OOIR: Observatory of International Research

Papers

(The median citation count of Clays and Clay Minerals is 2. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-09-01 to 2025-09-01.)

Article	Citations
Rare Earth and Critical Element Chemistry of the Volcanic Ash-fall Parting in the Fire Clay Coal, Eastern Kentucky, USA	41
Calcined Palygorskites as Supplementary Cementitious Materials	37
Comparison of Epithermal Kaolin Deposits from the Etili Area (Çanakkale, Turkey): Mineralogical, Geochemical, and Isotopic Characteristics	37
Stability of Gaomiaozi bentonite: Interlayer hydration structure and aggregation morphology	31
Highly efficient TiO₂-pillared smectite clay with Ni and Co doping for Rhodamine B removal: kinetics of adsorption and photodegradation	24
Review of secondary phases formed under natural alkaline conditions at low temperatures and implications for cement–bentonite interactions in radioactive waste repositories	20
THE MAKING OF KAOLINITE SUSPENSION TIME-DEPENDENT IN THE STRUCTURAL REJUVENATION MODE – THE FACE CHARGE HYPOTHESIS	16
Tungstate intercalated Mg-Al layered double hydroxide and its derived mixed metal oxide: preparation, characterization, and investigation of optical, electrical, and dielectric properties	16
Effects of occurrence form of soil organic matter on the Atterberg limits and thermal conductivity of clays	16
Low-cost membrane supports for wastewater treatment made from local clay and calcite mixtures	16
Development and Characterization of Sintered Zeolite and Zeolite-Kaolin Wick Structure for Thermosiphon Heat-Pipe Application	13
On the Unusual Temperature Dependence of Kaolinite Intercalation Capacity for N-methylformamide	13
Experimental Peloid Formulation Using a Portuguese Bentonite and Different Mineral-Medicinal Waters Suitable for Therapeutic and Well-being Purposes	12
Synthesis and Characterization of Non-leaching Inorgano- and Organo-montmorillonites and their Bactericidal Properties Against Streptococcus Mutans	12
Influence of pH on the Hydrothermal Synthesis of Al-Substituted Smectites (Saponite, Beidellite, and Nontronite)	11
Montmorillonite as an Anti-Tuberculosis Rifampicin Drug Carrier: DFT and Experimental Study	11
Rare-Earth Minerals in Kaolin Ore, Mine Tailings, and Sands – Central Georgia, Upper Coastal Plain	11
Effects of Metal-Polycation Pillaring and Exchangeable Cations on Aflatoxin Adsorption by Smectite	10
Microstructure and Time-Dependent Behavior of STx-1b Calcium Montmorillonite Suspensions	9
Composite Biodegradable Polymeric Matrix Doped With Halloysite Nanotubes for the Repair of Bone Defects in Dogs	9
Synthesis of a Composite Aerogel of Reduced Graphene Oxide Supported by Two-Dimensional Montmorillonite Nanolayers for Methylene Blue Removal	9
Adsorption Behavior of Asphaltene on Clay Minerals and Quartz in a Heavy Oil Sandstone Reservoir with Thermal Damage	8
In Memoriam: Selahattin Kadir 1956–2025	8
Gentamicin-Montmorillonite Intercalation Compounds as an Active Component of Hydroxypropylmethylcellulose Bionanocomposite Films with Antimicrobial Properties	8
Occurrence of Iron in the Minerals of Carboniferous Coal Gangue of the Pingshuo Open-pit Mine, North China	8

