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Crystals publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Physical and Chemical Nature of Cemented Carbides

edited by

Marco Ruiz-Esparza-Rodríguez

and

Kai Guan

submission deadline 20 Jun 2026 | Viewed by 73 | Submission Open

Keywords: high-entropy alloys (HEAs); cemented carbides; mechanical milling; sintering techniques (SPS/HIP); microstructural characterization

(This special issue belongs to the Section Crystalline Metals and Alloys)

Electrode Materials in Lithium-Ion Batteries

edited by Zhongren Zhou

submission deadline 25 Jun 2026 | 2 articles | Viewed by 3766 | Submission Open

Keywords: lithium-ion battery; positive-electrode material; negative-electrode material; new electrode material; electrochemical performance; lithium storage performance; lithium iron phosphate; lithium nickel– manganese– cobalt oxide; silicon-based material; lithium manganese oxide; molten salt electrochemistry; solid waste resources recovery

(This special issue belongs to the Section Materials for Energy Applications)

Modified Semiconductors: Synthesis, Structure and Advanced Applications

edited by Nivaldo Freire Andrade Neto

submission deadline 25 Jun 2026 | Viewed by 180 | Submission Open

Keywords: nanomaterials and nanotechnology; semiconductors; photocatalytic applications; electrochemical applications; crystallography; spectroscopy

(This special issue belongs to the Section Inorganic Crystalline Materials)

Recent Research on Piezoelectric Ceramics

edited by Nengneng Luo,

Junjun Wang

, Xudong Qi, Linjing Liu,

Jie Wu

and Kai Li

submission deadline 29 Jun 2026 | Viewed by 128 | Submission Open

Keywords: piezoelectric ceramics; manufacture technologies; piezoelectricity; defect; grain

(This special issue belongs to the Section Polycrystalline Ceramics)

Co-Crystals and Polymorphic Transition in Energetic Materials

edited by

Yapeng Ou

Tao Yan

and

Siwei Song

submission deadline 30 Jun 2026 | 6 articles | Viewed by 22081 | Submission Open

Keywords: energetic co-crystals; crystal phases control; polymorphic transition inhibition; crystal structure prediction

(This special issue belongs to the Section Crystal Engineering)

Metal–Organic Complexes for Synthesis

edited by

Yan Liu

and

Bing Yu

submission deadline 30 Jun 2026 | Viewed by 150 | Submission Open

Keywords: metal– organic complexes; photocatalysis; organic synthesis; photothermal reactions; enzyme mimic catalysis; synthetic methodology; homogeneous catalysis; heterogeneous catalysis; electrocatalysis; cooperative catalysis; gas conversion; metal– organic frameworks (MOFs); nanoenzymes; plastic recycling; polymer engineering

(This special issue belongs to the Section Organic Crystalline Materials)

Thermal Coatings: Properties and Applications

edited by Dorin Luca and

Corneliu Munteanu

submission deadline 30 Jun 2026 | Viewed by 139 | Submission Open

Keywords: flame spraying; high-velocity oxygen fuel; high-velocity air fuel; detonation gun spraying; arc spraying; plasma jet deposition

(This special issue belongs to the Section Crystalline Metals and Alloys)

MXenes: From Synthesis to Applications

edited by

Zhifang Liu

and

Hanqi Feng

submission deadline 30 Jun 2026 | Viewed by 97 | Submission Open

Keywords: MXenes; two-dimensional materials; surface engineering; energy storage and conversion; electromagnetic interference shielding; terahertz absorption

(This special issue belongs to the Section Inorganic Crystalline Materials)

Investigation of Microstructural and Properties of Steels and Alloys

edited by

Saurabh Tiwari

and

Marek Sroka

submission deadline 10 Jul 2026 | 5 articles | Viewed by 2948 | Submission Open

Keywords: high-temperature alloys; Ni-/Co-based superalloys; steels; alloy design; nanomaterials; structure-property relationships; advanced microscopy; machine learning in materials science

