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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

Published online by Cambridge University Press:  28 February 2018

Elena S. Zhitova ,
Sergey V. Krivovichev ,
Viktor N. Yakovenchuk ,
Gregory Yu. Ivanyuk ,
Yakov A. Pakhomovsky  and
Julia A. Mikhailova
Elena S. Zhitova*
Affiliation:
Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
Sergey V. Krivovichev
Affiliation:
Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
Viktor N. Yakovenchuk
Affiliation:
Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
Gregory Yu. Ivanyuk
Affiliation:
Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
Yakov A. Pakhomovsky
Affiliation:
Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
Julia A. Mikhailova
Affiliation:
Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia
*
*E-mail: zhitova_es@mail.ru
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Abstract

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.

Keywords

quintiniteKovdor phoscorite-carbonatite complexnatural layered double hydroxideshydrotalcite supergroup
Type
Article
Information
Mineralogical Magazine , Volume 82 , Issue 2 , April 2018 , pp. 329 - 346
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2018 

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Footnotes

Associate Editor: Ed Grew

References

Allmann, R. (1968) The crystal structure of pyroaurite. Acta Crystallographica, B24, 972–977.Google Scholar
Allmann, R. and Jepsen, H.P. (1969) Die Struktur des Hydrotalkits. Neues Jahrbuch fur Mineralogie, Monatshefte, 544–551.Google Scholar
Amelin, Y. and Zaitsev, A.N. (2002) Precise geochronology of phoscorites and carbonatites: the critical role of U-series disequilibrium in age interpretations. Geochimica et Cosmochimica Acta, 66, 2399–2419.Google Scholar
Arakcheeva, A.V., Pushcharovskii, D.Yu., Atencio, D. and Lubman, G.U. (1996) Crystal structure and comparative crystal chemistry of Al2Mg4(OH)12(CO3)×3H2O, a new mineral from the hydrotalcite-manasseite group. Crystallography Report, 41, 972–981.Google Scholar
Bayanova, T.B., Kirnarsky, Y.M. and Levkovich, N.V. (1997) U-Pb study of baddeleyite from Kovdor massif rocks. Doklady Akademii Nauk, 356, 509–511 [in Russian].Google Scholar
Bindi, L., Christy, A., Mills, S.J., Ciriotti, M.E. and Bittarello, E. (2015) New compositional and structural data validate the status of jamborite. The Canadian Mineralogist, 53, 791–802.Google Scholar
Bookin, A.S. and Drits, V.A. (1993) Polytype diversity of the hydrotalcite-like minerals. I. Possible polytypes and their diffraction patterns. Clays and Clay Minerals, 41, 551–557.Google Scholar
Britto, S. and Kamath, P.V. (2009) Structure of bayerite-based lithium-aluminum layered double hydroxides (LDHs): observation of monoclinic symmetry. Inorganic Chemistry, 48, 11646–11654.Google Scholar
Britto, S., Thomas, G.S., Kamath, P.V. and Kannan, S. (2008) Polymorphism and structural disorder in the carbonate containing Layered Double Hydroxides of Al and Li. The Journal of Physical Chemistry, C112, 9510–9515.Google Scholar
Britvin, S.N., Chukanov, N.V., Bekenova, G.K., Yagovkina, M.A., Antonov, A.V., Bogdanova, A.N. and Krasnova, N.I. (2007) Karchevskyite [Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11] – a new mineral in family of layered double hydroxides. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 136(5), 52–64.Google Scholar
