Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Transition-metal incorporation and Co-Sr/Mn-Sr mixed-modifier effect in metaphosphate glasses
Δημιουργός/Συγγραφέας:	Griebenow K. Hoppe U. Möncke D. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Wondraczek L.
Εκδότης:	Elsevier B.V.
Ημερομηνία:	2017
Γλώσσα:	Αγγλικά
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2017.01.022
Περίληψη:	Modifier-mixing provides a well-established tool for generating non-linear trends in physical properties of multi-component glasses. While typically, mixtures of alkali or alkaline earth ions are considered, here, we report on the structural incorporation of Co2 + and Mn2 +, respectively, in strontium metaphosphate glasses, and on the associated Co-Sr/Mn-Sr mixed-modifier effect. Structural variations in the short and intermediate range were investigated with vibrational spectroscopy and synchrotron X-ray diffraction, elucidating the coordination states of the two transition metals as a function of mixing ratio. For the join of Co-Sr, we find that the octahedral coordination dominates for lower contents of cobalt, whereas the tetrahedral state is predominantly found at higher cobalt concentration. The analogue decrease in the coordination number is weaker when mixing manganese and strontium ions. Coordination numbers are shown to correlate clearly with vibrational spectroscopic data and macroscopic physical properties.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	460
Σελίδες:	136-145
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	Mixed-modifier effect Phosphate glass Transition metal
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2017 Elsevier B.V.
Σημειώσεις:	This work was financially supported by the German Science Foundation through its priority program 1594 ?Topological Engineering of Ultrastrong Glasses? (grant. no. WO1220/9) and the joint DAAD-IKYDA program for fostering exchange between German and Greek universities (grant no. 57161434).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο