. T. Blanco-Varela, and T. Vázquez. "Nuevos avances en la carbonatación del cemento aluminoso. Hidrólisis alcalina." Materiales de Construcción 49, no. 253 (March 30, 1999): 47–55. http://dx.doi.org/10.3989/mc.1999.v49.i253.457.

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6

Feng, Xiao Xin, Yuan Jia, and Chen Guang Hu. "Effect of Admixtures Rich in Aluminium on Expansion due to Alkali-Silica Reaction." Applied Mechanics and Materials 268-270 (December 2012): 806–10. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.806.

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The effects of Al2O3 and Al(OH)3 on expansion due to alkali-silica reaction (ASR) were tested by using Accelerated Mortar Bar Test and through prolonging the curing age, and the ffect was compared with silicon fume and fly ash. The results show that ASR can be inhibited effectively by proper content of silicious admixtures within 14 days, but can not in long term, while it can be inhibited by proper content of Al2O3 and Al(OH)3 not only within 14 days but also in long term. The composite of silicious admixtures and aluminous admixtures has synergetic effect on inhibiting ASR, and there exists a value of Al2O3/SiO2 with which ASR is suppressed best. For the composite, ASR is suppressed mainly by silicious admixtures in early age and mainly by aluminous admixtures in long term.
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7

Aryanto, Noor C. D., and E. Suparka. "THE PETROLOGY CHARACTERISTIC OF GRANITOID ROCK BASED ON GEOCHEMICAL ANALYSIS OF BAJAU CAPE COAST AND ITS SURROUNDING, WEST KALIMANTAN." BULLETIN OF THE MARINE GEOLOGY 28, no. 1 (February 15, 2016): 13. http://dx.doi.org/10.32693/bomg.28.1.2013.51.

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The aim of this study is to identify of petrology characteristic based on geochemical analysis in order to know the granitoid rock type. Administratively, the study area is in the City and District of Singkawang, West Kalimantan Province, at coordinate 108°48'30” - 109°1'30” E and 0°40'30” - 0°54'30” N and, situated ± 145 km to the north of Pontianak City. The outcrop of granitoid along Bajau Cape coast and its surrounding, had been analyzed petrographically and geochemically using AAS method. Based on analysis of five samples show that the ratio mole of Al2O3/(CaO+Na2O +K2O) > 1 ranged between 1.12 and 1.7, while the rest of three samples are moderately aluminous, with a ratio value between 0.5 and 1.0. The ratio between K2O and (K2O+Na2O+CaO) ranges 0.07 to 0.55 (moderate) that forms alkali feldspar normative ranges from 3.8 to 15.89 wt%. This ratio shows that granite alkali feldspar is classified to be calc-alkaline series. Petrographically, this rock is porfiritic texture, hollocrystalline, granular hypodiomorphic and biotite present as phenocryst, yellowish brown, euhedral, thin and platy. The content of oxides element (Na2O and MgO) tend to decrease, whereas of other oxides elements, namely Al2O3, TiO2, K2O, FeO and CaO increased, parallel with the raising of SiO2. Therefore, the Singkawang Granitoid can be grouped as alkali feldspar granite, syeno-granite and quartz monzonite. Keywords: petrography, geochemstry, major elements, calc-alcaline affinity, granitoid type and Bajau Coast, West Kalimantan. Penelitian ini bertujuan untuk mengidentifikasi karakteristik petrologi, berdasarkan analisa geokimia sehingga jenis batuan granitoidnya dikenali. Secara administratif, daerah penelitian termasuk ke dalam Kota dan Kabupaten Singkawang, Provinsi Kalimantan Barat, pada koordinat 108°48'30” - 109°1'30” BT and 0°40'30” - 0°54'30” LU dan terletak ± 145 km, arah utara dari Kota Pontianak. Singkapan batuan granitoid sepanjang pantai Tanjung Bajau dan sekitarnya telah dianalisis secara petrografi dan geokimia dengan menggunakan AAS. Berdasarkan 5 contoh yang dianalisa menunjukan perbandingan mol Al2O3/(CaO+Na2O +K2O) > 1, yakni berkisar antara 1,12-1,7, sedangkan 3 contoh sisanya bersifat peraluminus sedang, dengan nilai ratio antara 0.5-1.0. Perbandingan antara K2O dan (K2O+Na2O+CaO) berkisar antara 0,07-0,55 (sedang) yang membentuk alkali normatif feldspar berkisar 3,84 – 15,89% (berat). Perbandingan tersebut menunjukan batuan Granit alkali feldspar yang tergolong dalam seri batuan kalk-alkali. Secara petrografi, batuan tersebut menunjukkan tekstur porfiritik, holokristalin, hipidiomorfik granular dengan biotit hadir sebagai fenokris, coklat kekuningan, euhedral, pipih dan sedikit berlembar. Kandungan unsur oksida (Na2O dan MgO) cenderung mengalami penurunan, sedangkan unsur oksida lainnya, yaitu Al2O3, TiO2, K2O, FeO dan CaO mengalami kenaikan sejalan dengan makin bertambahnya SiO2. Maka dengan demikian Granitoid Singkawang dapat dikelompokan menjadi granit alkali feldspar, syenit-granit dan kuarsa-monsonit. Kata kunci: Petrografi, geokimia, senyawa utama, afinitas kalk-alkalin, batuan granitoid dan Pantai Bajau, Kalimantan Barat.
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8