Cavani, F., Trifiro, F. and Vaccari, A. (1991) Hydrotalcite-type anionic clays: preparation, properties and applications. Catalysis Today, 11, 173–301.Google Scholar
Chao, G.Y. and Gault, R.A. (1997) Quintinite-2H, quintinite-3T, charmarite-2H, charmarite-3T and caresite-3T, a new group of carbonate minerals related to the hydrotalcite/manasseite group. The Canadian Mineralogist, 35, 1541–1549.Google Scholar
Chukanov, N.V., Pekov, I.V., Levitskaya, L.A. and Zadov, A.E. (2008) Ni3Fe3+Cl(OH)8·2H2O, a new hydrotalcite-group mineral from the weathered meteorite Dronino. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 137, 38–46 [in Russian].Google Scholar
Chukanov, N.V., Pekov, I.V., Levitskaya, L.A. and Zadov, A.E. (2009) Ni3Fe3+Cl(OH)8·2H2O, a new hydrotalcite-group mineral from the weathered meteorite Dronino. Geology of Ore Deposits, 51, 767–773.Google Scholar
Drits, V.A. and Bookin, A.S. (2001) Crystal structure and X-ray identification of layered double hydroxides. Pp. 39–92 in: Layered Double Hydroxides: Present and Future (Rives, V., editor). Nova Science Publishers Inc., New York.Google Scholar
Evans, D.G. and Slade, R.C.T. (2006) Structural aspects of layered double hydroxides. Pp. 1–87 in: Layered Double Hydroxides (Duan, X. and Evans, D.G., editors). Structure and Bonding vol. 119. Springer, Berlin.Google Scholar
Frost, R.L., Spratt, H.J. and Palmer, S.J. (2009) Infrared and near-infrared spectroscopic study of synthetic hydrotalcites with variable divalent/trivalent cationic ratios. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 72, 984–988.Google Scholar
Génin, J.-M.R., Guérin, O., Herbillon, A.J., Kuzmann, E., Mills, S.J., Morin, G., Ona-Nguema, G., Ruby, C. and Upadhyay, C. (2013) Redox topotactic reactions in Fe II−III(oxy)hydroxycarbonate new minerals related to fougèrite in gleysols: «trébeurdenite and mössbauerite». Hyperfine Interactions, 204, 71–81.Google Scholar
Génin, J.-M.R., Christy, A., Kuzmann, E., Mills, S. and Ruby, C. (2014 a) Structure and occurrences of <green rust> related new minerals of the. <fougérite> group, trébeurdenite and mössbauerite, belonging to the <hydrotalcite> supergroup; how Mössbauer spectroscopy helps XRD. Hyperfine Interactions, 226, 459–482.Google Scholar
Génin, J.-M.R., Mills, S.J., Christy, A.G., Guérin, O., Herbillon, A.J., Kuzmann, E., Ona-Nguema, G., Ruby, C. and Upadhyay, C. (2014 b) Mössbauerite, Fe3+6O4(OH)8[CO3]·3H2O, the fully oxidized ‘green rust’ mineral from Mont Saint-Michel Bay, France. Mineralogical Magazine, 78, 447–465.CrossRefGoogle Scholar
Ghamami, S., Golzani, M. and Lashgari, A. (2016) New inorganic-based nanohybrids of layered zinc hydroxide/Parkinson's disease drug and its chitosan biopolymer nanocarriers with controlled release rate. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 86, 67–78.Google Scholar
Ghiorso, M.S. and Evans, B.W. (2008) Thermodynamics of rhombohedral oxide solid solutions and a revision of the Fe-Ti two-oxide geothermometer and oxygen-barometer. American Journal of Science, 308, 957–1039.Google Scholar
Grguric, B.A., Madsen, I.C. and Pring, A. (2001) Woodallite, a new chromium analogue of iowaite from the Mount Keith nickel deposit, Western Australia. Mineralogical Magazine, 65, 427–435.Google Scholar
