Tungstate Materials
A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Mineralogical Crystallography and Biomineralization".
Deadline for manuscript submissions: closed (15 August 2021) | Viewed by 2787
Special Issue Editor
Interests: solid state physics; EPR (electron paramagnetic resonance); magnetic properties of solids and magnetic measurements (SQUID); optical; infrared and XRD spectroscopy; crystallography
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Special Issue Information
Dear Colleagues,
The wolframite and scheelite structure are common structure types for ABO4 compounds. The wolframite structure may be described as made up of hexagonally close-packed oxygens with certain octahedral sites filed by A and B cations in an ordered way. The scheelite structure may be regarded as a cubic close-packed array of A2+ and BO42- ions which are ordered. The oxygens are three coordinates to cations in both the scheelite and the wolframite structure.
Tungstate materials such as BaWO4, PbWO4, CaWO4, or SrWO4 are remarkably interesting because of their applications as laser host material or scintillators. Doped wolframite and scheelite single crystals with alkali metals (Me) or rare-earth ions (Re) display the greatest possibility of further applications. Doping with trivalent ions to make them applicable requires charge compensation which may be provided, for example, by structural defects or proper co-doping with alkaline metal ions.
The doping process with different RE ions leads to different optical or magnetic properties of the doped hosts. The application of different methods may lead to different structural defects in grown crystals and changed optical and magnetic properties. Doped wolframite and scheelite single crystals (ABO4 compounds) with alkali earth metals (Me) or rare-earth ions (Re) greatly increases the further possibility of application as luminescence and solid-state laser materials.
This Special Issue is a very attractive way to publish research results related to ABO4 compounds beginning from preparations of such materials, through an investigation of their properties: magnetic, optical, laser action, and so on, and, finally, to the applications their compounds in different areas. The Special Issue is the perfect place to publish both theoretical and experimentally papers focused on wolframite and scheelite structure (ABO4 compounds) doped and co-doped with alkali metals (Me) and/or rare-earth ions (Re), which are of great importance today and will have even greater significance in the future.
Prof. Dr. Tomasz Bodziony
Guest Editor
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Keywords
- Scheelite
- Wolframite
- ABO4
- Rare-earth ions
- Transition metal ions
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