Conditions Extrêmes et Matériaux : Haute Température et Irradiation
CEMHTI - UPR3079 CNRS

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2016

ACL
doi

S.Liu, G.Zhang, S.Wan, J.L.You, M.R.Ammar, A.Canizarès, P.Simon, Y.Wu, 'High-temperature Raman spectroscopy of the Cs2O-B2O3-MoO3 system for CsB3O5 crystal growth', J. Appl. Crystallogr. 49 479-484 (2016) doi:10.1107/s160057671600114x

Raman spectroscopy at high temperature has been applied to study in situ the microstructure of the solution in a Cs2O-B2O3-MoO3 growth system. A crystal-solution interface was observed. The BO groups consist of spiral chains based on B3O4Ø2 rings in the solution (Ø is a bridging O atom). The Raman spectrum of the solution indicates that MoO4 tetrahedra existed in the growth system. The nonbridging O atoms of the chains combined with the MoO4 groups, which decreased the viscosity. The Raman spectra near the interface show that at the boundary an isomerization reaction from three- to four-coordinated boron occurred. The formation of B3Ø7 triborate groups occurred. The morphology of the CsB3O5 crystal resulting from spontaneous crystallization was observed to correspond to our expectations