Konta, J.: The word of the Editor ...9 // Melka, K.: The opening address to the Fifth Meeting of the European Clay Groups . . 10 // Plenary lectures: // Konta, J.: Man and clay ...11 // Mackenzie, R. C.: Soil clays: Subjects for chemistry, mineralogy or physics? ...25 // Session 1, Crystal structure and crystallochemistry of clay minerals: // Drits, V. A.: Some aspects of the study of the real crystal structure of clay minerals . . 33 // Daynyak, L. G.: Structural features of layer silicates and EFG calculations for an interpretation of their Mossbauer spectra ...43 // Bookin, A. S., Smoliar B. B.: Simulation of bond lengths in coordination polyhedra of 2: 1 layer silicates ...51 // Nikolaeva I. V., Anokhina, L. K., Kameneva, M. Yu., Kovalyova, L. T., Gabitova, R. U., Chalabov R. I.: Crystallochemical and typomorphic features of glauconite group // minerals ...57 // Ben Brahim, J., Besson, G., Tchoubar, C.: Layer succession and water molecules arrangement in a homogeneous two-water layer Na-smectite ...65 // Horváth, I.: The structural and crystallochemical aspects in dehydroxylation of clays . . 77 // Wiewióra, A., Weiss, Z., Krajíček, J.: Calculated and experimental X-ray diffraction patterns by transmission powder method ...87 // Árkai, P., Tóth, M. N.: The variance method investigation of illite crystallinity ... 91 // Session 2, Mineralogy and geochemistry of the argillosphere: // Stoch, L.: Evolution of clay minerals and circulation of elements in argillosphere ... 99 // Bidló, G.: Mineralogical investigation of Middle Pliocene and Pliocene-Pleistocene transitional clays ...111 // Guzel, N., Wilson, M. J.: High-magnesium clays from alluvial soils of the Acipayam plain, Southern Turkey ...117 // Králík, J., Němec, J., Uher, A.: Organic and clay diagenesis in sediments of the Ostrava—Karviná Coal Basin ...125 //
Viczián, I.: Diagenetic transformation of mixed-layer illite/smectites in deep zones of the Pannonian Basin (Hungary) ...135 // Fiala, V., Cimpl, M.: Adsorption of uranium (VI) by clays ...141 // Bouška, Vl., Pešek, J.: Boron in the aleuropelites of the Bohemian Massif ...147 // Vitovskaya, 1. V.: Nontronite — its structure and genesis ...157 // Stefanov, D.: Regularly interstratified chlorite/swelling chlorite from East Rhodopes, Bulgaria ...163 // Melka, K., Pošmourný, K.: Stilpnomelane from the Proterozoic of the Krkonoše Mts. ...169 // Martín Patino, T., Saavedra, J., Millán, A.: A mineralogical study of aluminium hydroxides and oxihydroxides in profiles of granitic alterations in Spain’s mid-west ...181 // Session 3, Clay substance and recent environments: // Veniale, F., Caucia, F., Cocito, S., Setti, M., Soggetti, F.: Clay substance and recent environments ...187 // Šimek, J., Previtali, F.: Relationships between clayey soils, parent rock and environmental conditions in the Appennines of Lombardy (N. Italy) ...197 // Kazansky, Yu. P.: On the role of clay minerals in continental sedimentation ...205 // Kurnosov, V., Kholodkevich, I.: Conditions of the formation of clay minerals in the basaltic shell of the ocean ...209 // Čichovský, L.: Changes due to weathering of calcareous marlstones of some historic buildings in Prague ...215 // Borovec, Z., Šrámek, J., Tolar, V.: Weathering of arkosic sandstones on historical buildings and statues, central Bohemia ...225 // Vuorinen, A., Carlson, L.: Interaction of silica and iron in formation of natural iron oxyhydroxide precipitates ...235 // Session 4, Interaction of clay and organic substance: // Degens, E. T.: Clay-organic interactions at 3 to 300 degrees Kelvin ...241 // Klubova, T. T.: Pattern of interactions of clay minerals and organic matter ...253 //
Thomas, F., Andreux, F., Bottero, J. Y.: Etude thermodynamique de l’adsorption de 1’ion dodecylammonium sur le kaolin et application aux mecanismes d’adsorption des amino-acides et des peptides ...259 // Herrmann, H., Lagaly, G.: ATP — clay interactions ...269 // Polakovič, J., Polakovičová, J., Sokoly, J.: Interaction between kaolinite surface and hematoxyline ...279 // Berlinger, H.: Thermoanalytische Untersuchungen der Montmorillonit-AminosäurenKomplexe ...283 // Session 5, Deposits of clay raw materials: // Störr, M.: Age correlation of the kaolins of Europe (Abstract) ...291 // Zlatanovic, V., Zafirovski, S., Pavlovski, B., Jašmakovski, B.: Beitrag zur Erforschung kaolinisierter Gesteine in der SR Makedonien ...293 // Mattias, P.: The refractory clays of Nurallao-Nuoro, Sardinia (Italy) ...301 // Kužvart, M., Neužil, J., Reichelt, M., Hlavsa, J., Janda, Z.: The deposit of refractory claystones at Kačice near Libušin (central Bohemia) ...309 // Šamajová, E., Kraus, I.: Distribution of smectites and zeolites in the West Carpathians ...321 // Kužvart, M., Neužil, J., Reichelt, M.: Petrographival-mineralogical character of the kaolin from the Vidnava deposit (north Moravia, Czechoslovakia) ...329 // Korecký, J., Melka, K., Šantrůček, P.: X-ray quantitative phase analysis of the kaolinite bond clay from the Cheb Basin in west Bohemia ...341 // Nikitina, A. P.: Distribution and genesis of clay minerals and free alumina minerals in the // deposits of residual bauxites in the European part of the USSR ...351 // Slukin, A. D.: Role of kaolinite in the formation of bauxite ...359 // Mattias, P.: Bentonites in Italy — their occurrence and genesis ...365 // Todorova, T.: Genetic types of smectite deposits in Bulgaria ...371 // Atanasov, G., Goranov, A., Stefanov, D.: Paleogene montmorillonite clays from South Bulgaria ...377 //