Guinier, A., Bokij, G.B., Boll-Dornberger, K., Cowley, J.M., Durovic, S., Jagodzinski, H., Krishna, P., DeWolff, P.M., Zvyagin, B.B., Cox, D.E., Goodman, P., Hahn, Th., Kuchitsu, K. and Abrahams, S.C. (1984) Nomenclature of polytype structures. Report of the International Union of Crystallography ad-hoc committee on the Nomenclature of discordered, modulated and polytype structures. Acta Crystallographica, A40, 399–404.CrossRefGoogle Scholar
Hadnadev-Kostić, M.S., Vulić, T.J. and Marinković-Nedućin, R.P. (2010) A study of thermally activated Mg–Fe layered double hydroxides as potential environmental catalysts. Journal of Serbian Chemical Society, 75, 1251–1257.Google Scholar
Hernandez-Moreno, M.J., Ulibarri, M.A., Rendon, J.L. and Serna, C.J. (1985) IR characteristics of hydrotalcite-like compounds. Physics and Chemistry of Minerals, 12, 34–38.Google Scholar
Hudson, D.R. and Bussell, M. (1981) Mountkeithite, a new pyroaurite-related mineral with an expanded interlayer containing exchangeable MgSO4. Mineralogical Magazine, 44, 345–350.CrossRefGoogle Scholar
Ivanyuk, G.Yu., Yakovenchuk, V.N. and Pakhomovsky, Ya.A. (2002) Kovdor. Laplandia Minerals, Apatity, Russia, 326 pp.Google Scholar
Ivanyuk, G.Yu., Kalashnikov, A.O., Pakhomovsky, Ya.A., Mikhailova, J.A., Yakovenchuk, V.N., Konopleva, N.G., Sokharev, V.A., Bazai, A.V. and Goryainov, P.M. (2016) Economic minerals of the Kovdor baddeleyite-apatite-magnetite deposit, Russia: mineralogy, spatial distribution, and ore processing optimization. Ore Geology Reviews, 77, 279–311.Google Scholar
Jayanthia, K. and Kamath, P.V. (2013) Observation of cation ordering and anion-mediated structure selection among the layered double hydroxides of Cu(II) and Cr(III). Dalton Transactions, 42, 13220–13230.Google Scholar
Jayanthi, K. and Kamath, P.V. (2016) A crystal chemical approach to a cation-ordered structure model for carbonate-intercalated layered double hydroxides. Crystal Growth and Design, 16, 4450–4456.Google Scholar
Jayanthi, K., Nagendran, S. and Kamath, P.V. (2015) Layered Double Hydroxides: proposal of a one-layer cation-ordered structure model of monoclinic symmetry. Inorganic Chemistry, 54, 8388–8395.Google Scholar
Klemkaite, K., Prosycevas, I., Taraskevicius, R., Khinsky, A. and Kareiva, A. (2011) Synthesis and characterization of layered double hydroxides with different cations (Mg, Co, Ni, Al), decomposition and reformation of mixed metal oxides to layered structures. Central European Journal of Chemistry, 9, 275–282.Google Scholar
Kloprogge, J.T. (2005) Infrared and Raman spectroscopy of naturally occurring hydrotalcites and their synthetic equivalent. The Application of vibrational spectroscopy to clay minerals and Layered Double Hydroxides. Pp. 203–238 in: CMS Workshop Lectures, vol. 13 (Kloprogge, J.T., editor). The Clay Mineral Society, Aurora, USA.Google Scholar
Kolitsch, U., Giester, G. and Pippinger, T. (2013) The crystal structure of cualstibite-1M (formerly cyanophyllite), its revised chemical formula and its relation to cualstibite-1T. Mineralogy and Petrology, 107, 171–178.CrossRefGoogle Scholar
Krivovichev, S.V. (2012) Topological complexity of crystal structures: quantitative approach. Acta Crystallographica, A68, 393–398.Google Scholar
Krivovichev, S.V. (2013) Structural complexity of minerals: information storage and processing in the mineral world. Mineralogical Magazine, 77, 275–326.Google Scholar
Krivovichev, S.V. (2014) Which inorganic structures are the most complex? Angewandte Chemie International Edition, 53, 654–661.Google Scholar
