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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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Microstructure, Properties and Characterization of Aluminum Alloys

edited by

Kai Wang

and

Heinz-Günter Brokmeier

submission deadline 20 Dec 2026 | 2 articles | Viewed by 2478 | Submission Open

Keywords: aluminum alloys; microstructure evolution; mechanical properties; corrosion resistance; precipitation strengthening; advanced characterization; additive manufacturing; thermomechanical processing; phase transformation; structure–property relationships

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

Electrochemical Preparation of Magnetic Materials

edited by Milica Spasojević Savković and

Milentije Luković

submission deadline 20 Dec 2026 | Viewed by 1719 | Submission Open

Keywords: electrodeposition; magnetization; electric properties; energy storage; electrochemistry

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

Advanced Catalytic Materials in Energy and Environment

edited by Wanliang Yang

submission deadline 20 Dec 2026 | 2 articles | Viewed by 1606 | Submission Open

Keywords: crystalline catalysts; crystal facet; defect engineering; in situ XRD; CO2 reduction; water splitting; photocatalysis; electrocatalysis; perovskite; MOF

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

Polymeric Materials for Sustainable Catalysis and Energy Applications

edited by Salvatore Impemba,

Antonio Buonerba

Olga Sacco

and

Marco Bellini

submission deadline 20 Dec 2026 | 1 articles | Viewed by 1366 | Submission Open

Keywords: polymer; catalyst; biomass; energy; hydrogen; nanoparticles; electrocatalysis

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

Advances in Processing, Simulation and Characterization of Alloys (2nd Edition)

edited by

Shuyan Zhang

Pan Gong

, Fuyu Dong and

Shouxun Ji

submission deadline 20 Dec 2026 | 1 articles | Viewed by 1327 | Submission Open

Keywords: alloy design; process optimization; heat treatments; phase transformations; mechanical, anti-corrosion, soft magnetic and other properties; microstructural characterization; modeling and simulation; Finite Element Analysis (FEA)

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

Advances in the Growth and Application of Nitride Crystals

edited by

Yongzhong Wu

submission deadline 20 Dec 2026 | 1 articles | Viewed by 1083 | Submission Open

Keywords: gallium nitride; aluminum nitride; boron nitride; crystal growth; substrate processing; hydride vapor phase epitaxy; flux method; high-pressure ammonothermal method; physical vapor transport; chemical mechanical polishing

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

Raman Spectroscopy and Crystals: Classical Methods Bridging Modern Benchmarks

edited by

Michele Cassetta

and Gino Mariotto

submission deadline 20 Dec 2026 | 1 articles | Viewed by 684 | Submission Open

Keywords: Raman spectroscopy; crystalline materials; crystal structure; advanced characterization; ceramics; glass–ceramics; polymers; materials science

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

Preparation and Performance Research of Piezoelectric Ceramics

edited by

Yalin Qin

and Yongcheng Zhang

submission deadline 20 Dec 2026 | Viewed by 260 | Submission Open

Keywords: piezoelectric ceramics; ferroelectric materials; lead-free piezoelectrics; material synthesis; sintering; structure-property relationships; electromechanical properties; actuators and sensors

(This special issue belongs to the Section Polycrystalline Ceramics)

Adsorption and Photocatalytic Materials for Environmental Remediation

edited by Ruimeng Wang, Jianmin Chen and

Claudia Graiff

submission deadline 20 Dec 2026 | Viewed by 184 | Submission Open

Keywords: advanced functional materials; adsorption; photocatalysis; mechanistic studies; scalable manufacturing; environmental remediation

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

Laser Metal Additive Manufacturing and Laser Welding Processes

edited by

Shuang Su

Peng Du

and

Hongxian Shen

submission deadline 20 Dec 2026 | Viewed by 168 | Submission Open

Keywords: additive manufacturing; welding processes; microstructure optimization; mechanical properties; medium/high-entropy alloys; superalloys; defect control