Tan, A. "Structural determinations in mixed-alkali, mixed phase (β,β″)-aluminas." Solid State Ionics 24, no. 2 (July 1987): 129–35. http://dx.doi.org/10.1016/0167-2738(87)90021-x.

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9

BELL, M., M. SAYER, and P. NICHOLSON. "Ion exchange of mixed alkali ion, mixed phase (β,β″) aluminas." Solid State Ionics 18-19 (January 1986): 672–76. http://dx.doi.org/10.1016/0167-2738(86)90240-7.

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10

Mikhailova, Julia A., Yakov A. Pakhomovsky, Natalia G. Konopleva, Andrey O. Kalashnikov, and Victor N. Yakovenchuk. "Fluorine Controls Mineral Assemblages of Alkaline Metasomatites." Minerals 12, no. 9 (August 25, 2022): 1076. http://dx.doi.org/10.3390/min12091076.

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In the Khibiny and Lovozero alkaline massifs, there are numerous xenoliths of the so-called ‘aluminous hornfelses’ composed of uncommon mineral associations, which, firstly, are ultra-aluminous, and secondly, are highly reduced. (K,Na)-feldspar, albite, hercynite, fayalite, minerals of the phlogopite-annite and cordierite-sekaninaite series, corundum, quartz, muscovite, sillimanite, and andalusite are rock-forming minerals. Fluorite, fluorapatite, ilmenite, pyrrhotite, ulvöspinel, troilite, and native iron are characteristic accessory minerals. The protolith of these rocks is unknown. We studied in detail the petrography, mineralogy, and chemical composition of these rocks and believe that hornfelses were formed as a result of the metasomatic influence of foidolites. The main reason for the formation of an unusual aluminous association is the high mobility of aluminum promoted by the formation of fluid expelled from foidolites of the Na-Al-OH-F complexes. Thus, it is fluorine that controls the mobility of aluminum in the fluid and, consequently, the mineral associations of alkaline metasomatites. The gain of alkalis and aluminum to rocks of protolith was the reason for the intense crystallization of (K,Na)-feldspar. As a result, a SiO2 deficiency was formed, and Si-poor, Al-rich silicates and/or oxides crystallized.
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Book chapters on the topic "Alkali Aluminyls"

1

"Behaviour of Aluminous Cement in Highly Alkaline Media." In Mechanisms of Chemical Degradation of Cement-based Systems, 284–92. CRC Press, 1997. http://dx.doi.org/10.1201/9781482294958-42.

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2

Kim, Il, and Dae-Won Park. "137 Ethylene polymerizations by zirconocarborane complex cocatalyzed by common alkyl aluminums." In Science and Technology in Catalysis 2002, Proceedings of the Fourth Tokyo conference on Advance Catalytic Science and Technology, 531–32. Elsevier, 2003. http://dx.doi.org/10.1016/s0167-2991(03)80294-x.

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Kim, Younghun, Changmook Kim, Jang Wook Choi, Pil Kim, and Jongheop Yi. "Synthesis of mesoporous γ-aluminas of controlled pore properties using alkyl carboxylate assisted method." In Nanotechnology in Mesostructured Materials, Proceedings of the 3rd International Materials Symposium, 209–12. Elsevier, 2003. http://dx.doi.org/10.1016/s0167-2991(03)80364-6.

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