Krivovichev, S.V. (2015) Structural complexity of minerals and mineral parageneses: information and its evolution in the mineral world. Pp. 31–73 in: Highlights in Mineralogical Crystallography (Danisi, R. and Armbruster, T., editors). Walter de Gruyter GmbH, Berlin/Boston.Google Scholar
Krivovichev, S.V. (2016) Structural complexity and configurational entropy of crystalline solids. Acta Crystallographica, B72, 274–276.Google Scholar
Krivovichev, S.V., Yakovenchuk, V.N., Zhitova, E.S., Zolotarev, A.A., Pakhomovsky, Y.A. and Ivanyuk, G.Y. (2010 a) Crystal chemistry of natural layered double hydroxides. 1. Quintinite-2H-3c from the Kovdor alkaline massif, Kola peninsula, Russia. Mineralogical Magazine, 74, 821–832.Google Scholar
Krivovichev, S.V., Yakovenchuk, V.N., Zhitova, E.S., Zolotarev, A.A., Pakhomovsky, Y.A. and Ivanyuk, G.Yu. (2010 b) Crystal chemistry of natural layered double hydroxides. 2. Quintinite-1M: First evidence of a monoclinic polytype in M2+-M3+ layered double hydroxides. Mineralogical Magazine, 74, 833–840.Google Scholar
Krivovichev, S.V., Antonov, A.A., Zhitova, E.S., Zolotarev, A.A., Krivovichev, V.G. and Yakovenchuk, V.N. (2012 a) Quintinite-1M from Bazhenovskoe deposit (Middle Ural, Russia): crystal structure and properties. Bulletin of Saint-Petersburg State University, Ser. Geology and Geography, 7, 3–9 [in Russian].Google Scholar
Krivovichev, S.V., Yakovenchuk, V.N. and Zhitova, E.S. (2012 b) Natural double layered hydroxides: structure, chemistry, and information storage capacity. Pp. 87–91 in: Minerals as Advanced Materials II (Krivovichev, S.V., editor). Springer-Verlag, Berlin Heidelberg.Google Scholar
Le Maitre, R.W. (editor) (2002) Igneous rocks. A Classification and Glossary of Terms. Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks. Cambridge University Press, UK.Google Scholar
Lozano, R.P., Rossi, C., La Iglesia, A. and Matesanz, E. (2012) Zaccagnaite-3R, a new Zn-Al hydrotalcite polytype from El Soplao cave (Cantabria, Spain). American Mineralogist, 97, 513–523.Google Scholar
Marappa, S. and Kamath, P.V. (2015) Structure of the carbonate-intercalated Layered Double Hydroxides: A reappraisal. Industrial and Engineering Chemistry Research, 54, 11075–11079.Google Scholar
Melchiorre, E.B., Bottrill, R., Huss, G.R. and Lopez, A. (2017) Conditions of stichtite (Mg6Cr2(OH)16[CO3]·4H2O) formations and its geochemical and isotope record of early Phanerozoic serpentinizing environments. Geochimica and Cosmochimica Acta, 197, 43–61.Google Scholar
Mills, S.J., Whitfield, P.S., Wilson, S.A., Woodhouse, J.N., Dipple, G.M., Raudsepp, M. and Francis, C.A. (2011) The crystal structure of stichtite, re-examination of barbertonite, and the nature of polytypism in MgCr hydrotalcites. American Mineralogist, 96, 179–187.CrossRefGoogle Scholar
Mills, S.J., Christy, A.G., Génin, J-M.R., Kameda, T. and Colombo, F. (2012 a) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76, 1289–1336.Google Scholar
Mills, S.J., Christy, A.G., Kampf, A.R., Housley, R.M., Favreau, G., Boulliard, J–C. and Bourgoin, V. (2012 b) Zincalstibite-9R: the first nine-layer polytype with the layered double hydroxide structure-type. Mineralogical Magazine, 76, 1337–1345.Google Scholar
