Synthesis of new cuprate’s through high pressure chemical vapour transport

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dc.contributor.authorSpasovski, Men_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorSoehnel, Ten_AU
dc.date.accessioned2023-06-05T05:33:32Zen_AU
dc.date.available2023-06-05T05:33:32Zen_AU
dc.date.issued2020-11-11en_AU
dc.date.statistics2023-05-05en_AU
dc.description.abstractChemical vapour transport (CVT) reactions has allowed for the growth of many inorganic single crystals which would be difficult or completely impossible to grow using alternative methods like flux related methods or from congruent melt. Most CVT reactions are done in evacuated and sealed quartz tubes where the internal pressure is typically in the range from 1 to 1^10-3¬ bar where diffusion is the dominant contributor to transport kinetics.[1] Diffusion limited transport is preferred over convective transport because it minimises nucleation, favouring the growth of larger single crystals with fewer defects. Many metal oxides are simply not thermodynamically stable under these conditions making it difficult to transport and crystallise the desired phase or composition. We have found this to be the case for many cuprates with the braunite, parwelite and various Cu3TeO6 related structures. To circumvent this limitation we have explored the unconventional high pressure CVT (HPCVT) method. As a result of these experiments we have been able to successfully grow and solve the structures of single crystals of new polymorphs and structures, this includes Cu5Sb2SiO12, Cu4MnSb2SiO12, Cu2GaSbO6 and Cu3Ga3SbSiO12. Samples have been characterised by X-ray and neutron diffraction and magnetic susceptibility measurements. These structures exhibit exotic gallium and copper coordination environments making them suitable candidates for studying various magnetic phenomena. HPCVT is a useful method not only for the growth of new inorganic compounds but also as an alternative, environmentally friendly method for growing known structures. Under pressure, water seems to be a major contributor to the transport reaction making it possible to grow samples without a reliance on halogens or commonly used salts like HgBr or TeCl4. Since the transport rates are high as a result of greater convective currents, a significantly smaller temperature gradient is necessary to conduct the experiments making much simpler experimental designs possible and accessible without the need for multi-zone furnaces. © The authors.en_AU
dc.identifier.citationSpasovski, M., Avdeev, M., & Soehnel, T. (2020). Synthesis of new cuprate’s through high pressure chemical vapour transport. Paper presented to the ANBUG-AINSE Neutron Scattering Symposium, AANSS 2020, Virtual Meeting, 11th - 13th November 2020, (pp. 112). Retrieved from: https://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.conferenceenddate13 November 2020en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2020en_AU
dc.identifier.conferenceplaceVirtual Meetingen_AU
dc.identifier.conferencestartdate11 November 2020en_AU
dc.identifier.pagination112en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/125/contributions/3916/contribution.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15047en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.subjectMonocrystalsen_AU
dc.subjectKineticsen_AU
dc.subjectOxidesen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectFurnacesen_AU
dc.subjectHalogensen_AU
dc.titleSynthesis of new cuprate’s through high pressure chemical vapour transporten_AU
dc.typeConference Abstracten_AU
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