(This special issue belongs to the Section Crystalline Metals and Alloys)

Metal Complexes: Synthesis, Structure, and Biological Activity

edited by

Ana Kesic

and Jovana V. Bogojeski

submission deadline 10 Jul 2026 | Viewed by 138 | Submission Open

Keywords: coordination compounds; transition metal complexes; N-; O-; S-donor ligands; spectroscopic characterization; X-ray crystallography / crystal structure; thermodynamic and kinetic studies; stability and reactivity; DNA and protein interactions; cytotoxicity and antitumor activity; antimicrobial activity

(This special issue belongs to the Section Crystal Engineering)

Key Crystal Materials for Optoelectronic Devices: Structure Regulation, Performance Optimization, and Device Applications

edited by Penghui He and

Lin Gan

submission deadline 10 Jul 2026 | Viewed by 76 | Submission Open

Keywords: crystal growth and defect engineering; optoelectronic property tuning; structure– performance relationships; high-efficiency photonic devices; emerging crystalline materials

(This special issue belongs to the Section Inorganic Crystalline Materials)

Advanced Research on Ferroelectric Materials

edited by Tianyu Li and

Liqiang He

submission deadline 10 Jul 2026 | Viewed by 61 | Submission Open

Keywords: ferroelectrics; dielectrics; piezoelectrics; polarization; ferroelectric domain; lattice structure; electronic structure; thin film; ceramic; device

(This special issue belongs to the Section Inorganic Crystalline Materials)

Research Progress of Photoluminescent Materials

edited by Lei Han

submission deadline 15 Jul 2026 | 5 articles | Viewed by 9135 | Submission Open

Keywords: photoluminescence; luminescent materials; optoelectronic devices; advanced photonic applications; optoelectronics and photonics

(This special issue belongs to the Section Inorganic Crystalline Materials)

Graphene-Related and Graphene-Like Reinforcements in Composites: Manufacturing and Applications

edited by

Daniel Salvi

and Silvia Vesco

submission deadline 15 Jul 2026 | Viewed by 357 | Submission Open

Keywords: two-dimensional materials; polymer composites; metal matrix composites; coatings; particle reinforcement; green manufacturing; lightweighting; wear resistance; mechanical performances; conductivity

Structure and Characterization of Enzymes

edited by

Jung-Min Choi

submission deadline 17 Jul 2026 | 1 articles | Viewed by 984 | Submission Open

Keywords: enzyme structure; biocatalysis; structure– function relationship; X-ray crystallography; artificial intelligence in structural biology

Analysis of Halogen and Other σ-Hole Bonds in Crystals (2nd Edition)

edited by

Jane S. Murray

submission deadline 20 Jul 2026 | 5 articles | Viewed by 4914 | Submission Open

Keywords: halogen bonding; sigma-hole bonding; electrostatic potentials; nature of noncovalent interactions

(This special issue belongs to the Section Crystal Engineering)

Microstructure Analysis, Phase Composition and Properties of Metal

edited by

Mehmet Erdi Korkmaz

submission deadline 20 Jul 2026 | 1 articles | Viewed by 430 | Submission Open

Keywords: advanced characterization of metallic alloy microstructures (SEM; TEM; EBSD; XRD; etc.); phase transformations and kinetics in metals; relationships between microstructural and mechanical properties; heat treatment; thermomechanical processing; and surface modification; modeling and simulation of microstructural evolution; correlation of crystal structure and anisotropy with physical properties; metallic behavior under extreme environments (e.g.; cryogenic; high temperature; and corrosive); novel alloying concepts and high-performance steel grades (e.g.; AHSS; TRIP; TWIP; and maraging)

(This special issue belongs to the Section Crystalline Metals and Alloys)