Mills, S.J., Kampf, A.R., Housley, R.M., Favreau, G., Pasero, M., Biagioni, C., Merlino, S., Berbain, C. and Orlandi, P. (2012 c) Omsite, (Ni,Cu)2Fe3+(OH)6[Sb(OH)6], a new member of the cualstibite group from Oms, France. Mineralogical Magazine, 76, 1347–1354.Google Scholar
Mills, S.J., Whitfield, P.S., Kampf, A.R., Wilson, S.A., Dipple, G.M., Raudsepp, M. and Favreau, G. (2012 d) Contribution to the crystallography of hydrotalcites: the crystal structures of woodallite and takovite. Journal of Geosciences, 58, 273–279.Google Scholar
Mills, S.J., Christy, A.G. and Schmitt, R.T. (2016) The creation of neotypes for hydrotalcite. Mineralogical Magazine, 80, 1023–1029.CrossRefGoogle Scholar
Mikhailova, J.A., Kalashnikov, A.O., Sokharev, V.A., Pakhomovsky, Ya.A., Konopleva, N.G., Yakovenchuk, V.N., Bazai, A.V., Goryainov, P.M. and Ivanyuk, G. Yu. (2016) 3D mineralogical mapping of the Kovdor phoscorite–carbonatite complex (Russia). Mineralium Deposita, 51(1), 131–149.Google Scholar
Moroz, T.N. and Arkhipenko, D.K. (1991) The crystal-chemical study of natural hydrotalcites. Soviet Geology and Geophysics, 32, 52–58.Google Scholar
Nickel, E.H. and Wildman, J.E. (1981) Hydrohonessite – a new hydrated Ni-Fe hydroxy-sulphate mineral; its relationship to honessite, carrboydite, and minerals of the pyroaurite group. Mineralogical Magazine, 44, 333–337.Google Scholar
Panikorovskii, T.L., Zhitova, E.S., Krivovichev, S.V., Zolotarev, A.A., Britivn, S.N., Yakovenchuk, V.N. and Krzhizhanovskaya, M.G. (2015) Thermal «memory effect» in quintinite polytypes-2H, -3R, and -1M. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 144, 109–119 [in Russian with English Abstract].Google Scholar
Prikhod'ko, R.V., Sychev, M.V., Astrelin, I.M., Erdmann, K., Mangel', A. and van Santen, R.A. (2001) Synthesis and structural transformations of hydrotalcite-like materials Mg-Al and Zn-Al. Russian Journal of Applied Chemistry, 74, 1621–1626.CrossRefGoogle Scholar
Radha, S. and Kamath, P.V. (2012) Structural synthon approach to predict the possible polytypes of layered double hydroxides. Zeitschrift für anorganische und allgemeine Chemie, 638, 2317–2323.Google Scholar
Radha, S., Jayanthi, K., Breu, J. and Kamath, P.V. (2014) Relative humidity-induced reversible hydration of sulfate-intercalated layered double hydroxides. Clays and Clay Minerals, 62, 53–61.Google Scholar
Richardson, I.G. (2013) The importance of proper crystal-chemical and geometrical reasoning demonstrated using layered single and double hydroxides. Acta Crystallographica, B69, 150–162.Google Scholar
Rives, V. (editor) (2001) Layered Double Hydroxides: Present and Future. Nova Science Publishers, Incorporated, New York, USA.Google Scholar
Rocha, J., del Arco, M., Rives, V. and Ulibarri, M.A. (1999) Reconstruction of layered double hydroxides from calcined precursors: a powder XRD and 27Al MAS NMR study. Journal of Materials Chemistry, 9, 2499–2503.Google Scholar
Rodionov, N., Belyatsky, B.V., Antonov, A.V., Kapitonov, I.N. and Sergeev, S.A. (2012) Comparative in-situ U–Th–Pb geochronology and trace element composition of baddeleyite and low-U zircon from carbonatites of the Palaeozoic Kovdor alkaline-ultramafic complex, Kola Peninsula, Russia. Gondwana Research, 21, 728–744.Google Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.Google Scholar
Sissoko, I., Iyagba, E.T., Sahai, R. and Biloen, P. (1985) Anion intercalation and exchange in Al(OH)3-derived compounds. Journal of Solid State Chemistry, 60, 283–288.Google Scholar