Determining the stoichiometric composition of Wyoming montmorillonite using improved transmission electron microscopy-energy dispersive X-ray (TEM-EDX) techniques	7
Health Protection Using Clay Minerals: A Case Study Based on the Removal of BPA and BPS from Water	7
Characterization Study of some Bauxite Deposits in Northern Brazil	7
Correction: Extraction of ⁴⁰Ar-³⁹Ar ages from a multicomponent mixture: a case study from the Tatra Mountains, Poland	7
Smectite–brine–CO₂ interactions: effects of interlayer chemistry, brine concentration, CO₂ pressure, and temperature	7
Creep Mechanical Properties and Constitutive Model of Hard Brittle Mud Shale	6
Characterization and Assessment of Natural Amazonian Clays for Cosmetics-Industry Applications	6
Molecular Dynamics Simulation of Pore-Size Effects on Gas Adsorption Kinetics in Zeolites	6
Application of an improved TEM-EDS protocol based on charge balance for accurate chemical analysis of sub-micrometric phyllosilicates in low-grade metamorphic rocks	6
Porewater Content, Pore Structure and Water Mobility in Clays and Shales from NMR Methods	6
Comparative study of the adsorption of tetracycline on clay minerals with various nanostructures: allophane, halloysite, and montmorillonite	6
Mobility of essential macro- and micro-elements in interaction between artificial sweat and potential peloids of some saline lakes in Mongolia	6
Variation in the structural order of kaolinite in regolith as an effective indicator of REE mineralization	6
Halloysite Nanotube Vehicles for Drug Delivery Through a Model Blood–Brain Barrier	5
Electrochemical Study of Methoxykaolinite Interactions with Cations and Application to Trace-Level Detection of Pb(II) in Various Aqueous Media	5
Tracing Organic-Inorganic Interactions by Light Stable Isotopes (H, Li, B, O) of an Oil-Bearing Shale and its Clay Fraction During Hydrous Pyrolysis	5
Development of a Nanostructured Film Containing Palygorskite and Dermaseptin 01 Peptide for Biotechnological Applications	5
Methods for Determination of the Layer Charge of Smectites: A Critical Assessment of Existing Approaches	5
Role of clay cation exchange capacity, location of charge, and clay mineralogy on potassium availability in Indian Vertisols	5
Thermal Analysis and Thermal Reactions of Smectites: a Review of Methodology, Mechanisms, and Kinetics	5
Preparation and Corrosive Anion-curing Capability of Layered Double Hydroxide (LDH)/Montmorillonite Composites	5
Minerals for wastewater purification: a case study	5
Ionic dissolution and structural evolution of chrysotile and lizardite at the mineral–water interface: reactions in sulfuric acid solution	5
Aflatoxin Adsorption by Natural and Heated Sepiolite and Palygorskite in Comparison with Adsorption by Smectite	5
Microscopic observations of smectite cation exchange in the absence of free water: implications for the evolution of Mars sediments	4
Unlocking the potential of V/Ti-AAC: a promising eco-friendly catalyst for cyclohexene epoxidation	4
Super-efficient Reduction of 4-nitrophenol Using Raw Pelagic Clays as Catalysts	4
Binding of DNA to Natural Sepiolite: Applications in Biotechnology and Perspectives	4
Effects of the Inclusion of Ce and Ni Species on Ti for Modification of K10-Clay by Sol-Gel and their Use as Catalysts in the Liquid-Phase Esterification Systems	4
Compressibility Behavior of Bentonites by Stern Theory based on Constant Surface Charge Conditions	4
Crystallization between (100) Goethite and (001) Orientation of Hematite – A Review	4
Aflatoxin B₁ Sorption and Safety of Dietary Sodium Bentonite in Sprague-Dawley Rats	4
Preparation and Characterization of Porous Palygorskite/Carbon Composites through Zinc Chloride Activation for Wastewater Treatment	4
Correction to: Formation of Humboldtine During the Dissolution of Hematite in Oxalic Acid – Density Functional Theory (DFT) Calculations and Experimental Verification	4
Ceramics Properties of Indurated-Shale Quarry Wastes from Abakaliki, Southeastern Nigeria: Application as Raw Materials in Roofing-Tile Production	4
Extraction of ⁴⁰Ar-³⁹Ar Ages from a Multicomponent Mixture: A Case Study From the Tatra Mountains, Poland	4
Effect of pre-treatments on analcime synthesis from abundant clay-rich illite	4
Efficacy of Two Texas Bentonites in Binding Aflatoxin B1 and in Reducing Aflatoxicosis in Broilers	3
Interfacial X-Ray Scattering From Small Surfaces: Adapting Mineral-Fluid Structure Methods for Microcrystalline Materials	3
High-temperature-resistant organoclay via quaternary ammonium salt and silane co-modification for oil-based drilling fluids	3
Synthesis and Evaluation of Betaine Copolymer Filtrate Reducer for Drilling Mud	3
Design Approaches, Functionalization, and Environmental and Analytical Applications of Magnetic Halloysite Nanotubes: A Review	3
Effect of the SiO₂/Al₂O₃ Molar Ratio on the Microstructure and Properties of Clay-based Geopolymers: A Comparative Study of Kaolinite-based and Halloysite-based Geopol	3
A New Preparation Method for cis-1,4-polyisoprene/Na-montmorillonite Latex Composites by in situ Solution Emulsification	3
Factors affecting the bleaching performance of thermally activated palygorskite and palygorskite-smectite clays from the Ventzia Basin, west Macedonia, Greece	3
Duane M. (Dewey) Moore (1933–2024)	3
Modification of the cation exchange population and CEC values of reacted bentonites of the third retrieved package of the alternative buffer material (ABM-5) experiment operated at up to 250°C	3
The Composition and Growth Mechanism of Coexisting 4M₂ and 4A₈ Biotite Polytypes from Rhyolite of Long Valley Caldera, California	3
Boron and Lithium Isotopic Signatures of Nanometer-Sized Smectite-Rich Mixed-Layers of Bentonite Beds From Campos Basin (Brazil)	3
Enhanced quality control and smectite quantification for bentonites in the Bavarian mining district based on layer charge measurement with the O-D method	3