Recent Advances in Photocatalytic Materials

edited by Yingchun Li and

Gururaj M. Neelgund

submission deadline 20 Jul 2026 | Viewed by 125 | Submission Open

Keywords: photocatalyst; photocatalysis; photocatalytic reduction of carbon dioxide; photocatalytic splitting water; photocatalytic degradation; photocatalytic self-cleaning

(This special issue belongs to the Section Materials for Energy Applications)

Synthesis and Characterization of Ceramics and Ceramic-Based Composites

edited by

Milica Posarac-Markovic

submission deadline 20 Jul 2026 | Viewed by 114 | Submission Open

Keywords: ceramics; crystalline structure; characterization methods; sintering; microstructure; ceramic-based composites

(This special issue belongs to the Section Polycrystalline Ceramics)

Crystallographic and Molecular Approaches in Drug Design and Development

edited by

Mouad Lahyaoui

, Nada Kheira Sebbar and Riham Sghyar

submission deadline 20 Jul 2026 | Viewed by 85 | Submission Open

Keywords: organic synthesis; medicinal chemistry; bioactive organic compounds; structure– activity relationships; molecular design; solid-state properties; QSAR/QSPR

(This special issue belongs to the Section Biomolecular Crystals)

In Situ Study of Mineralogy, Gemology, and Geochemistry and Advances in Gem Resource Exploration

edited by Ying Guo and

Qingfeng Guo

submission deadline 30 Jul 2026 | Viewed by 165 | Submission Open

Keywords: crystal in situ; mineral crystallography; gemological quality evaluation; geochronology of gemstones; geological setting; geographic origin; gemstone characterization; genesis of gemstones; museum-collected mineral samples

(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)

Design and Development of Silicon Heterostructures for Electronics and Photonics

edited by Abel Garzón Román, Carlos Zúñiga Islas, Sergio Alberto Gamboa Sánchez and

María Eugenia Rabanal Jiménez

submission deadline 31 Jul 2026 | Viewed by 136 | Submission Open

Keywords: crystals; semiconductors; superconductors; characterization techniques; heterostructures; electronics; and photonics application; organic or inorganic materials; growth; deposit; experimental or computational results

(This special issue belongs to the Section Materials for Energy Applications)

Electron Microscopy of Semiconductor and Magnetic Materials

edited by Sangmoon Yoon

submission deadline 31 Jul 2026 | Viewed by 29 | Submission Open

Keywords: electron microscopy; semiconductor materials; magnetic materials; structure– property relationships; in situ/operando characterization

(This special issue belongs to the Section Inorganic Crystalline Materials)

Performance and Processing of Metal Materials

edited by Zhanfeng Wang and Benilde F. O. Costa

submission deadline 10 Aug 2026 | 3 articles | Viewed by 3472 | Submission Open

Keywords: metal materials; high-performance alloys; advanced processing techniques; material behavior modeling; mechanical properties

(This special issue belongs to the Section Crystalline Metals and Alloys)

Synergizing Crystallography, Mineral Materials Science and Solid Waste Upcycling for Sustainable Materials Innovation

edited by Limei Wu, Xin Liu and

Qingfeng Guo

submission deadline 15 Aug 2026 | 3 articles | Viewed by 724 | Submission Open

Keywords: mineral crystallography; mineral materials; solid waste valorization; AI-driven material design

Metal Oxide-Based Nanomaterials: Advances in Synthesis, Characterization, and Applications

edited by

Jorge Manuel Silva-Jara

Diego Eloyr Navarro-López

Luis Miguel Anaya-Esparza

and Miguel Angel López-Alvarez

submission deadline 20 Aug 2026 | 2 articles | Viewed by 7711 | Submission Open

Keywords: metal-oxide-based nanomaterials; nanocrystals; synthesis techniques; characterization; environmental remediation; catalysis; biomedical applications; green synthesis; toxicity assessment; sustainability; interdisciplinary research; machine learning; innovative research; environmental monitoring; drug delivery; life cycle analysis

(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)