Speck, A. (2003) Single-crystal structure validation with the program PLATON. Journal of Applied Crystallography, 36, 7–13.CrossRefGoogle Scholar
Stanimirova, Ts. and Balek, V. (2008) Characterization of layered double hydroxide Mg-Al-CO3 prepared by re-hydration of Mg-Al mixed oxide. Journal of Thermal Analysis and Calorimetry, 94, 477–481.Google Scholar
Stanimirova, Ts., Stoilkova, T. and Kirov, G. (2007) Cation selectivity during re-crystallization of Layered Double Hydroxides from mixed (Mg, Al) oxides. Geochemistry, mineralogy and petrology, 45, 119–127 [in Bulgarian with English Abstract].Google Scholar
Streckeisen, A. (1980) Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks, IUGS Subcommission on the Systematics of Igneous Rocks, recommendations and suggestions. Geologische Rundschau, 69, 194–207.Google Scholar
Theiss, F., López, A., Frost, R.L. and Scholz, R. (2015) Spectroscopic characterisation of the LDH mineral quintinite Mg4Al2(OH)12CO3×3H2O. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 150, 758–764.Google Scholar
Tsukanov, A.A. and Psakhie, S.G. (2016) Energy and structure of bonds in the interaction of organic anions with layered double hydroxide nanosheets: A molecular dynamics study. Scientific Reports, 6, 1–7.Google Scholar
Vucelic, M., Jones, W. and Moggridge, G.D. (1997) Cation ordering in synthetic layered double hydroxides. Clays and Clay Minerals, 45, 803–813.Google Scholar
Witzke, T. (1999) Hydrowoodwardite, a new mineral of the hydrotalcite group from Königswalde near Annaberg, Saxony/Germany and other localities. Neues Jahrbuch für Mineralogie, Monatshefte, 1999, 75–86.Google Scholar
Xu, Z.P. and Lu, G.Q.M. (2005) Hydrothermal synthesis of Layered Double Hydroxides (LDHs) from mixed MgO and Al2O3: LDH formation mechanism. Chemistry of Materials, 17, 1055–1062.Google Scholar
Zhang, Y. and Evans, J.R.G. (2012) Alignment of layered double hydroxide platelets. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 408, 71–78.Google Scholar
Zhitova, E.S. (2013) Crystal Chemistry of Natural Layered Double Hydroxides. PhD thesis. Vol. 1(1). Saint Petersburg State University studies in Earth Sciences. St. Petersburg University Press, St. Petersburg, Russia.Google Scholar
Zhitova, E.S., Yakovenchuk, V.N., Krivovichev, S.V., Zolotarev, A.A., Pakhomovsky, Y.A. and Ivanyuk, G.Y. (2010) Crystal chemistry of natural layered double hydroxides. 3. The crystal structure of Mg, Al-disordered quintinite-2H. Mineralogical Magazine, 74, 841–848.Google Scholar
Zhitova, E.S., Ivanyuk, G.Yu., Krivovichev, S.V., Yakovenchuk, V.N., Pakhomovsky, Ya.A. and Mikhailova, Yu.A. (2016 a) Mineralogy and crystal chemistry of pyroaurite from the Kovdor massif (Kola peninsula, Russia) and Långban Fe-Mn deposit (Värmland, Sweden). Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 145, 81–94 [in Russian with English Abstract].Google Scholar
Zhitova, E.S., Krivovichev, S.V., Pekov, I.V., Yakovenchuk, V.N. and Pakhomovsky, Ya.A. (2016 b) Correlation between the d-value and the M 2+:M 3+ cation ratio in Mg–Al–CO3 layered double hydroxides. Applied Clay Science, 130, 2–11.Google Scholar
Zhitova, E.S., Popov, M.P., Krivovichev, S.V., Zaitsev, A.N. and Vlasenko, N.S. (2016 c) Quintinite-1M from the Mariinskoe deposit, Ural Emerald Mines, Southern Urals, Russia. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 145, 90–101 [in Russian with English Abstract].Google Scholar