Various glasses with different compositions (50 -2x)ZnO-xBi2O3-(50 + x)P2O5 (x = 0 -20 mol%) were prepared. This study examined the effect of the structure and properties in phosphate glass system according to the change in Bi2O3 content in ZnO-Bi2O3-P2O5 glass. The structure of the glasses was analyzed by Fourier transform infrared (FT-IR) analysis. The FTIR spectra were recorded in the spectral range from 400 to 1400 cm -1 . The structural investigations based on these spectra showed the rapid depolymerization of the phosphate chains with increasing Bi2O3 content along with the formation of P-O-Bi bonds. The density, glass transition temperature (Tg), molar volume and optical properties of the glasses were determined from the structural changes in the glasses. Tg, density and molar volume increased with increasing in Bi2O3 content in the glass. The optical absorption edge (λ cut-off) and optical band gap (Eg) were determined from the optical transmittance spectra of the polished samples recorded at room temperature, and found to be associated with structural changes occurring in these glasses with increasing Bi2O3 content.

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While many Lyα blobs (LABs) are found in and around several well-known protoclusters at high redshift, how they trace the underlying large-scale structure is still poorly understood. In this work, we utilize 5352 Lyα emitters (LAEs) and 129 LABs at z = 3.1 identified over a ∼9.5 deg2 area in early data from the ongoing One-hundred-deg2 DECam Imaging in Narrowbands (ODIN) survey to investigate this question. Using LAEs as tracers of the underlying matter distribution, we identify overdense structures as galaxy groups, protoclusters, and filaments of the cosmic web. We find that LABs preferentially reside in regions of higher-than-average density and are located in closer proximity to overdense structures, which represent the sites of protoclusters and their substructures. Moreover, protoclusters hosting one or more LABs tend to have a higher descendant mass than those which do not. Blobs are also strongly associated with filaments of the cosmic web, with ∼70% of the population being within a projected distance of ∼2.4 pMpc from a filament. We show that the proximity of LABs to protoclusters is naturally explained by their association with filaments as large cosmic structures are where many filaments converge. The contiguous wide-field coverage of the ODIN survey allows us to establish firmly a connection between LABs as a population and filaments of the cosmic web for the first time.