Recent Advances in Scintillator Materials

edited by

Yuriy Zorenko

submission deadline 20 Aug 2026 | 1 articles | Viewed by 1431 | Submission Open

Keywords: scintillators; crystals; films; ceramics; nanopowders; melt growth; liquid-phase epitaxy; and solid-state reactions; luminescence; energy transfer processes; defects; dopants

(This special issue belongs to the Section Inorganic Crystalline Materials)

Research on Liquid Crystal Materials and Optical Devices

edited by

Pedro Marques de Almeida

and

Juliana Eccher

submission deadline 20 Aug 2026 | Viewed by 258 | Submission Open

Keywords: columnar liquid crystals; self-organizing; optical devices; planar and homeotropic alignment; organic electronics; semiconducting nanoparticles; solar cells; oleds; transistors; displays

(This special issue belongs to the Section Liquid Crystals)

Recent Advances in Graphene and Other Two-Dimensional Materials (2nd Edition)

edited by

Grazia Giuseppina Politano

and

John Parthenios

submission deadline 20 Aug 2026 | Viewed by 145 | Submission Open

Keywords: two-dimensional materials; two-dimensional material based membranes; graphene; graphene oxide; transition metal dichalcogenides (TMDCs); graphene-based composites; two-dimensional advanced devices and applications; functionalization of graphene; characterization techniques: electrical; electronic; optical; and mechanical properties

(This special issue belongs to the Section Inorganic Crystalline Materials)

Graphene-Based Nanocomposites

edited by

Zhao-Chi Chen

and Tien-Li Chang

submission deadline 20 Aug 2026 | Viewed by 130 | Submission Open

Keywords: graphene nanocomposites; 2D materials; functionalization and defect engineering; laser/photonic processing; additive manufacturing; flexible/wearable sensors; energy storage and conversion; electro/photocatalysis; in situ/operando characterization; machine learning guided materials design

(This special issue belongs to the Section Polycrystalline Ceramics)

Crystallography of Enzymes (2nd Edition)

edited by

Bo Liang

and

Houfu Guo

submission deadline 20 Aug 2026 | Viewed by 118 | Submission Open

Keywords: enzyme structure and function; X-ray and serial crystallography; de novo enzyme design; ancestral reconstruction; protein engineering; catalytic mechanism; structural dynamics; substrate and inhibitor interactions; computational modeling

(This special issue belongs to the Section Biomolecular Crystals)

Crystallization and Precipitation in Life-Science, (Bio)polymer and Recycling Industries

edited by

Heike Lorenz

Erik Temmel

and Vico Tenberg

submission deadline 20 Aug 2026 | Viewed by 87 | Submission Open

Keywords: phase equilibria; recycling processes; circular economy; biopolymer processing and valorization; sustainable process engineering; innovative crystallization and precipitation process concepts; industrial applications

(This special issue belongs to the Section Industrial Crystallization)

Perovskite Materials: Structure, Properties and Applications

edited by Xiangqian Shen, Hua Zhou and

Heinz Christoph Neitzert

submission deadline 20 Aug 2026 | Viewed by 74 | Submission Open

Keywords: perovskite photoelectric devices; material engineering; scalable manufacturing; clean energy; environmental sustainability

(This special issue belongs to the Section Materials for Energy Applications)

Modern Gem Crystals: Synthesis, Characterization, Genesis and Intelligent Analysis

edited by

Ye Yuan

Guanghai Shi

and

Fei Liu

submission deadline 31 Aug 2026 | Viewed by 207 | Submission Open

Keywords: gemology; mineralogy; geographic-origin determination; spectroscopy; synthetic gemstones; treatment detection; artificial intelligence (AI) in gemology; digitalization; non-destructive testing

(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)

