- In recent years, we have come to appreciate the astounding intricacy of the formation process of minerals from ions in aqueous solutions. In this context, a number of studies have revealed that nucleation in the calcium sulfate system is non-classical, involving the aggregation and reorganization of nanosized prenucleation particles. In a recent work we have shown that this particle-mediated nucleation pathway is actually imprinted in the resultant single micron-sized CaSO4 crystals. This property of CaSO4 minerals provides us with an unique opportunity to search for evidence of non-classical nucleation pathways in geological environments. In particular, we focused on the quintessential single crystals of anhydrite extracted from the Naica mine in Mexico. We elucidated the growth history from this mineral sample by mapping growth defects at different length scales. Based on these data we argue that the nano-scale misalignment of the structural sub-units observed in the initial calciumIn recent years, we have come to appreciate the astounding intricacy of the formation process of minerals from ions in aqueous solutions. In this context, a number of studies have revealed that nucleation in the calcium sulfate system is non-classical, involving the aggregation and reorganization of nanosized prenucleation particles. In a recent work we have shown that this particle-mediated nucleation pathway is actually imprinted in the resultant single micron-sized CaSO4 crystals. This property of CaSO4 minerals provides us with an unique opportunity to search for evidence of non-classical nucleation pathways in geological environments. In particular, we focused on the quintessential single crystals of anhydrite extracted from the Naica mine in Mexico. We elucidated the growth history from this mineral sample by mapping growth defects at different length scales. Based on these data we argue that the nano-scale misalignment of the structural sub-units observed in the initial calcium sulfate crystal seed propagate through different length-scales both in morphological, as well as strictly crystallographic aspects, eventually causing the formation of large mesostructured single crystals of anhydrite. Hence, the nanoparticle mediated nucleation mechanism introduces a 'seed of imperfection', which leads to a macroscopic single crystal, in which its fragments do not fit together at different length-scales in a self-similar manner. Consequently, anisotropic voids of various sizes are formed with very well-defined walls/edges. But, at the same time the material retains its essential single crystal nature. These findings shed new light on the longstanding concept of crystal structure.…
MetadatenAutor*innen: | Tomasz StawskiORCiD, Glen Jacob SmalesORCiD, E. Scoppola, D. Jha, L. F. G. Morales, A. Moya, R. Wirth, Brian Richard PauwORCiD, Franziska EmmerlingORCiD, A. E. S. Van Driessche |
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Dokumenttyp: | Forschungsdatensatz |
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Veröffentlichungsform: | Graue Literatur |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2021 |
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Organisationseinheit der BAM: | 6 Materialchemie |
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| 6 Materialchemie / 6.3 Strukturanalytik |
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| 6 Materialchemie / 6.5 Synthese und Streuverfahren nanostrukturierter Materialien |
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Herausgeber (Institution): | Bundesanstalt für Materialforschung und -prüfung (BAM) |
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Verlag: | Zenodo |
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Verlagsort: | Geneva |
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DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
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Freie Schlagwörter: | Anhydrite; Calcium sulfate; Mesocrystal |
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Themenfelder/Aktivitätsfelder der BAM: | Material |
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Art der Ressource: | Datensatz |
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Ort der Datenerhebung: | Berlin, Germany |
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DOI: | 10.5281/zenodo.4943234 |
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Zugehöriger Identifikator: | https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/53630 |
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Zugehöriger Identifikator: | https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/53820 |
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Beschreibung der Datei(en) : | Complete data sets: 1. DATA_SAXS_WAXS.zip - raw and reduced SAXS and WAXS measurements. NXS format and metadata. 2. M-ERSC2020110901CT.zip - raw X-ray microtomography dataset. TIFF format and metadata. 3. Video_1_CT_3D_overview_XY_rotation.avi - uncompressed video. 4. Video_2_CT_3D_overview_ZX_rotation.avi - uncompressed video. 5. Video_3_CT_3D_internal_structure_XY_rotation.avi - uncompressed video. |
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Verfügbarkeit des Dokuments: | Datei für die Öffentlichkeit verfügbar ("Open Access") |
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Lizenz (Deutsch): | Creative Commons - CC BY - Namensnennung 4.0 International |
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Datum der Freischaltung: | 22.11.2021 |
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Referierte Publikation: | Nein |
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Schriftenreihen ohne Nummerierung: | Forschungsdatensätze der BAM |
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