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- W2063855464 abstract "We present the in-situ X-ray diffraction studies of RbN3 up to 42.0 GPa at room temperature to supplement the high pressure exploration of alkali azides. Two pressure-induced phase transitions of α-RbN3 → γ-RbN3 → δ-RbN3 were revealed at 6.5 and 16.0 GPa, respectively. During the phase transition of α-RbN3 → γ-RbN3, lattice symmetry decreases from a fourfold to a twofold axis accompanied by a rearrangement of azide anions. The γ-RbN3 was identified to be a monoclinic structure with C2/m space group. Upon further compression, an orthogonal arrangement of azide anions becomes energetically favorable for δ-RbN3. The compressibility of α-RbN3 is anisotropic due to the orientation of azide anions. The bulk modulus of α-RbN3 is 18.4 GPa, quite close to those of KN3 and CsN3. By comparing the phase transition pressures of alkali azides, their ionic character is found to play a key role in pressure-induced phase transitions." @default.
- W2063855464 created "2016-06-24" @default.
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- W2063855464 date "2014-08-18" @default.
- W2063855464 modified "2023-09-30" @default.
- W2063855464 title "Pressure-induced phase transitions in rubidium azide: Studied by <i>in-situ</i> x-ray diffraction" @default.
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- W2063855464 doi "https://doi.org/10.1063/1.4893464" @default.
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