Session 6, Investigation methods of clay substance: // Thorez, J.: Qualitative clay mineral analyses biased by sample treatments ...383 // Krajíček, J., Weiss, Z., Wiewióra, A.: Kaolins: Computer-aided X-ray quantitative phase analysis ...391 // Schomburg, J.: Contributions of dilatometric investigations of the diagnosis of layer silicates ...397 // Kromer, H., Schüller, K. H., Sevilgen, E.: Thermal analysis in the study of the sintering behaviour of clays ...403 // Kotov, N. V., Nikitina, A. P., Ivanov, V. P.: Experimental investigation of the transformation of some rocks formed in the weathering crust under elevated PH2O — T parameters ...409 // Session 7, Clay substance in soils: // Pedro, G., Tessier, D.: Importance de la prise en compte des parametres texturaux dans la caracterisation des argiles ...417 // De Coninck, F., Van Ranst, E.: Stability of gibbsite and mineralogy in soils on granitic // rocks from Corsica ...429 // Stoch, L., Wilgat, M.: Swelling minerals of selected soils in Poland ...437 // Szerszeń, L., Chodak, T.: Clay minerals in soils of the arctic climatic zone exemplified by south-west Spitsbergen ...445 // Singer, A.: The clay mineralogy of basalt-derived paleosols ...453 // Henmi, T.: Importance of chemical composition (SiO2/Al2O3 ratio) as factor affecting physico-chemical properties of allophanes from weathered volcanic ash and pumice ...459 // de Vidales, J. L. M., Sanz, J., Guijarro, J., Hoyos, M. A., Casas J.: Smectite origins in the volcanic soils of the Calatrava region (Central Spain) ...465 // Szendrei, G.: The stability and distribution of clay minerals in Hungarian salt affected soils 471 // Borggaard, O. K.: Evidence in favour of considering soil iron oxides as composed of only two fractions ...477 // Session
Rosenqvist, I. T.: Mineralogical physical and chemical factors determining mechanical properties of remolded clays and clay sediments ...485 // Seidov, A. G., Kheirov, M. B., Daidbekova, E. A., Pashaly, N. V.: The role of clay minerals // in oil and gas prospecting and development (on the example of the eastern Transcaucasus) ...491 // Ovcharenko, F. D.: The nature of the surface of clay minerals: its role in colloid and // chemical phenomena ...499 // Bellinfante, N., Garcia-Valdecasas, M., Tirado, J. L., Paneque G.: Ceramic applications of argillaceous materials from Cordoba (Spain) ...505 // Kreimeyer, R.: Die Ahängigkeit der Brennfarbe von Ziegeln von der Zusammensetzung // der Ausgangssubstanz (The dependence of the firing color of bricks on the // composition of the raw materials) ...515 // Dehne, G.: Die Abhängigkeit der Fluoremission beim Brand keramischer Produkte von den Brennbedingungen und der Zusammensetzung der Ausgangssubstanz ...521 // Urban, H., Babczinski, L., Wedemeyer, U.: Illite chemistry and ceramic properties of brick products ...529 // Huff, W. D.: Trace element variation in Ordovician K-bentonites and its use in stratigraphic correlation ...535 // Posters // Chodak, T., Jahn, A.: Studies on clay minerals in a Tertiary regolith from the Sudetes Mts. 541 // Manceau, A., Calas, G.: Short and medium range order in nickeliferous clay minerals by X-ray absorption spectroscopy ...547 // Nornberg, P., Dalsgaard, K.: The origin of clay minerals in soils on Danian chalk ...553 // Patzkö, Ä., Szanto, F.: The adsorption of cation active surfactants on clay minerals and the examination of organocomplexes ...563 // Tsipursky, S. I., Kameneva, M. Yu., Drits, V. A.: Structural transformations of Fe3+containing 2 : 1 dioctahedral phyllosilicates in the course of dehydration ...567 //
Weiss, Z., Durovic, S.: A unified classification and X-ray identification of polytypes of 2 : 1 phyllosilicates ...579 // Dalsgaard, K., Nürnberg, P.: Formation of structurized ‘amourphous’ ironoxide cutans in // a soil below a Roman Iron Age barrow ...585 // Hofmann, H., Mosler, H.: Wechselwirkung von Tonen und Kaolin mit Sauren ... 591 // Perez Rodriguez, J. L., Ruiz Carvajal, J., De la Rosa D., Maqueda, C.: Cation exchange // capacity vs. mineralogical and engineering properties in Seville soils ...603 // Prikryl, J., Dvorak, J.: Modification of physico-chemical properties of clay/water suspensions by styrene maleic anhydride copolymer ...609 // Vladykin, N. V.: Zn-montmorillonite in alkali granite pegmatites (Abstract) ...615 // Van der Gaast, S. J., Kühnel, R. A.: Effects of different cations and relative humidity on hydration-dehydration mechanism of Wyoming montmorillonite (Abstract) 618