Here is carried out a Raman scattering study on the boson peak evolution of an iron-rich peralkaline rhyolite in function of both the iron oxidation state and the glass transition temperature. It is reported here that the distribution of low-frequency modes in the boson peak range is only slightly affected for an iron ratio (Fe³⁺/Fe_tot.) from 0.83 down to 0.24. Their distribution does not change in the boson peak range as a function of Fe³⁺/Fe_tot., until the reduction process starts to modify the glass network from a dominantly fourfold coordinated Fe³⁺ structures into a structure mostly governed by fivefold coordinated Fe²⁺. This trend is also related to a decreasing glass transition temperature peak, mirroring an increasing proportion of weakest bonds with respect to the stronger ones.

这里对富铁过碱性流纹岩的玻色子峰演化与铁氧化态和玻璃化转变温度的函数进行了拉曼散射研究。据报道，当铁比 (Fe ³⁺ /Fe _tot. ) 从 0.83 降至 0.24 时，玻色子峰值范围内低频模式的分布仅受到轻微影响。它们的分布在玻色子峰值范围内不会随着 Fe ³⁺ /Fe _{tot 的变化而变化。}，直到还原过程开始将玻璃网络从主要的四重配位 Fe ^{3+结构修改为主要由五重配位 Fe 2+}控制的结构。这种趋势还与玻璃化转变温度峰值的降低有关，反映出最弱键相对于最强键的比例不断增加。