Microstructure and Properties of Steel Materials

edited by

Shilong Liu

Yishuang Yu

, Qizhe Ye and

Yangxin Wang

submission deadline 31 Aug 2026 | Viewed by 137 | Submission Open

Keywords: steel; microstructure; phase transformation; mechanical properties; corrosion; hydrogen embrittlement; materials processing; additive manufacturing; machine learning

(This special issue belongs to the Section Crystalline Metals and Alloys)

Functional Nanomaterials for Electrochemical Sensing and Energy Storage

edited by

Justina Gaidukevic

and

Ruta Rasike

submission deadline 31 Aug 2026 | Viewed by 73 | Submission Open

Keywords: graphene-based materials; layered double hydroxide (LDH); conductive polymers; hybrid nanocomposites; electrochemical sensing; energy storage

(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)

Synthesis and Crystal Structures of Novel Solid-State Materials and Their Applications

edited by

Silvana Moris López

and Patricia Barahona

submission deadline 10 Sep 2026 | Viewed by 42 | Submission Open

Keywords: solid-state synthesis; crystalline materials; structural characterization; structure– property relationships; application of solid-state materials

(This special issue belongs to the Section Inorganic Crystalline Materials)

Heterocyclic Compounds in Drug Discovery: Synthesis, X-Ray Crystal Structures, Applications and Computational Approaches

edited by

Mohammed Chalkha

and

Mohamed Bakhouch

submission deadline 20 Sep 2026 | Viewed by 211 | Submission Open

Keywords: heterocyclic compounds; synthetic methodologies; structural characterization; X-ray crystallography studies; biological properties; computational chemistry

(This special issue belongs to the Section Biomolecular Crystals)

Crystal Scintillator as Radiation Detector

edited by

Riccardo Cerulli

and

Alice Leoncini

submission deadline 30 Sep 2026 | Viewed by 24 | Submission Open

Keywords: crystal scintillator; radiation detectors; crystal growth and characterization; scintillation properties; low-background detectors; particle and astroparticle physics; medical and imaging application

(This special issue belongs to the Section Inorganic Crystalline Materials)

Applications of Additive Manufacturing and Numerical Simulation in High-Performance Metallic Materials

edited by Yunwei Gui and

Umberto Prisco

submission deadline 20 Oct 2026 | Viewed by 103 | Submission Open

Keywords: additive manufacturing; numerical simulation; high-performance metals; multi-physics modeling; experimental validation; process-microstructure-property relationships; topology optimization; residual stress; digital twin; powder bed fusion

(This special issue belongs to the Section Crystalline Metals and Alloys)

Crystals: 15th Anniversary

edited by

Alessandra Toncelli

Jesús Sanmartín-Matalobos

José Gavira

and

Heike Lorenz

submission deadline 31 Dec 2026 | Viewed by 124 | Submission Open

Keywords: crystals; crystal growth; characterization techniques; crystalline; structure properties and applications of crystalline materials

Applications of Crystalline Materials in Elastocaloric Devices

edited by

Claudia Masselli

Adriana Greco

and

Luca Cirillo

submission deadline 31 Dec 2026 | Viewed by 103 | Submission Open

Keywords: elastocaloric; shape memory alloys; austenite– martensite transformations; solid-state cooling; solid-state heat pumping

(This special issue belongs to the Section Materials for Energy Applications)

Advances in Optoelectronic Materials

edited by Mourad Boutahir and El Mehdi El Khattabi

submission deadline 31 Dec 2026 | Viewed by 88 | Submission Open

Keywords: two-dimensional materials; DFT; CVD

(This special issue belongs to the Section Materials for Energy Applications)

Research in Magnesium-Based Alloys

edited by Shifeng Luo,

Xinyu Yang

, Yan Wang and Xiao Lei

submission deadline 31 Dec 2026 | Viewed by 72 | Submission Open

Keywords: high-strength Mg alloys; thermal conductivity; texture; heterogeneous structure; LPSO phase; hot extrusion; dynamic recrystallization; creep

(This special issue belongs to the Section Crystalline Metals and Alloys)

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