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

Crystallization of High-Performance Metallic Materials (3rd Edition)

edited by

Wangzhong Mu

and

Chao Chen

submission deadline 30 Dec 2026 | 4 articles | Viewed by 3544 | Submission Open

Keywords: solidification of steel and alloys; casting process; solid phase transformation; high-performance metallic materials; in situ characterization; nucleation and growth in metals; inclusion/precipitate engineering in steel and alloys; slag and flux engineering; thermodynamics and kinetics of crystallization; process–structure–property correlation in alloys

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

Crystallographic and Molecular Approaches in Drug Design and Development

edited by

Mouad Lahyaoui

, Nada Kheira Sebbar and Riham Sghyar

submission deadline 30 Dec 2026 | Viewed by 446 | 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)

Advances in Optoelectronic Materials

edited by Mourad Boutahir and El Mehdi El Khattabi

submission deadline 31 Dec 2026 | 4 articles | Viewed by 3810 | Submission Open

Keywords: two-dimensional materials; DFT; CVD

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

Applications of Crystalline Materials in Elastocaloric Devices

edited by

Claudia Masselli

Adriana Greco

and

Luca Cirillo

submission deadline 31 Dec 2026 | 2 articles | Viewed by 2280 | 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)

Crystals: 15th Anniversary

edited by

Alessandra Toncelli

Jesús Sanmartín-Matalobos

José Gavira

and

Heike Lorenz

submission deadline 31 Dec 2026 | Viewed by 576 | Submission Open

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

Selected Papers from the 5th International Online Conference on Crystals

edited by

Stanislav Ferdov

and

Shouxun Ji

submission deadline 31 Dec 2026 | Viewed by 369 | Submission Open

Keywords: inorganic crystalline materials; liquid crystals; organic crystalline materials; hybrid and composite crystalline materials; materials for energy applications; crystal engineering; crystalline metals and alloys

Feature Papers on “Hybrid and Composite Crystalline Materials” 2026

edited by

Leonid M. Kustov

submission deadline 31 Dec 2026 | Viewed by 285 | Submission Open

Keywords: hybrid materials; composite materials; intermolecular interactions; molecular crystals; coordination polymers; metal–organic frameworks; covalent organic frameworks; hierarchical zeolites; zeolite-like materials; organic–inorganic hybrids; graphene; carbon nitride; layered sulfides; metal nanoparticles; metal oxide nanoparticles; metal chalcogenide nanoparticles; metal pnictide nanoparticles; MXenes

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

Research in Magnesium-Based Alloys

edited by Shifeng Luo,

Xinyu Yang

, Yan Wang and Xiao Lei

submission deadline 31 Dec 2026 | Viewed by 283 | 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)

Research on Biomedical Alloys, Biocompatible and Biodegradable Alloys

edited by

Bogdan Istrate

submission deadline 31 Dec 2026 | Viewed by 261 | Submission Open

Keywords: microstructure; corrosion; in vitro/in vivo analysis; biocompatible; biodegradable alloys

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

Advanced Crystalline and Nanoscale Materials for Electronic and Optoelectronic Applications

edited by

Kuan-Wei Lee

Chien-Jung Huang

and Zaved Hossain Khan

submission deadline 31 Dec 2026 | Viewed by 218 | Submission Open

Keywords: crystalline; nanoscale; electronic; optoelectronic

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

Microstructure and Mechanical Properties of Dissimilar Material Joints

edited by Xiajun Guo,

Bo Yang

, Chenghao Zhang, Jun Jin,

Xincheng Wang

and

Marek Sroka

submission deadline 10 Jan 2027 | Viewed by 83 | Submission Open

Keywords: welding and joining; dissimilar materials joining; brazing; mechanical properties; interfacial microstructure; ceramic; alloys

