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Title: Structural Evolution of CO 2 -Filled Pure Silica LTA Zeolite under High-Pressure High-Temperature Conditions

Authors:
ORCiD logo; ; ; ; ; ; ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1368292
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 29; Journal Issue: 10
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Santamaría-Pérez, David, Marqueño, Tomas, MacLeod, Simon, Ruiz-Fuertes, Javier, Daisenberger, Dominik, Chuliá-Jordan, Raquel, Errandonea, Daniel, Jordá, Jose Luis, Rey, Fernando, McGuire, Chris, Mahkluf, Adam, Kavner, Abby, and Popescu, Catalin. Structural Evolution of CO 2 -Filled Pure Silica LTA Zeolite under High-Pressure High-Temperature Conditions. United States: N. p., 2017. Web. doi:10.1021/acs.chemmater.7b01158.
Santamaría-Pérez, David, Marqueño, Tomas, MacLeod, Simon, Ruiz-Fuertes, Javier, Daisenberger, Dominik, Chuliá-Jordan, Raquel, Errandonea, Daniel, Jordá, Jose Luis, Rey, Fernando, McGuire, Chris, Mahkluf, Adam, Kavner, Abby, & Popescu, Catalin. Structural Evolution of CO 2 -Filled Pure Silica LTA Zeolite under High-Pressure High-Temperature Conditions. United States. doi:10.1021/acs.chemmater.7b01158.
Santamaría-Pérez, David, Marqueño, Tomas, MacLeod, Simon, Ruiz-Fuertes, Javier, Daisenberger, Dominik, Chuliá-Jordan, Raquel, Errandonea, Daniel, Jordá, Jose Luis, Rey, Fernando, McGuire, Chris, Mahkluf, Adam, Kavner, Abby, and Popescu, Catalin. Wed . "Structural Evolution of CO 2 -Filled Pure Silica LTA Zeolite under High-Pressure High-Temperature Conditions". United States. doi:10.1021/acs.chemmater.7b01158.
@article{osti_1368292,
title = {Structural Evolution of CO 2 -Filled Pure Silica LTA Zeolite under High-Pressure High-Temperature Conditions},
author = {Santamaría-Pérez, David and Marqueño, Tomas and MacLeod, Simon and Ruiz-Fuertes, Javier and Daisenberger, Dominik and Chuliá-Jordan, Raquel and Errandonea, Daniel and Jordá, Jose Luis and Rey, Fernando and McGuire, Chris and Mahkluf, Adam and Kavner, Abby and Popescu, Catalin},
abstractNote = {},
doi = {10.1021/acs.chemmater.7b01158},
journal = {Chemistry of Materials},
number = 10,
volume = 29,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2017},
month = {Wed May 10 00:00:00 EDT 2017}
}
  • To cement deep oil wells and high-temperature geothermal wells, special cements with superior cementing properties, hardening characteristics, and durability under high-temperature and high-pressure conditions are required. Therefore, the authors have been accumulating technical data on a special cement consisting of 2CaO/SiO/sub 2/ and silica. In this paper, strength development at 290 to 842/sup 0/F (143 to 450/sup 0/C) was investigated for the mixtures of three 2CaO/SiO/sub 2/ modifications (..gamma.., ..beta.., and ..cap alpha..) and quartz. Various analyses were carried out on hardened specimens and the mechanism of hydrothermal reaction for these mixtures is discussed. Within the limits of this experiment,more » the authors conclude that the strength of 2CaO/SiO/sub 2/-quartz mixtures depends on 2CaO/SiO/sub 2/ modifications, curing temperature, and curing time, but the influences of curing pressure and increasing rate of temperature are relatively minor. Moreover, they assume that the difference of reaction rate of 2CaO/SiO/sub 2/ and quartz, the type of hydration products, and the producing conditions will result in the difference of strength, depending on 2CaO/SiO/sub 2/ modification.« less
  • The high-pressure behavior of the pyroxene-type compound LiAlGe{sub 2}O{sub 6}, the unique representative of a P2{sub 1}/n-pyroxene, was investigated by in-situ X-ray diffraction and Raman spectroscopy on single-crystal samples hydrostatically pressurized in a diamond-anvil cell. The structure was found to undergo a first-order phase transition on compression, with a critical transition at 5.23±0.02 GPa. Together with a strong volume discontinuity of −ΔV/V{sub 0}=−4.1% the transition shows a remarkable hysteresis loop over at least 0.70 GPa pressure interval. The bulk modulus of the low- and high-pressure polymorphs corresponds to K{sub 0}=114(1) and 123(2) GPa, respectively, as described by a 2{sup nd}more » order Birch–Murnaghan equation of state. Based on the systematic extinctions the transition was identified as a P2{sub 1}/n-to-P2{sub 1}/c transformation. The mechanism of structural transformation was identified to be controlled by the stereochemistry of the Li atoms at the M2 site, which changes its coordination number from 5 to 6. The formation of new Li–O bonds involves the co-operative folding of Ge{sub 2}O{sub 6}-chains, which explains the anisotropy of axial elasticities and the spontaneous strain across the transformation. Simultaneously the distortion correction of AlO{sub 6} units associated with the transition further explains the preference of the P2{sub 1}/c structure under pressure. - Graphical abstract: Detail of the crystal structures of LP-LAG at 3.48 GPa (left) and HP-LAG at 4.51 GPa (right). Li on M2 are green; AlO{sub 6} octahedra (Al at M1) are orange; tetrahedra sites in LP-LAG: T1 (yellow) and T2 (blue); tetrahedra sites in HP-LAG: A-chains (yellow), B-chains (blue). - Highlights: • A new high-pressure phase transition P2{sub 1}/n–P2{sub 1}/c was found for LaAlGe{sub 2}O{sub 6}. • The transition was also followed by micro-Raman spectroscopy. • The high-pressure polymorph shows a higher bulk modulus. • The structural evolution of the two symmetries was determined.« less
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