Natural Double Layered Hydroxides: Structure, Chemistry, and Information Storage Capacity

Krivovichev, Sergey V.; Yakovenchuk, Victor N.; Zhitova, Elena S.

doi:10.1007/978-3-642-20018-2_9

Cited by 13 publications

(19 citation statements)

References 30 publications

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“…In their structures, Mg 2+ and Al 3+ cations have ordered arrangements forming a × superstructure within the brucite-type layers. The stacking of the layers agrees with the rhombohedral pattern, but the cation ordering results in the decreasing of symmetry from rhombohedral to monoclinic (1 M polytype) (Krivovichev et al ., 2010 b , 2012 a , b , Zhitova et al , 2016 a ).…”

Section: Resultsmentioning

confidence: 99%

“…Crystal chemistry and information storage capacity of quinitinite-2 T -3 c [6 R ], 1 M and 2 H were reviewed by Krivovichev et al . (2012 b ). Quintinite-1 M was also described from rodingites at the Bazhenovskoe deposit (Middle Ural, Russia) (Krivovichev et al ., 2012 a ) and cavities of metasomatically altered gabbro at Mariinskoe deposit (Middle Ural, Russia) (Zhitova et al ., 2016 a ).…”

Section: Introductionmentioning

confidence: 99%

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Crystal chemistry of natural layered double hydroxides: 4. Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline-ultrabasic massif, Kola peninsula, Russia

et al. 2018

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Two quintinite polytypes, 3R and 2T, which are new for the Kovdor alkaline-ultrabasic complex, have been structurally characterized. The crystal structure of quintinite-2T was solved by direct methods and refined to R1 = 0.048 on the basis of 330 unique reflections. The structure is trigonal, P$\bar 3$c1, a = 5.2720(6), c = 15.113(3) Å and V = 363.76(8) Å3. The crystal structure consists of [Mg2Al(OH)6]+ brucite-type layers with an ordered distribution of Mg2+ and Al3+ cations according to the $\sqrt 3 $ × $\sqrt 3 $ superstructure with the layers stacked according to a hexagonal type. The complete layer stacking sequence can be described as …=Ab1C = Cb1A=…. The crystal structure of quintinite-3R was solved by direct methods and refined to R1 = 0.022 on the basis of 140 unique reflections. It is trigonal, R$\bar 3$m, a = 3.063(1), c = 22.674(9) Å and V = 184.2(1) Å3. The crystal structure is based upon double hydroxide layers [M2+,3+(OH)2] with disordered distribution of Mg, Al and Fe and with the layers stacked according to a rhombohedral type. The stacking sequence of layers can be expressed as …=АB = BC = CA=… The study of morphologically different quintinite generations grown on one another detected the following natural sequence of polytype formation: 2H → 2T → 1M that can be attributed to a decrease of temperature during crystallization. According to the information-based approach to structural complexity, this sequence corresponds to the increasing structural information per atom (IG): 1.522 → 1.706 → 2.440 bits, respectively. As the IG value contributes negatively to the configurational entropy of crystalline solids, the evolution of polytypic modifications during crystallization corresponds to the decreasing configurational entropy. This is in agreement with the general principle that decreasing temperature corresponds to the appearance of more complex structures.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crystal chemistry of natural layered double hydroxides: 4. Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline-ultrabasic massif, Kola peninsula, Russia

et al. 2018

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“…Thus, the presence of the reflection with d = 4.57 Å in the powder pattern of pure LDHs having M 2+ :M 3+ = 2:1 is a reliable indicator of cation ordering similar to the Li 2 Al LDHs [47][48][49][50]. In contrast to Cl-bearing hydrotalcite-supergroup members, the carbonate species have been structurally characterized in more details including recent single-crystal or Rietveld structure refinements of hydrotalcite [31], pyroaurite [51][52][53], quintinite [34,[53][54][55][56][57][58], takovite [59], and zaccagnaite [60]. It has been found that C atoms of CO 3 groups occupy central parts of the interlayer prisms (Figure 7b), whereas O atoms of CO 3 groups and H 2 O molecules are disordered around the middle points of the prism edges.…”

Section: Discussionmentioning

confidence: 99%

Crystal Chemistry of Chlormagaluminite, Mg4Al2(OH)12Cl2(H2O)2, a Natural Layered Double Hydroxide

et al. 2019

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Chlormagaluminite is the only Cl-dominated hydrotalcite-supergroup mineral species with M2+:M3+ = 2:1. The holotype sample of chlormagaluminite from the Kapaevskaya volcanic pipe (Irkutsk Oblast, Siberia, Russia) has been chemically and structurally characterized. The average chemical composition of the mineral is (electron microprobe, OH content is calculated by stoichiometry and H2O from the crystal-structure data, wt. %): MgO 33.85, FeO 1.09, Al2O3 22.07, Cl 14.72, H2Otot 30.96, Cl=O −3.39, total 99.30. The empirical formula based on Mg + Al + Fe = 6 atoms per formula unit (apfu) is [Mg3.91Fe2+0.07Al2.02(OH)12]Cl2.02(H2O)2.0(2). The crystal structure has been solved from single-crystal X-ray diffraction data in the space group P63/mcm, a = 5.268(3), c = 15.297(8) Å and V = 367.6(4) Å3. The refinement converged to R1 = 0.083 on the basis of 152 unique reﬂections with I > 2σ(I) collected at room conditions. The powder pattern contains standard reflections of a 2H polytype and two additional reflections [(010), d010 = 4.574 Å; (110), d110 = 2.647 Å] indicative of Mg and Al ordering according to the superstructure. The structure is based upon brucite-type octahedral layers with an ordered distribution of Mg and Al over octahedral sites. The Cl− anions and H2O molecules reside in the interlayer, providing a three-dimensional integrity of the structure.

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“…Moreover LDHs have found applications in pharmacology and biochemistry (Choy et al, 2001;Aisawa et al, 2001;Arco et al, 2004;Nalawade et al, 2009;Conterosito et al, 2013) and are considered as important materials for solution of the number of environmental and agricultural issues (Génin et al 2008(Génin et al , 2013(Génin et al , 2014aZümreoglu-Karan and Ay, 2012;Tiwari and Syvajarvi, 2014;Radha and Navrotsky, 2014;Manohara, 2014;Benício et al, 2015). LDHs have been discussed as probable matrices for the origin of life as prebiotic information storage and transfer compounds (Greenwell and Coveney, 2006), though this idea has received some criticism later (Krivovichev et al 2012b).…”

Section: Introductionmentioning

confidence: 99%

Correlation between the d-value and the M2+:M3+ cation ratio in Mg–Al–CO3 layered double hydroxides

Zhitova

Krivovichev

Pekov

et al. 2016

Applied Clay Science

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Natural Double Layered Hydroxides: Structure, Chemistry, and Information Storage Capacity

Cited by 13 publications

References 30 publications

Crystal chemistry of natural layered double hydroxides: 4. Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline-ultrabasic massif, Kola peninsula, Russia

Crystal chemistry of natural layered double hydroxides: 4. Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline-ultrabasic massif, Kola peninsula, Russia

Crystal Chemistry of Chlormagaluminite, Mg4Al2(OH)12Cl2(H2O)2, a Natural Layered Double Hydroxide

Correlation between the d-value and the M2+:M3+ cation ratio in Mg–Al–CO3 layered double hydroxides

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