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

Scintillator Crystals: Structure, Characterization and Scintillation Models

edited by

Lian Sun

and

Leilei Zhang

submission deadline 10 Jan 2027 | Viewed by 54 | Submission Open

Keywords: scintillator crystals; inorganic scintillator; organic scintillator; hybrid scintillator; nano-scintillator; crystal structure; defect engineering; carrier dynamics; kinetic modeling

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

Crystal Structure and Characterization of Minerals and Related Nanomaterials

edited by

Milena Rosić

submission deadline 20 Jan 2027 | 3 articles | Viewed by 3610 | Submission Open

Keywords: mineral, crystal, crystal structure; new mineral species and mineral groups; crystal chemistry and properties of minerals and related nanomaterials; chemical variability; homogeneity; advanced minerals and nanomaterials characterization

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

Advances in Scintillators: Luminescence Properties and Applications

edited by

Stratos David

and

Luigi Montalto

submission deadline 20 Jan 2027 | 1 articles | Viewed by 1408 | Submission Open

Keywords: scintillator crystals; inorganic scintillators; co-doped scintillators; mixed scintillators; hybrid scintillator materials (inorganic/organic); medical imaging; nuclear imaging detectors

Advances in Medium/High-Entropy Materials

edited by Zhipeng Wang, Yuanyuan Tian and Yang Chen

submission deadline 20 Jan 2027 | Viewed by 116 | Submission Open

Keywords: medium-entropy materials; high-entropy materials; materials design; structure–property relationships; high-temperature stability; corrosion resistance; electrocatalysis; energy storage; computational materials science; machine learning

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

The Development and Application of Laser Material Processing

edited by Daniel Fernández-González and

Cristian Gómez Rodríguez

submission deadline 20 Jan 2027 | Viewed by 67 | Submission Open

Keywords: ceramic matrix composites; three-dimensional structures; metal matrix composites; polymer based materials; laser material processing; selective laser sintering (SLS); additive manufacturing; laser–material interaction; surface engineering; process optimization; advanced manufacturing technologies

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

Processing, Microstructure, and Properties of Metals

edited by Liang Huang, Lihong Jiang,

Mingjie Zhao

and Siliang Yan

submission deadline 20 Jan 2027 | Viewed by 24 | Submission Open

Keywords: advanced processing techniques; microstructural characterization; mechanical properties; constitutive model; phase transformation; strengthening mechanisms; computational modeling

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

Feature Papers on “Inorganic Crystalline Materials”

edited by

Thomas Schleid

submission deadline 20 Jan 2027 | Viewed by 1 | Submission Open

Keywords: semiconductors; superconductors; ion conductors; magnets; photonic; optical; NLO; LASER and ferroic crystals; phosphors and scintillators; catalysts

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

Novel Functional Crystalline Materials for Energy Conversion and Sensing

edited by

Alessandro Bellucci

submission deadline 21 Jan 2027 | Viewed by 393 | Submission Open

Keywords: functional crystalline materials; energy conversion; sensing materials; photovoltaic and photocatalysis systems; thermoelectric and thermionic materials; piezoelectric crystals; crystal growth and design; low-dimensional crystalline systems; hybrid crystalline materials; computational materials science

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

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

edited by Penghui He and

Lin Gan

submission deadline 10 Feb 2027 | Viewed by 381 | 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)

Recent Research on Piezoelectric Ceramics

edited by Nengneng Luo,

Junjun Wang

, Xudong Qi, Linjing Liu,

Jie Wu

and Kai Li

submission deadline 19 Feb 2027 | 2 articles | Viewed by 3216 | Submission Open

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

(This special issue belongs to the Section Polycrystalline Ceramics)

Advanced Research on Ferroelectric Materials

edited by Tianyu Li and

Liqiang He

submission deadline 20 Feb 2027 | 1 articles | Viewed by 705 | 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)

Photocatalytic and Electrocatalytic Properties and Mechanisms of Crystal Catalytic Materials

edited by

Xian Liu

, Shiwei Xie and

Leonid M. Kustov

submission deadline 20 Feb 2027 | Viewed by 107 | Submission Open

Keywords: crystal catalytic materials; photocatalysis; electrocatalysis; catalytic mechanism; crystal structure; defect engineering; band structure regulation; DFT simulation; catalytic performance