Investigating clay swelling and permeability impairment in sandstone formations during steam flooding	3
Mobility patterns of rare earth elements in diagenetically altered vitric tuff shaped by illite-smectite	3
Aqueous Solubility of Zn Incorporated into Mg-Al-Layered Double Hydroxides	3
Mineralogy, Chemistry, and Thermal and Surface Properties of Various Technological Types of K-Bentonite from the Dolná Ves Deposit (Kremnické vrchy Mts., Western Carpathians, Slovakia)	3
Halloysite-Based Nanosystems for Biomedical Applications	3
Functional Montmorillonite/Polymer Coatings	3
Composite Nanoarchitectonics of LaNi_0.95Fe_0.05O₃/Muscovite for Enhanced Photocatalytic Activity	3
Characterization of Iron-Rich Phyllosilicates Formed at Different Fe/Si Ratios	3
Effect of a Water Phase on the Swelling Pressure and Water Retention of an Unsaturated Bentonite–Sand Mixture with Insignificant Osmotic Suction	3
Raw Materials Used in Traditional Pottery from Northern Morocco: Possible Alternative Material for a Sustainable Future in the Fran Ali Area	3
Genesis of Smectites associated with a Coal Seams Succession in the Neogene Orhaneli and Keles Coal Deposits (Bursa), NW Turkey	3
Physicochemical Variation of Clay Minerals and Enrichment of Rare Earth Elements in Regolith-hosted Deposits: Exemplification from The Bankeng Deposit in South China	2
Preparation and Properties of Antibacterial Polyhexamethylene Biguanide/Palygorskite Composites as Zearalenone Adsorbents	2
Facies, Geochemistry, and Ceramic Properties of Corumbataí Formation, Upper Permian of Paraná Basin, and its Application in the Ceramic Industry, Brazil	2
Review of the application of infrared spectroscopy in studies of acid-treated clay minerals	2
Formation of Humboldtine During the Dissolution of Hematite in Oxalic Acid – Density Functional Theory (DFT) Calculations and Experimental Verification	2
Tuning the Acidity of Montmorillonite by H₃PO₄-Activation and Supporting WO₃ for Catalytic Dehydration of Glycerol to Acrolein	2
Development of Kinetic Parameters for Nitric Acid Leaching of Phlogopite and the Characterization of Solid Products	2
Low-order kaolinite from bauxite mine tailings in the Amazon as a precursor for geopolymers: mineralogical and mechanical properties	2
Evolution of Alkali Release by an Illitic Rock for Use as Supplementary Cementitious Material	2
The role of illite in the global cycle of elements	2
Potential Uses of Local Clay Materials for the Production of Porcelain Electrical Insulators, Ethiopia	2
Enhanced Adsorption Of Humic Acid On Amino-Modified Bentonite	2
Influence of force field on clay–water contact angle determination using molecular dynamics	2
Dispersion and Swellability of Ternary Surfactant Co-Modified Montmorillonites	2
A molecular dynamics simulation study of paraquat intercalated montmorillonite	2
Synthesis of Magnetic Sulfonated Carbon/Fe₃O₄/Palygorskite Composites and Application as a Solid Acid Catalyst	2
Iron Removal from Kaolin Waste Dumps by Chemical (Oxalic and Citric Acids) and Biological (Bacillus Strain) Leaching	2
Development and characterization of organically grafted clay minerals for the removal of methylene blue from water	2
Influence of Thermal Treatment of Moroccan Red Clay on its Physicochemical and Mechanical Behavior	2
Phase-Transition Process in the Hydrothermal Zeolitization of Volcanic Ash into LTA and FAU Structures	2
Effect of temperature on the synthesis of g-C₃N₄/montmorillonite and its visible-light photocatalytic properties	2
A Review of the Reactivity of Phosphatase Controlled by Clays and Clay Minerals: Implications for Understanding Phosphorus Mineralization in Soils	2
Evaluation of the Hydraulic Conductivity of Geosynthetic Clay Liners	2