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

Advances in Photovoltaic Materials: Synthesis, Properties and Applications

edited by Yuancai Gong, Kunal J. Tiwari, Outman El Khouja, Ivan Caño Prades and

Alex Jimenez-Arguijo

submission deadline 20 Feb 2027 | Viewed by 91 | Submission Open

Keywords: photovoltaic materials; thin-film solar cells; crystal growth and synthesis; defect engineering; interface and contact engineering; kesterite and chalcogenide semiconductors; emerging solar cell technologies

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

MXenes: From Synthesis to Applications

edited by

Zhifang Liu

and

Hanqi Feng

submission deadline 25 Feb 2027 | Viewed by 334 | 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)

Metal Complexes: Synthesis, Structure, and Biological Activity

edited by

Ana Kesic

and Jovana V. Bogojeski

submission deadline 20 Mar 2027 | Viewed by 403 | 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)

Advances in Additive Manufacturing of Crystalline Materials

edited by Moshen Saboktakin Rizi and

Hossein Minouei

submission deadline 20 Mar 2027 | Viewed by 183 | Submission Open

Keywords: additive manufacturing; 3D printing; powder bed fusion; directed energy deposition; crystalline materials; microstructure–property relationships; solidification; crystallographic texture; defect control; post-processing

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

Sustainable Hydrometallurgical Recycling from Spent Lithium-Ion Batteries and Industrial Solid Wastes

edited by Chunli Liu

submission deadline 31 Mar 2027 | Viewed by 23 | Submission Open

Keywords: spent lithium-ion battery; coal fly ash; industrial solid waste; lithium extraction solid residue; resources recovery; hydrometallurgy

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

Advanced Additive Manufacturing of Biomaterials and Medical Devices

edited by Onur Ertugrul

submission deadline 20 Apr 2027 | Viewed by 49 | Submission Open

Keywords: additive manufacturing; biomaterials; medical devices; biomedical implants; bioprinting; tissue engineering; metallic biomaterials; polymeric biomaterials; biodegradable materials; lattice structures

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

Recent Advances in Bio-Inspired and Biomimetic Materials

edited by

Kun Wang

submission deadline 20 May 2027 | Viewed by 102 | Submission Open

Keywords: bioinspired materials; biostructures; biomimetic materials; biomineralization; self-assembly; hierarchical structures; enamel-like nanocomposites; calcium-based minerals; mussel-inspired adhesion; bio-inspired fabrication; bioprocessing-inspired fabrication; bioprocessing-inspired synthesis; structures and functions; biomineralization-inspired synthesis; photosynthesis-inspired synthesis; additive manufacturing; microscale additive manufacturing; nanoscale additive manufacturing; biomineralization of collagen fibrils; kinetics of mineral deposition; artificial mineralization; natural living organism-directed synthesis; protein- or organism-induced synthesis; physiological processes; sustainable material synthesis

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

Innovative Functional Materials for Intelligent Sensing Technologies

edited by

Valentine Saasa

, Bonex Mwakikunga and

Kgotla Katlego Masibi

submission deadline 31 Jul 2027 | Viewed by 151 | Submission Open

Keywords: functional materials; intelligent sensing technologies; flexible electronics; point-of-care diagnostics; chemical sensing; semiconducting metal oxide gas sensors; wearable sensors; flexible electronics; electrochemical sensors; gas sensors; biosensors

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

Intelligent Manufacturing of Metal and Ceramic Materials

edited by

Xiaoming Sun

and Mina Zhang

submission deadline 31 Dec 2027 | Viewed by 48 | Submission Open

Keywords: intelligent manufacturing; additive manufacturing; multifunctional metal; advanced ceramics; wire arc additive manufacturing (WAAM); selective laser melting (SLM)

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

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